Value Collection A410442 M4 Split Lock Washer 316 Ss 50pk

Product Description

The VALUE COLLECTION A410442 is a metric split lock washer designed for use with M4 fasteners in corrosion-resistant applications. Manufactured from 316 austenitic stainless steel to Grade A4 standards, this washer delivers reliable thread-locking performance in wet, marine, and chemically aggressive environments. It conforms to DIN 127B, the widely recognized fastener standard for split lock washers. The uncoated finish preserves the natural corrosion resistance of the base material without adding dimensional variability. Each package contains 50 washers, making it practical for service kits, maintenance stock, and small assembly runs.

This washer is suited for M4 bolt and screw assemblies in plumbing, HVAC equipment panels, pool and marine hardware, and electrical enclosures where stainless fastener hardware is specified. The 316 alloy and Grade A4 designation make it appropriate for outdoor, coastal, and chlorine-exposed installations where carbon steel or 18-8 stainless may corrode prematurely. Installers working to metric fastener specifications will find this washer sized to DIN 127B tolerances for consistent fitment across M4 fastener assemblies.

Key Features

• 316 austenitic stainless steel, Grade A4 — suitable for marine and corrosive environments
• Conforms to DIN 127B metric fastener standard
• Inside diameter range of 4.1 to 4.4mm accommodates standard M4 fastener shanks
• Maximum outside diameter of 7.6mm with 0.9mm thickness for consistent bearing surface
• Uncoated finish — no added coating to affect dimensional tolerance
• Packaged in quantities of 50 for stock and service use

Compatibility

Designed as a DIN 127B-compliant split lock washer for use with M4 metric screws and bolts in corrosion-resistant stainless steel assemblies.

Installation Notes

Split lock washers are installed between the fastener head or nut and the mating surface before final torque is applied. Power down or de-energize any equipment before accessing fastener hardware on electrical panels or mechanical assemblies. Use metric hand tools appropriate for M4 fastener sizes. Do not mix stainless steel washers with carbon steel fasteners in wet environments, as galvanic interaction can compromise joint integrity.