BS 906-1:1972
Current
The latest, up-to-date edition.
Specification for engineers\' parallels Metric units
Hardcopy , PDF
English
16-06-1972
Co-operating organizations
Foreword
1 Scope
2 Material
3 Finish
4 Accuracy
5 Marking
6 Protection
Appendix - Derivation of tolerances stated in
Table 1 and Table 2
Six sizes of Grade A and eight of Grade B parallels with cross sections from 5 mm x 10 mm to 30 mm x 60 mm and from 5 mm x 10 mm to 50 mm x 100 mm respectively. Material, finish, accuracy, marking, protection.
| Committee |
TPR/1
|
| DevelopmentNote |
Supersedes 70/4282 DC (10/2005) Reviewed and confirmed by BSI, February 2012. (01/2012)
|
| DocumentType |
Standard
|
| Pages |
10
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This British Standard applies to parallel sided steel blocks of six sizes in Grade A and eight sizes in Grade B, namely:
GRADE A
5 mm × 10 mm × 100 mm
10 mm × 20 mm × 125 mm
15 mm × 30 mm × 150 mm
20 mm × 40 mm × 200 mm
25 mm × 50 mm × 250 mm
30 mm × 60 mm × 300 mm
GRADE B
5 mm × 10 mm × 100 mm
10 mm × 20 mm × 125 mm
15 mm × 30 mm × 150 mm
20 mm × 40 mm × 200 mm
25 mm × 50 mm × 250 mm
30 mm × 60 mm × 300 mm
40 mm × 80 mm × 350 mm
50 mm × 100 mm × 400 mm
NOTE 1 See also 2, Material.
NOTE 2 The titles of the British Standards referred to in this standard are listed on page ii.
| Standards | Relationship |
| UNE-EN ISO 5171:2020 | Identical |
| UNE-EN 384:2016+A2:2023 | Identical |
| BS 906-2:1972 | Specification for engineers\' parallels. Imperial units |
| BS 1685:1951 | Specification for bevel protractors (mechanical and optical) |
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| BS 957-1:1941 | Specification for feeler gauges Inch units |
| BS 959:2008 | Specification for internal micrometers (including stick micrometers) |
| 08/30177716 DC : DRAFT JUNE 2008 | BS 959 - SPECIFICATION FOR INTERNAL MICROMETERS (INCLUDING STICK MICROMETERS) |
| BS 870:1950 | Specification for external micrometers |
| BS 1734:1951 | Specification for micrometer heads |
| BS 852:1939 | Specification for toolmakers\' straightedges |
| BS 4779:1971 | Recommendations for measurement of the optical transfer function of optical devices |
| BS 1133-6(1966) : 1966 | PACKAGING CODE - TEMPORARY PROTECTION OF METAL SURFACES AGAINST CORROSION (DURING TRANSPORT AND STORAGE) |
| BS 891-1:1962 | Method for Rockwell hardness test Testing of metals |
| BS 906-2:1972 | Specification for engineers\' parallels. Imperial units |
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