Specification for engineers\' parallels Metric units

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

16-06-1972

Publisher

British Standards Institution

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.

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.

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

BS 906-2:1972	Specification for engineers\' parallels. Imperial units
BS 1685:1951	Specification for bevel protractors (mechanical and optical)
BS 959:1950	Specification for internal micrometers (including stick micrometers)
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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BS 906-1:1972

Current

Table of Contents

Abstract

Scope

General Product Information

Standards Referenced By This Book

Standards Referencing This Book

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