Washers
Types of Washers
Flat Washer
plain washer · USS washer
A flat washer is a thin, disc-shaped plate with a central hole that distributes the load of a fastener head or…
Fender Washer
large OD washer · penny washer
A fender washer is a flat washer with an extra-large outside diameter, made to spread load over thin or soft m…
Split Lock Washer
helical spring washer · spring lock washer
A split lock washer is a helical, split ring that acts as a spring to add tension against the nut or bolt head…
Belleville Washer
conical spring washer · disc spring
A Belleville washer is a conical disc spring that flattens under load, maintaining a predictable preload and c…
Structural Washer
F436 washer · hardened washer
A structural washer is a thick, hardened washer used under the head and nut of structural bolts to protect the…
Tooth Lock Washer
star washer · internal tooth washer
A tooth lock washer has radial teeth that bite into the fastener and the mating surface, resisting loosening a…
Wave Washer
wave spring washer · wavy washer
A wave washer is a thin, wavy spring washer that provides light, repeatable preload in a compact space — commo…
Bonded Sealing Washer
sealing washer · neoprene washer
A bonded sealing washer has a rubber sealing ring bonded to a steel washer, sealing the fastener hole against …
Finishing Washer
cup washer · countersunk washer
A finishing washer is a cupped washer with a countersunk recess that lets a flat-head screw sit flush, giving …
Square Plate Washer
timber washer · dock washer
A square plate washer is a large, thick square washer that spreads heavy bolt load over soft wood — used on ti…
Curved (Crescent) Washer
crescent washer · curved spring washer
A curved washer is a slightly bowed disc that acts as a light spring, taking up play and keeping light assembl…
Tab Washer
lock tab washer · tab lock washer
A tab washer is a thin washer with one or more tabs that bend up against the nut flat and down into a keyway o…
Spacer Washer
shim washer · ground spacer
A spacer washer is a precision-thickness washer used to set exact gaps and preload — for shimming bearings, ge…