Value Collection 744231PS M42 Split Lock Washer Grade 8

Product Description

The VALUE COLLECTION 744231PS is an M42 metric split lock washer manufactured from Grade 8 spring steel with a bright uncoated finish. Designed to resist loosening under vibration and dynamic loads, this washer seats beneath a fastener head or nut to maintain clamp force in bolted assemblies. The helical split design bites into both the mating surface and the fastener bearing face as the joint settles. With a hardness rating of 44-51 HRC and conformance to DIN 127, it meets the dimensional and mechanical standards expected in precision and industrial fastening applications. Licensed trades and maintenance professionals working on heavy mechanical assemblies, structural joints, and industrial equipment will find this washer a direct fit for M42 fastener installations.

This washer is suited for use in heavy industrial, structural, and mechanical assemblies requiring an M42 fastener. Typical applications include large machinery frames, equipment mounting structures, and fabricated steel assemblies where joint integrity under vibration is a priority. The uncoated finish is appropriate for indoor applications or situations where a secondary coating or treatment will be applied by the installer. This item is sold individually with a minimum order quantity of 5 pieces.

Key Features

• M42 screw size with 42.5mm minimum inside diameter and 43.7mm maximum inside diameter
• 68.2mm outside diameter per DIN 127 metric standard
• 7mm thick helical split profile maintains preload under vibration
• Grade 8 spring steel construction with 44-51 HRC hardness range
• Bright uncoated finish — no additional coating to affect dimensional tolerances
• Conforms to DIN 127 fastener standard, metric system of measurement

Compatibility

Designed as a DIN 127 metric split lock washer for use with M42 fasteners in industrial and structural bolted assemblies.

Installation Notes

Installation is typically performed by millwrights, structural ironworkers, or industrial maintenance technicians during assembly or repair of heavy mechanical equipment. Power down and de-energize all related equipment before performing any fastener work on live machinery. Place the washer flat side down against the mating surface with the split end oriented to bite into the bearing surface as the fastener is tightened. Do not reuse split lock washers that have been fully compressed flat, as they will not provide effective locking action.