Value Collection MPA98021 Wedge Lock Washer 9/16 316L Ss

Product Description

The VALUE COLLECTION MPA98021 is a wedge lock washer engineered to maintain fastener tension under vibration and dynamic load conditions. Manufactured from 316L stainless steel in an uncoated finish, this washer delivers strong corrosion resistance, making it suitable for harsh or wet environments. The outer diameter measures 0.918 inches with a minimum OD of 0.902 inches. The inside diameter ranges from 0.592 to 0.608 inches, fitting 9/16-inch (M14) threaded fasteners. The wedge-lock design uses opposing cam faces that grip tighter as the joint vibrates, resisting loosening without chemical threadlockers or locking inserts. Sold in a package quantity of two.

This washer is used in mechanical, structural, and industrial assembly applications where standard flat or split washers are insufficient to prevent fastener back-off. The 316L stainless grade is a common choice for marine, chemical processing, food service, and outdoor applications where chloride exposure or moisture is a concern. Typical installations include bolted flanges, pipe supports, equipment mounts, and structural connections requiring reliable clamp load retention over time. Installers working under ISO 14001 or ISO 9001 quality frameworks will find this part meets those fastener standards.

Key Features

• Wedge-lock cam face design resists fastener loosening under vibration without threadlocker compounds
• 316L stainless steel construction provides excellent corrosion and chloride resistance
• Uncoated finish — no coating thickness variation to account for in torque calculations
• Fits 9/16-inch (M14) threaded fasteners
• Meets ISO 14001 and ISO 9001 fastener standards
• Sold in a package quantity of two

Compatibility

Designed for use with 9/16-inch (M14) threaded fasteners requiring a wedge-lock style washer in 316L stainless steel with an uncoated finish.

Installation Notes

Wedge lock washers are installed in pairs with the cam faces mating against each other between the fastener bearing surface and the workpiece. Ensure mating surfaces are clean and free of debris before installation. Follow applicable torque specifications from the fastener or equipment manufacturer — do not use estimated torque values. No special tools beyond standard wrenches or torque wrenches are required for installation.