BS 6994:1988

Foreword
Committees responsible
Specification
Section one. General
1.1 Scope
1.2 Definitions
1.3 Designation
1.4 General
1.5 Marking
1.6 Certificate of test and examination
Section two. Performance requirements
2.1 Material
2.2 Workmanship
2.3 Heat treatment
2.4 Hardness
2.5 Finish
2.6 Mechanical properties
Section three. Forms and dimensional requirements
3.1 Forms and dimensions
3.2 Tolerances on dimensions
3.3 Tolerances on screw threads and nuts
Appendices
A. Information to be supplied by the purchaser on
     the enquiry and order
B. Selection and use of shackles
C. Dimensions of shackles in the range specified in
     tables 1 to 6
D. Dimensions of shackles outside the dimensional
     range of BS 6994
E. Safe use of shackles
Tables
1. Large dee shackles
2. Small dee shackles
3. Large bow shackles
4. Small bow shackles
5. Proportions of shackles in terms of square root of
     WLL, (in tonnes)
6. Proportions of shackles in terms of d body diameter
Figures
1. Positions for marking of shackles and area for
     hardness testing
2. Dee shackle with pin type G
3. Bow shackle with pin type G
4. Pin type G. Screwed pin with eye and collar
     suitable for all sizes without restriction on
     diameter D
5. Pin type H. Countersunk screwed pin with slotted
     head. Limited to pins not exceeding 63 mm diameter
     (D)
6. Pin type K. Countersunk screwed pin with sunk
     square socket head. Limited to pins not exceeding
     63 mm diameter (D)
7. Pin type L. Pin with hexagon head, hexagon nut and
     split cotter pin, limited to pins not exceeding
     85 mm diameter (D)
8. Incorrect replacement of shackle pin
9. Correct and incorrect use of shackles
10. Use of loose spacers on shackle pin
11. Use of shackles to avoid pin unscrewing: example 1
12. Use of shackles to avoid pin unscrewing: example 2