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ICS 49.030.20
NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW
Specification for aluminium alloy, mushroom-headed, slotted drive, bolts (unified thread)
BS 4A 170:1999 +A1:2012
Trang 2
This British Standard, having
been prepared under the
direction of the Engineering
Sector Committee, was published
under the authority of the
Standards Committee and comes
into effect on 15 June 1999
BSI 06-1999
The following BSI references
relate to the work on this
standard:
Committee reference ACE/12
Draft for comment 98/706176 DC
ISBN 0 580 28286 4
BS 4A 170:1999
Amendments issued since publication
Committees responsible for this British Standard
The preparation of this British Standard was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, upon which the following bodies were represented:
Civil Aviation Authority (Airworthiness Division) Confederation of British Forgers
Ministry of Defence Society of British Aerospace Companies Limited Co-opted member
This British Standard, having
been prepared under the
direction of the Engineering
Sector Committee, was published
under the authority of the
Standards Committee and comes
into effect on 15 June 1999
BSI 06-1999
The following BSI references
relate to the work on this
standard:
Committee reference ACE/12
Draft for comment 98/706176 DC
ISBN 0 580 28286 4
BS 4A 170:1999
Amendments issued since publication
Committees responsible for this British Standard
The preparation of this British Standard was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, upon which the following bodies were represented:
Civil Aviation Authority (Airworthiness Division) Confederation of British Forgers
Ministry of Defence Society of British Aerospace Companies Limited Co-opted member
BS 4A 170:1999+A1:2012
ISBN 978 0 580 76867 5
Amendments issued since publication
These British Standards,
having been prepared under
the direction of the Engineering
Sector Committee, was
published under the authority of
the Standards Committee and
comes into effect on
15 June 1999
© The British Standards
Institution 2012
Published by BSI Limited 2012
The following BSI references
relate to the work on this
standard:
Committee reference ACE/12
Draft for comment 98/706176 DC
12/30254205 DC
Trang 3BS 4A 170:1999
Contents
Page
BS 4A 170:1999+A1:2012
i
© The British Standards Institution 2012
Protective finish
Trang 4ii BSI 06-1999
BS 4A 170:1999
Foreword
This British Standard has been prepared by Technical Committee ACE/12 It supersedes BS 3A 170:1962 which is withdrawn
This revision of BS A 170 refers to the relevant requirements in BS A 100 It incorporates amendment 1
A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application
Compliance with a British Standard does not of itself confer immunity from legal obligations.
Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 7 and a back cover
BS 4A 170:1999
Foreword
This British Standard has been prepared by Technical Committee ACE/12 It supersedes BS 3A 170:1962 which is withdrawn
This revision of BS A 170 refers to the relevant requirements in BS A 100 It incorporates amendment 1
A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application
Compliance with a British Standard does not of itself confer immunity from legal obligations.
Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 7 and a back cover
BS 4A 170:1999
Foreword
This British Standard has been prepared by Technical Committee ACE/12 It supersedes BS 3A 170:1962 which is withdrawn
This revision of BS A 170 refers to the relevant requirements in BS A 100 It incorporates amendment 1
A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application
Compliance with a British Standard does not of itself confer immunity from legal obligations.
Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 7 and a back cover
BS 4A 170:1999+A1:2012
This British Standard is published by BSI Standards Limited, under licence from The British Standards Institution
This British Standard has been prepared by Technical Committee ACE/12
BS 4A 170:1999+A1:2012 supersedes BS 4A 170:1999, which is withdrawn The start and finish of text introduced or altered by Amendment No 1 is indicated in the text by tags and Minor editorial changes are not tagged This revision of BS A 170 refers to the relevant requirements in BS A 100 This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application
Compliance with a British Standard cannot confer immunity from legal obligations.
Trang 5 BSI 06-1999 1
BS 4A 170:1999
1 Scope
This British Standard specifies materials and manufacture, dimensions, protective treatment and quality assurance requirements for aluminium alloy, mushroom-headed, slotted, drive bolts with unified threads
NOTE The latest edition of an Aerospace Series standard is indicated by a prefix number.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard For dated references, subsequent amendments to, or revisions of, any of these publications do not apply
For undated references, the latest edition of the publication referred to applies
requirements for bolts and free running nuts of tensile strength not exceeding 1 249 MPa.
sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7,
Mn 0.8).
3 General requirements
Bolts shall conform to BS A 100
4 Materials and manufacture
The bolts shall be machined from bars that conform
to L168
5 Dimensions and tolerances
5.1 All finished bolts, shall conform to the
dimensions and tolerances given in Tables 1 and 2
5.2 The clamping length of the bolt shall conform to
the dimensions and tolerances given in Table 2 and shall be such that, when a standard nut without countersink or ring gauge without countersunk has been screwed on as far as possible by hand, its
of the bolt head The runout of the thread shall not exceed twice the pitch
5.3 The nominal length of the bolt shall be the
pitches
increments but where a 0.05 length increment is required this is permissible by agreement between manufacturer and user and
accordingly.
