Washers

Washers help distribute clamping load across a wider surface area, protect mating surfaces and reduce the risk of fastener pull-through. Depending on the design, they can also support vibration resistance or sealing.

No. Whether a separate washer is required depends on the joint and fastener design. In some applications, a flanged bolt can provide the load-distribution function of a separate washer.

Optimas International supplies flat, spring and specialist locking washers, as well as designs for applications requiring specific sealing or electrical properties. The appropriate type depends on the joint design and required function.

Washer materials include hardened steel, stainless steel, brass, Nylon and rubber-faced designs. Material selection is matched to factors such as load, corrosion resistance, electrical requirements and sealing performance.

Spring and locking washers can provide additional resistance to loosening in suitable vibration-prone joints. Their suitability depends on the joint design, operating conditions and required clamping performance.

Washer dimensions should be matched to the paired fastener and assembly requirements. Key considerations include the inner diameter, outer diameter and washer thickness, as well as the required load distribution and surface protection.

Flat washers can be supplied to DIN 125, DIN 9021 and ISO 7089, depending on the required configuration. Spring and locking washers can also be supplied to relevant DIN standards.

Yes. Rubber-faced washer designs can support sealing against moisture or fluid ingress where required. The appropriate washer should be selected according to the sealing and environmental requirements of the application.

Yes. PPAP Level 3 documentation is available where required to support automotive production part approval.

Optimas International helps manufacturers select washers based on the application, paired fastener, clamping load, vibration, mating materials and environmental conditions. Our engineering team can also advise whether a separate washer or flanged fastener is the most appropriate solution.