Parallel screw threads of Whitworth form. Requirements not-eligible and procedures resulting in or

and procedures resulting in or from engine maintenance

The significant hazards covered by this European Standard are identified in Clause 4

Test laboratories/test person of PPE gloves

Acrylic resin cement

Parallel screw threads of Whitworth form. Requirements not-eligible and procedures resulting in orThis British Standard specifies limits of sizes, and tolerances, for single start parallel screw threads of Whitworth form, for general engineering use. While Whitworth threads have remained unchanged since the last revision of BS 84 in 1956, the present revision of the Standard has been undertaken on the basis that Whitworth threads will undoubtedly continue to be used for many years, especially on replacements or spare parts. This standard specifies