6 Screw threads
The bolts shall have unified screw threads of the form and fit specified in the latest edition of
BS A 100
7 Anti-corrosion treatment
All finished bolts shall be anodized and dyed green
NOTE Because of the use of the chromic acid process for anodizing, the bolts will not necessarily be uniformly coloured after staining.
8 Hardness values
NOTE Hardness values are not currently applicable, though they may become applicable in the near future.
9 Identifying and marking
The bolts shall be identified in accordance with the
requirements specified in BS 3A 100:1991 clause 8.
10 Quality assurance procedure
The bolts shall conform to the quality requirements specified in BS A 100, as appropriate to the method
of manufacture
BS 4A 170:1999
1 Scope
This British Standard specifies materials and manufacture, dimensions, protective treatment and quality assurance requirements for aluminium alloy, mushroom-headed, slotted, drive bolts with unified threads
NOTE The latest edition of an Aerospace Series standard is indicated by a prefix number.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard For dated references, subsequent amendments to, or revisions of, any of these publications do not apply
For undated references, the latest edition of the publication referred to applies
requirements for bolts and free running nuts of tensile strength not exceeding 1 249 MPa.
sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7,
Mn 0.8).
3 General requirements
Bolts shall conform to BS A 100
4 Materials and manufacture
The bolts shall be machined from bars that conform
to L168
5 Dimensions and tolerances
5.1 All finished bolts, shall conform to the
dimensions and tolerances given in Tables 1 and 2
5.2 The clamping length of the bolt shall conform to
the dimensions and tolerances given in Table 2 and shall be such that, when a standard nut without countersink or ring gauge without countersunk has been screwed on as far as possible by hand, its
of the bolt head The runout of the thread shall not exceed twice the pitch
5.3 The nominal length of the bolt shall be the
pitches
increments but where a 0.05 length increment is required this is permissible by agreement between manufacturer and user and
accordingly.
6 Screw threads
The bolts shall have unified screw threads of the form and fit specified in the latest edition of
BS A 100
7 Anti-corrosion treatment
All finished bolts shall be anodized and dyed green
NOTE Because of the use of the chromic acid process for anodizing, the bolts will not necessarily be uniformly coloured after staining.
8 Hardness values
NOTE Hardness values are not currently applicable, though they may become applicable in the near future.
9 Identifying and marking
The bolts shall be identified in accordance with the
requirements specified in BS 3A 100:1991 clause 8.
10 Quality assurance procedure
The bolts shall conform to the quality requirements specified in BS A 100, as appropriate to the method
of manufacture
BS 4A 170:1999
1 Scope
This British Standard specifies materials and manufacture, dimensions, protective treatment and quality assurance requirements for aluminium alloy, mushroom-headed, slotted, drive bolts with unified threads
NOTE The latest edition of an Aerospace Series standard is indicated by a prefix number.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard For dated references, subsequent amendments to, or revisions of, any of these publications do not apply
For undated references, the latest edition of the publication referred to applies
requirements for bolts and free running nuts of tensile strength not exceeding 1 249 MPa.
sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7,
Mn 0.8).
3 General requirements
Bolts shall conform to BS A 100
4 Materials and manufacture
The bolts shall be machined from bars that conform
to L168
5 Dimensions and tolerances
5.1 All finished bolts, shall conform to the
dimensions and tolerances given in Tables 1 and 2
5.2 The clamping length of the bolt shall conform to
the dimensions and tolerances given in Table 2 and shall be such that, when a standard nut without countersink or ring gauge without countersunk has been screwed on as far as possible by hand, its
of the bolt head The runout of the thread shall not exceed twice the pitch
5.3 The nominal length of the bolt shall be the
pitches
increments but where a 0.05 length increment is required this is permissible by agreement between manufacturer and user and
accordingly.
6 Screw threads
The bolts shall have unified screw threads of the form and fit specified in the latest edition of
BS A 100
7 Anti-corrosion treatment
All finished bolts shall be anodized and dyed green
NOTE Because of the use of the chromic acid process for anodizing, the bolts will not necessarily be uniformly coloured after staining.
8 Hardness values
NOTE Hardness values are not currently applicable, though they may become applicable in the near future.
9 Identifying and marking
The bolts shall be identified in accordance with the
requirements specified in BS 3A 100:1991 clause 8.
