Acorn LW38J Split Lock Washer 3/8 Inch Jar

Product Description

The ACORN LW38J is a 3/8-inch split lock washer sold in jar quantity. Split lock washers are used in bolted assemblies to resist loosening caused by vibration and torque relaxation. The spring action of the split ring bites into both the fastener bearing surface and the mating material, maintaining clamp load over time. This type of hardware is a standard component in mechanical, HVAC, electrical, and plumbing installations wherever a threaded fastener needs to stay secure under dynamic or thermal cycling conditions.

Split lock washers in the 3/8-inch size are commonly used with 3/8-inch bolts and screws across a wide range of trade applications. Typical install scenarios include equipment mounting, pipe hanger assemblies, electrical panel and junction box hardware, and HVAC unit fastening. The jar packaging makes this item well-suited for service vehicles, shop stock, and job-site use where individual fastener quantities are consumed regularly.

Key Features

• 3/8-inch split lock washer design resists loosening under vibration and thermal cycling
• Jar packaging supports bulk use and convenient shop or truck stock
• Standard split-ring profile compatible with common 3/8-inch fastener assemblies
• Lightweight at 0.68 pounds per jar for easy handling and storage

Compatibility

Designed for use with standard 3/8-inch threaded fasteners in mechanical, HVAC, plumbing, and electrical applications.

Installation Notes

Split lock washers are installed between the fastener head or nut and the mating surface before final torque is applied. Ensure the split ends seat properly against both surfaces to achieve the intended spring-load effect. Always de-energize electrical systems or shut off mechanical equipment before servicing fastened assemblies in live installations. Installation should follow applicable codes such as the NEC for electrical work or the IFGC and IPC for mechanical and plumbing systems.

Technical Specifications

• Size: 3/8 inch
• Package Type: Jar
• Weight: 0.68 pounds
• UPC: 78103556033

Standard Information

• Brand: ACORN
• Manufacturer Part Number: LW38J