Value Collection 84798958 M20 Split Lock Washer Grade 8

Product Description

The VALUE COLLECTION 84798958 is a metric split lock washer designed for use with M20 fasteners in high-vibration assemblies. Made from Grade 8 spring steel with a zinc plated finish, it delivers reliable tension retention under dynamic loads. The washer measures 20.2 inches minimum inside diameter to 21.2 inches maximum inside diameter, 33.6 inches outside diameter, and 4 inches thick. Hardness is rated at 44-51 HRC, providing resistance to deformation under clamp load. Licensed tradespeople and mechanical assemblers install this washer as part of bolted joint assemblies where loosening from vibration or thermal cycling is a concern.

This split lock washer is suited for industrial, commercial, and heavy mechanical applications requiring metric fastener hardware. It is commonly used in structural assemblies, machinery, equipment frames, and fabricated metalwork wherever M20 bolts or screws are specified. The DIN 127 fastener standard governs its dimensional tolerances, making it interchangeable with other DIN 127-compliant M20 split lock washers in metric assemblies.

Key Features

• Grade 8 spring steel construction with 44-51 HRC hardness for reliable clamp force retention
• Zinc plated finish for basic corrosion protection in general-purpose environments
• Conforms to DIN 127 fastener standard and meets ASME, ANSI, BS, JIS, and NFE dimensional standards
• Inside diameter range of 20.2 to 21.2 mm accommodates standard M20 bolt shanks
• 4 mm thickness provides adequate spring action to resist vibration-induced loosening

Compatibility

Designed for use with M20 metric screws and bolts. Dimensionally conforms to DIN 127 and is interchangeable with other DIN 127-compliant M20 split lock washers in metric fastener assemblies.

Installation Notes

Install between the fastener head or nut and the mating surface before torquing. Power down or de-energize any equipment before accessing bolted joints in electrical or mechanical enclosures. Follow applicable standards such as ASME or ANSI torque guidance for M20 fasteners in the relevant assembly. Do not reuse a split lock washer that has been fully compressed flat, as spring tension will be lost.