10 Quality assurance procedure
The bolts shall conform to the quality requirements specified in BS A 100, as appropriate to the method
of manufacture
BS 4A 170:1999
1 Scope
This British Standard specifies materials and manufacture, dimensions, protective treatment and quality assurance requirements for aluminium alloy, mushroom-headed, slotted, drive bolts with unified threads
NOTE The latest edition of an Aerospace Series standard is indicated by a prefix number.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard For dated references, subsequent amendments to, or revisions of, any of these publications do not apply
For undated references, the latest edition of the publication referred to applies
requirements for bolts and free running nuts of tensile strength not exceeding 1 249 MPa.
sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7,
Mn 0.8).
3 General requirements
Bolts shall conform to BS A 100
4 Materials and manufacture
The bolts shall be machined from bars that conform
to L168
5 Dimensions and tolerances
5.1 All finished bolts, shall conform to the
dimensions and tolerances given in Tables 1 and 2
5.2 The clamping length of the bolt shall conform to
the dimensions and tolerances given in Table 2 and shall be such that, when a standard nut without countersink or ring gauge without countersunk has been screwed on as far as possible by hand, its
of the bolt head The runout of the thread shall not exceed twice the pitch
5.3 The nominal length of the bolt shall be the
pitches
increments but where a 0.05 length increment is required this is permissible by agreement between manufacturer and user and
accordingly.
6 Screw threads
The bolts shall have unified screw threads of the form and fit specified in the latest edition of
BS A 100
7 Anti-corrosion treatment
All finished bolts shall be anodized and dyed green
NOTE Because of the use of the chromic acid process for anodizing, the bolts will not necessarily be uniformly coloured after staining.
8 Hardness values
NOTE Hardness values are not currently applicable, though they may become applicable in the near future.
9 Identifying and marking
The bolts shall be identified in accordance with the
requirements specified in BS 3A 100:1991 clause 8.
10 Quality assurance procedure
The bolts shall conform to the quality requirements specified in BS A 100, as appropriate to the method
of manufacture
BS 4A 170:1999
1 Scope
This British Standard specifies materials and manufacture, dimensions, protective treatment and quality assurance requirements for aluminium alloy, mushroom-headed, slotted, drive bolts with unified threads
NOTE The latest edition of an Aerospace Series standard is indicated by a prefix number.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard For dated references, subsequent amendments to, or revisions of, any of these publications do not apply
For undated references, the latest edition of the publication referred to applies
requirements for bolts and free running nuts of tensile strength not exceeding 1 249 MPa.
sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7,
Mn 0.8).
3 General requirements
Bolts shall conform to BS A 100
4 Materials and manufacture
The bolts shall be machined from bars that conform
to L168
5 Dimensions and tolerances
5.1 All finished bolts, shall conform to the
dimensions and tolerances given in Tables 1 and 2
5.2 The clamping length of the bolt shall conform to
the dimensions and tolerances given in Table 2 and shall be such that, when a standard nut without countersink or ring gauge without countersunk has been screwed on as far as possible by hand, its
of the bolt head The runout of the thread shall not exceed twice the pitch
5.3 The nominal length of the bolt shall be the
pitches
increments but where a 0.05 length increment is required this is permissible by agreement between manufacturer and user and
accordingly.
6 Screw threads
The bolts shall have unified screw threads of the form and fit specified in the latest edition of
BS A 100
7 Anti-corrosion treatment
All finished bolts shall be anodized and dyed green
NOTE Because of the use of the chromic acid process for anodizing, the bolts will not necessarily be uniformly coloured after staining.
8 Hardness values
NOTE Hardness values are not currently applicable, though they may become applicable in the near future.
9 Identifying and marking
The bolts shall be identified in accordance with the
requirements specified in BS 3A 100:1991 clause 8.
10 Quality assurance procedure
The bolts shall conform to the quality requirements specified in BS A 100, as appropriate to the method
of manufacture
BS 4A 170:1999
1 Scope
This British Standard specifies materials and manufacture, dimensions, protective treatment and quality assurance requirements for aluminium alloy, mushroom-headed, slotted, drive bolts with unified threads
NOTE The latest edition of an Aerospace Series standard is indicated by a prefix number.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard For dated references, subsequent amendments to, or revisions of, any of these publications do not apply
For undated references, the latest edition of the publication referred to applies
requirements for bolts and free running nuts of tensile strength not exceeding 1 249 MPa.
sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7,
Mn 0.8).
3 General requirements
Bolts shall conform to BS A 100
4 Materials and manufacture
The bolts shall be machined from bars that conform
to L168
5 Dimensions and tolerances
5.1 All finished bolts, shall conform to the
dimensions and tolerances given in Tables 1 and 2
5.2 The clamping length of the bolt shall conform to
the dimensions and tolerances given in Table 2 and shall be such that, when a standard nut without countersink or ring gauge without countersunk has been screwed on as far as possible by hand, its
of the bolt head The runout of the thread shall not exceed twice the pitch
5.3 The nominal length of the bolt shall be the
pitches
increments but where a 0.05 length increment is required this is permissible by agreement between manufacturer and user and
accordingly.
