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The VALUE COLLECTION 31521 is a zinc-plated steel wedge lock washer engineered for threaded fastener assemblies requiring reliable vibration resistance. Sized for a 1-inch thread, it features an outer diameter of 1.5354 inches and an inner diameter of 1.1063 inches. The zinc flake finish provides corrosion protection in demanding environments. Manufactured to Grade 2 material standards and conforming to ISO 9001 and ISO 14001 quality and environmental management certifications, this washer is a dependable choice for industrial, mechanical, and structural fastening applications. Each package contains 10 washers.
Wedge lock washers are used wherever bolt loosening due to vibration or dynamic loads is a concern. Common applications include machinery assembly, structural steel connections, automotive fixtures, and equipment mounting in industrial facilities. The interlocking wedge geometry creates a mechanical locking action as the fastener is tightened, resisting back-rotation under cyclic loading. Licensed mechanics, millwrights, and maintenance technicians regularly specify this style of washer in assemblies subject to continuous vibration or thermal cycling.
Designed as an OEM-style replacement or new-installation washer for 1-inch threaded fastener assemblies requiring a wedge lock style washer in steel with zinc-plated finish.
Installation is performed by mechanics, millwrights, or maintenance technicians using standard hand or power tools appropriate for the fastener assembly. Always de-energize and lock out equipment before disassembling fastened joints on powered machinery. Install washers in mated pairs with the cam faces engaged per the wedge lock design intent. Consult applicable industry standards and equipment manufacturer torque specifications when determining final fastener preload.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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