What is BS SP 122 TO 125 – Washers for unified hexagons about?  
BS SP 122 TO 125 specifies the materials, dimensions, and finish of mild steel, corrosion-resisting steel, and aluminum alloy washers suitable for use with bolts with Unified hexagons for aircraft. The washers are intended primarily for use for packing purposes.
Provision has been made for oversize bore washers for use when used in conjunction with oversize plain shank bolts, with the oversize washer being fitted onto the bolt head side of the clamped joint.
Who is BS SP 122 TO 125 - Washers for unified hexagons for?  
BS SP 122 TO 125 on washers is useful for: 
- Manufacturers and suppliers of small and big washers
- Product design engineers 
- Quality control personnel 
- Aviation, Aerospace and Defence Industries 
Why should you use BS SP 122 TO 125:2019 - Washers for unified hexagons?  
Washers are thin flat rings or perforated plates used in joints or assemblies to ensure tightness, prevent leakage, or relieve friction.
BS SP 122 TO 125 provides clear specifications, requirements, and dimensions for small as well as large washers for unified hexagons for aircraft which are primarily used for packaging purposes. 
BS SP 122 TO 125 helps you to understand and follow best practices for washers, which contributes towards the maintenance of your quality management system.
Using BS SP 122 TO 125 guidelines, you contribute towards safer equipment and expeditions as well as longevity for the carrier. 
