Washers Spec Table
Washers distribute bearing pressure from bolts and nuts and protect the fastened surface. Flat washers spread load to prevent surface damage; spring washers use elasticity to resist loosening. Toothed washers provide stronger anti-loosening performance; plastic (nylon) washers are used for electrical insulation or protecting soft materials.
Flat Washer
Flat Washer · 15 sizes
Spring Washer
Spring Washer · 12 sizes
External Tooth Washer
External Tooth Washer · 6 sizes
Internal Tooth Washer
Internal Tooth Washer · 6 sizes
Metal Washer
Metal Washer · 8 sizes
Nylon Washer
Nylon Washer · 7 sizes
Frequently Asked Questions
What is the difference between a flat washer and a spring washer?
Flat washers distribute bearing pressure and protect surfaces. Spring washers use spring action to resist vibration loosening. Both are often used together in high-vibration applications.
When should external or internal tooth lock washers be used?
Tooth lock washers bite into the contact surface to prevent rotation. External teeth suit larger contact areas; internal teeth suit narrow spaces or small-head bolts. Effective on painted and plated surfaces.
When should plastic (nylon) washers be used?
Use when electrical insulation is needed, to prevent galvanic corrosion between dissimilar metals, or to protect mating surfaces. Manage tightening torque carefully due to their lower strength.