Value Collection 42450 M4 Split Lock Washer Grade 8 Din 127

Product Description

The VALUE COLLECTION 42450 is a metric split lock washer designed for M4 fastener assemblies requiring reliable vibration resistance. Manufactured from Grade 8 spring steel with a zinc plated finish, this washer delivers hardness in the 44-51 HRC range, making it suitable for demanding mechanical and structural fastening applications. The split design applies spring tension against the fastener and mating surface to resist loosening under dynamic loads. Licensed trades and industrial maintenance professionals specify split lock washers at this grade level where corrosion resistance and consistent clamping force are required.

This washer fits M4 screw applications in general mechanical assemblies, machinery, enclosures, and equipment panels. It is sized to a 4.1 mm minimum inside diameter with a 4.4 mm maximum inside diameter, a 7.6 mm maximum outside diameter, and a 0.9 mm thickness. Conforming to DIN 127, it meets the metric fastener standard used across European-spec and metric industrial equipment. Sold individually with a minimum order quantity of 200 pieces per order.

Key Features

• Grade 8 spring steel construction with 44-51 HRC hardness rating
• Zinc plated finish for basic corrosion protection
• Split lock design resists fastener loosening under vibration
• Conforms to DIN 127 metric fastener standard
• Inside diameter range of 4.1 to 4.4 mm fits standard M4 screws
• Does not meet military specifications — intended for commercial and industrial use

Compatibility

Designed for use with M4 metric screws and bolts in standard commercial and industrial fastening assemblies conforming to DIN 127 metric specifications.

Installation Notes

Install with the split gap positioned so the washer edges can bite into the fastener and mating surface as the fastener is torqued. Place the split lock washer between the fastener head and the mating surface or flat washer before assembly. Ensure mating surfaces are clean and free of debris before installation. This part does not require special tooling beyond standard hand or power fastening equipment.