6 Screw threads
The bolts shall have unified screw threads of the form and fit specified in the latest edition of
BS A 100
7 Anti-corrosion treatment
All finished bolts shall be anodized and dyed green NOTE Because of the use of the chromic acid process for anodizing, the bolts will not necessarily be uniformly coloured after staining.
8 Hardness values
NOTE Hardness values are not currently applicable, though they may become applicable in the near future.
9 Identifying and marking
The bolts shall be identified in accordance with the
requirements specified in BS 3A 100:1991 clause 8.
10 Quality assurance procedure
The bolts shall conform to the quality requirements specified in BS A 100, as appropriate to the method
of manufacture
BS 4A 170:1999
1 Scope
This British Standard specifies materials and manufacture, dimensions, protective treatment and quality assurance requirements for aluminium alloy, mushroom-headed, slotted, drive bolts with unified threads
NOTE The latest edition of an Aerospace Series standard is indicated by a prefix number.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard For dated references, subsequent amendments to, or revisions of, any of these publications do not apply
For undated references, the latest edition of the publication referred to applies
requirements for bolts and free running nuts of tensile strength not exceeding 1 249 MPa.
sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7,
Mn 0.8).
3 General requirements
Bolts shall conform to BS A 100
4 Materials and manufacture
The bolts shall be machined from bars that conform
to L168
5 Dimensions and tolerances
5.1 All finished bolts, shall conform to the
dimensions and tolerances given in Tables 1 and 2
5.2 The clamping length of the bolt shall conform to
the dimensions and tolerances given in Table 2 and shall be such that, when a standard nut without countersink or ring gauge without countersunk has been screwed on as far as possible by hand, its
of the bolt head The runout of the thread shall not exceed twice the pitch
5.3 The nominal length of the bolt shall be the
pitches
increments but where a 0.05 length increment is required this is permissible by agreement between manufacturer and user and
accordingly.
6 Screw threads
The bolts shall have unified screw threads of the form and fit specified in the latest edition of
BS A 100
7 Anti-corrosion treatment
All finished bolts shall be anodized and dyed green
NOTE Because of the use of the chromic acid process for anodizing, the bolts will not necessarily be uniformly coloured after staining.
8 Hardness values
NOTE Hardness values are not currently applicable, though they may become applicable in the near future.
9 Identifying and marking
The bolts shall be identified in accordance with the
requirements specified in BS 3A 100:1991 clause 8.
10 Quality assurance procedure
The bolts shall conform to the quality requirements specified in BS A 100, as appropriate to the method
of manufacture
BS 4A 170:1999+A1:2012
1
© The British Standards Institution 2012
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies
For undated references, the latest edition of the referenced document (including any amendments) applies
BS 4A 100:2003, Specification for general
BS 1580-1 Unified screw threads – Part 1:
Screw threads with diameters ¼ in and larger – Requirements
BS 1580-3, Unified screw threads – Part 3: Screw
threads with diameters below ¼ in – Requirements
BS EN 2284, Specification for sulfuric acid anodizing
of aluminium and wrought aluminium alloys.
BS 4A 100:2003
BS L 168
BS 4A 100:2003
BS 4A 100:2003
specified in BS 4A 100:2003, as appropriate
to the method of manufacture
7 Protective finish
All finished bolts shall be sulphuric acid anodized, coloured green and sealed in pure water in
accordance with BS EN 2284:1991, Type BC
NOTE Bolts are not always uniformly coloured after dyeing due to the sulphuric acid anodizing process.
Trang 62 BSI 06-1999
BS 4A 170:1999
L*
D
J C
E *
F
(bearing length)
(clamping length) (overall length)
(for ref
only) B
Max runout of thread = 2 x pitch
45 °
R rad
U rad
Figure 1 Ð Dimensions of bolts
L
M E
Figure 2 Ð Bearing lengthL,
clamping lengthM and overall
lengthE
BS 4A 170:1999+A1:2012
Trang 7 BSI 06-1999 3
BS 4A 170:1999
equivalent o nominal size
Cylindrical portion
ref. only
a This
b To
BS 4A 170:1999+A1:2012
3
© The British Standards Institution 2012
6–32 UNC 8–32 UNC 10–32 UNF 1 / 4 –28 UNF
5 / 16 –24 UNF
0.138-32 UNC 0.164-32 UNC 0.190-32 UNF 0.250-28 UNF 0.3125-24 UNF
nominal thread
Nominal thread size
runout (2
Trang 84 BSI 06-1999
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999+A1:2012
23 D
24 D
25 D
Trang 9 BSI 06-1999 5
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999+A1:2012
5
© The British Standards Institution 2012
Trang 106 BSI 06-1999
BS 4A 170:1999
Table 2 Ð Bearing lengthL, clamping length M and overall length E (continued)
BS 4A 170:1999+A1:2012