Value Collection R52000342 Split Lock Washer 316 Ss

Product Description

The VALUE COLLECTION R52000342 is a No. 4 screw split lock washer machined from 316 stainless steel with a bright, uncoated finish. Split lock washers work by biting into the mating surface and the fastener bearing face under torque load, resisting loosening from vibration and thermal cycling. This washer measures 0.114 to 0.120 inches inside diameter, 0.209 inches outside diameter, and 0.025 inches thick. Hardness is rated at 35 to 43 HRC. It conforms to ASME B18.21.1 and SAE J405 dimensional standards. Maintenance technicians, pipefitters, and industrial service professionals install these where corrosion resistance is required in addition to reliable fastener retention.

This washer is sized for No. 4 screws and is suited to applications where 316 stainless steel alloy is specified for superior chloride and chemical resistance compared to 304 stainless. Typical install environments include marine hardware, food-processing equipment, chemical processing assemblies, pool and spa mechanical enclosures, and corrosive-atmosphere HVAC or plumbing panel assemblies. The uncoated bright finish is compatible with most stainless fastener assemblies without introducing galvanic concerns when paired with 316 stainless hardware.

Key Features

• 316 stainless steel construction for elevated corrosion and chloride resistance
• Hardness range of 35 to 43 HRC provides reliable spring tension and bite under load
• Uncoated bright finish — no plating to flake or contaminate sensitive assemblies
• Conforms to ASME B18.21.1 and SAE J405 dimensional standards
• Inside diameter range of 0.114 to 0.120 inches fits No. 4 screw shanks with standard tolerance

Compatibility

Designed for use with No. 4 screws in inch-measurement fastener assemblies requiring ASME B18.21.1 compliant split lock washers.

Installation Notes

Install with the split gap facing away from any sealing surface to maximize bite effectiveness. Always power down or de-energize electrical panels before servicing any fastened assemblies inside enclosures. Use appropriate stainless-compatible tools to avoid carbon contamination that can initiate corrosion on 316 stainless components. Verify fastener and mating surface material compatibility to prevent galvanic corrosion in wet or immersed service conditions.