NSI Industries JLWHA178 - Split Lock Washer, 7/16 in., Alloy Steel, Zinc Chromate finish, 100 per pack, Yellow, For use with Grade 5 & Grade 8 Alloy Steel.
NSI Industries

JLWHA178

Alternate Item Number: 20178

UPC: 639720201789

Contact for Pricing

Minimum Qty: 100

Multiplier: 100

*Contact for lower quantities*

Overview

The NSi Industries JLWHA178 Split Lock Washer is a precision-engineered fastening component designed for heavy-duty industrial applications requiring Grade 5 or Grade 8 alloy steel fasteners. Constructed from high-strength alloy steel, this 7/16-inch split lock washer provides critical vibration resistance and secure joint integrity in dynamic load conditions. The zinc chromate finish delivers enhanced corrosion protection, extending service life in harsh environments including automotive, construction, and heavy machinery sectors. Key specifications include a 7/16-inch nominal size (0.4375" ID x 0.812" OD x 0.093" thickness) with a split design that creates tension when compressed, preventing fastener loosening under vibration. The yellow color coding indicates zinc chromate plating, which offers superior corrosion resistance compared to plain steel washers. Each pack contains 100 units, optimized for bulk industrial procurement and just-in-time inventory systems. Compatibility is explicitly rated for use with Grade 5 (minimum 120,000 PSI tensile strength) and Grade 8 (minimum 150,000 PSI tensile strength) alloy steel fasteners, making this washer suitable for critical applications where joint integrity cannot be compromised. The split configuration ensures consistent spring tension across the joint interface, maintaining clamp load even under cyclic loading conditions. Typical applications include engine assembly, structural connections in construction equipment, heavy machinery frame joints, and any high-stress mechanical assembly where vibration-induced loosening must be prevented. The alloy steel construction provides temperature stability from -40°F to 250°F (-40°C to 121°C), maintaining mechanical properties across a wide operating range. For procurement teams, the JLWHA178 offers reliable availability from NSi Industries, a US-based manufacturer with a reputation for consistent quality control in industrial fasteners. The zinc chromate finish meets ASTM B633 specifications for corrosion resistance, providing 500+ hours of salt spray resistance per ASTM B117 testing protocols.
  • 7/16" (0.4375" ID) alloy steel split lock washer for Grade 5 & 8 fasteners
  • Zinc chromate finish (yellow) provides 500+ hours salt spray resistance
  • 0.093" thickness with split design for consistent vibration resistance
  • Packaged 100 per box for bulk industrial procurement
  • US-manufactured by NSi Industries with ASTM B633 compliance

Specifications

Type
Lock Washer
Package Dimensions (L x W x H)
3 IN x 3 IN x 2.15 IN
Package Dimensions (L x W x H)
7.62 cm x 7.62 cm x 5.461 cm
Package Weight (Imperial)
0.960 L
Package Weight (Metric)
0.435 kg
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40537J

A split lock washer made of steel with a zinc plated finish. It has an inside diameter of 0.45 in, an outside diameter of 0.776 in, and a thickness of 0.109 in. The washer is silver in color and has Rockwell hardness C38-43.
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