BS 84:1956
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Specification for parallel screw threads of Whitworth form
Hardcopy , PDF
30-11-2007
English
26-09-1956
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Foreword
Specification
1 Scope
2 Nomenclature and definitions
3 Form of Whitworth screw threads
4 Classes of bolts and nuts
5 Standard diameter-pitch series: limits and
tolerances
6 Plated threads
7 Stainless steel bolts
8 Selected thread series
a. Basic sizes
b. Design sizes
c. Tolerances
9 Tolerances on effective diameter, pitch and flank
angles
10 Designation of screw threads of Whitworth form
11 Gauges
Tables
Coarse thread series B.S.W.
1 Basic sizes
Limits and tolerances
2 Bolts - Close class
3 Nuts - Medium class
4 Bolts - Medium class
a. Nominal sizes up to and including 3/4 in.
b. Nominal sizes above 3/4 in.
5 Nuts - Normal class
6 Bolts - Free class
a. Nominal sizes up to and including 3/4 in.
b. Nominal sizes above 3/4 in.
Fine thread series B.S.F.
7 Basic sizes
Limits and tolerances
8 Bolts - Close class
9 Nuts - Medium class
10 Bolts - Medium class
a. Nominal sizes up to and including 3/4 in.
b. Nominal sizes above 3/4 in.
11 Nuts - Normal class
12 Bolts - Free class
a. Nominal sizes up to and including 3/4 in.
b. Nominal sizes above 3/4 in.
Selected thread series Whit. S.
13 Preferred diameters and pitches - Fractional sizes
13a Preferred diameters and pitches - Decimal sizes
Selected and non-standard threads
14 Depths of thread for various pitches
15 Bolts - Medium and free class allowances
16 Bolts - Close class tolerances
17 Nuts - Medium class tolerances
18 Bolts - Medium class tolerances
19 Nuts - Normal class tolerances
20 Bolts - Free class tolerances
Truncated Whitworth form screw threads with flat crests
21 Basic data
Truncated coarse thread series B.S.W.
22 Bolts and nuts - Limits and tolerances, all classes
Truncated fine thread series B.S.F.
23 Bolts and nuts - Limits and tolerances, all classes
Coarse thread series B.S.W.
24 Nuts - Close class limits and tolerances
Fine thread series B.S.F.
25 Nuts - Close class limits and tolerances
Selected and non-standard threads
26 Nuts - Close class tolerances
Appendices
A Truncated Whitworth form threads with flat crests
B Bases of tolerances and allowances for Whitworth
form screw threads
C Tolerances on pitch and angle in relation to
tolerance on effective diameter
D Notes on the form of the crests of Whitworth threads
E Close class nuts, limits and tolerances
Tables 24-26
Form of thread defined. Tables: basic sizes, limits, tolerances for \'class\' bolts, nuts; BS Whitworth range, ⅛ in to 6 in; BS Fine range, $9C in to 4$9C in (limits and tolerances up to 3 in only). Also a Selected Thread series more suitable than BS Pipe parallel series for extra fine pitch applications. Appendices: limits, tolerances for B.S.W. and B.S.F. truncated bolts and nuts; bases of tolerances and allowances, formulae; effects of pitch and angle errors, acceptability of error combination; form of Whitworth crests; limits and tolerances for (non-preferred) \'close class\' nuts.
| Committee |
FME/9
|
| DevelopmentNote |
Inactive for the new design. (10/2005)
|
| DocumentType |
Standard
|
| Pages |
54
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
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