BS 3382-3&4(1965) : 1965

Co-operating organizations
Foreword
Introductory notes
Specification
1 Scope
2 Definitions
3 Inspection
4 Screw thread dimensions
Part 3. Nickel or nickel plus chromium on steel
        components
5 Resistance to corrosion
6 Adhesion
7 Plating thickness
8 Chromium plating (if required)
9 Finish and appearance of plated surfaces
10 Reduction of hydrogen embrittlement
Part 4. Nickel or nickel plus chromium on copper and
        copper alloy (including brass) components
11 Resistance to corrosion
12 Adhesion
13 Plating thickness
14 Chromium plating (if required)
15 Finish and appearance of plated surfaces
Appendices
D Notes on surface areas of screws, bolts and nuts
F Strip and weigh method for the determination of
    group and sample average plating thicknesses
G Examples of calculations of deposit thicknesses on
    plated threaded shanks
Tables
1 Plating thickness (inch dimensions)
1A Plating thickness (millimetre dimensions)
2 Screws and bolts: B.S.W. and B.S.F. threads
3 Screws and bolts: UNC and UNF threads
4 Screws and bolts: B.A. threads
5 Screws and bolts: B.S.C. and B.S.P. threads
6 Screws and bolts: ISO metric threads to BS 3643
7 Nuts: B.S.W. and B.S.F. threads
8 Nuts: B.A. threads
9 Nuts: UNC and UNF threads
10 Nuts: ISO metric threads
Figures
1 Probable frequency distribution of thickness in a
    barrel load
3 Constituent surface areas of a screw or bolt

Describes nickel and nickel plus chromium plating thicknesses, sampling and other inspection procedures, and methods of thickness determination for components having threads of basic major diameters from 0.060 in to 3/4 in inclusive, specified in the following, BS 84 Parallel screw threads of Whitworth form, BS 93 British Association screw threads with tolerances for sizes 0 B.A. to 16 B.A., BS 811 cycle threads, BS 1580 unified screw threads, BS 2779 fastening threads of BSP sizes, BS 3643 ISO metric screw threads. Including bolts and screws - general purpose, nuts - general purpose.