Minerallac 70535J 3/8 Inch 18-8 Ss Split Lock Washer

Product Description

The MINERALLAC 70535J is a 3/8-inch split lock washer manufactured from 18-8 stainless steel. Split lock washers are installed under nuts and bolt heads to resist loosening caused by vibration and torque relaxation. The helical split design bites into both the fastener and the mating surface, maintaining clamp load over time. The 18-8 stainless steel construction provides corrosion resistance suitable for wet, outdoor, and corrosive environments. Electricians, plumbers, HVAC technicians, and mechanical contractors use these washers when securing equipment, conduit supports, pipe hangers, and structural hardware where fastener retention and corrosion resistance are required.

This lock washer is used in a wide range of trade and light industrial applications including electrical panel and conduit installations, HVAC equipment mounting, plumbing support hardware, and general mechanical assemblies. It is suited for both indoor and outdoor use where stainless steel fastener hardware is specified for corrosion resistance or code compliance. Sold individually or in bulk quantities depending on order configuration.

Key Features

• 3/8-inch nominal size fits standard 3/8-inch fasteners
• 18-8 stainless steel construction for corrosion and rust resistance
• Split helical design maintains clamp load under vibration
• Suitable for outdoor, wet, and corrosive installation environments
• Compatible with standard 3/8-inch bolts, screws, and nuts

Compatibility

Designed for use with standard 3/8-inch bolts, cap screws, and nuts in mechanical, electrical, plumbing, and HVAC fastening applications requiring stainless steel hardware.

Installation Notes

Install the lock washer between the nut or bolt head and the mating surface with the split ends oriented to bite into both surfaces as the fastener is tightened. Stainless steel fasteners can be prone to galling — apply an anti-seize compound when pairing with stainless steel bolts or nuts. Follow applicable mechanical and electrical codes, including NEC requirements for hardware used in electrical installations. Verify fastener size compatibility before installation.

Technical Specifications

• Nominal Size: 3/8 inches
• Material: 18-8 Stainless Steel
• Type: Split Lock Washer
• Weight: 0.01 pounds
• UPC: 08593708193

Standard Information

• Brand: MINERALLAC
• Manufacturer Part Number: 70535J