BS 2558:1954

What is BS 2558 - Tubular box spanners about?  

BS 2558 relates to tubular box spanners suitable for the following hexagon standards or ranges: 

• BS 1768, Unified precision hexagon bolts, screws, nuts (UNC and UNF threads) and plain washers. Normal series 
• BS 1769, Unified black hexagon bolts, screws, nuts (UNC and UNF) and plain washers. Heavy series 
• BS 1981, Unified machine screws and machine screw nuts 
• BS 1083, Precision hexagon bolts, screws, nuts (BSW and BSF threads) and plain washers 
• BS 916, Black bolts and nuts. Hexagon and square, BSW and BSF 
• BS 57, B.A. screws, bolts, nuts and plain washers 

BS 2558 includes clauses for material, heat treatment, marking, tests and dimensional details together with requirements for the tommy bars by which the spanners are operated. 

Who is BS 2558 - Tubular box spanners for? 

BS 2558 on the specification for tubular box spanners is useful for: 

• Manufacturers of hardware tools 
• Designers of hardware tools 
• Quality control personnel 
• Testing and inspection personnel 

Why should you use BS 2558 - Tubular box spanners?  

Tubular box spanners are commonly used in the automobile and other industries for tightening nuts and bolts. The tightening function of these spanners depends on their design and dimensions as any major deformation could hinder it and render spanners defective. 

BS 2558 helps you in the production stages of tubular box spanners by providing you guidance on material requirements for tommy bars and tubular box spanners. BS 2558 also provides you with dimensions and tolerances for these spanners which ensures their efficient functionality. BS 2558 also provides you guidance on performance tests for spanners to ensure that the performance requirements are met. 

In conclusion, BS 2558 guides you to design, produce, and commercialize high-quality tubular box spanners.