SystemShield 1/4" Split Lock Washer

1/4 in Split Lock Washer

Short Description

Steel 1/4 in split lock washer for machine-fastened assemblies requiring added spring tension against loosening. Matching listings show zinc-plated steel, ASME B18.21.1 dimensional standard, 1/4 in screw size, about 17/64 in max inside diameter, about 31/64 in max outside diameter, and about 1/16 in thickness for this size class.

Product Overview

The SystemShield 1/4 in Split Lock Washer is a spring-type locking washer intended for use in bolted and machine-fastened assemblies where added resistance to backing-off from mild vibration or joint relaxation is required. Split lock washers are semi-coiled washers with an opening where one side rises above the other; when compressed, they push back against the mating surfaces to help resist loosening.

For the 1/4 in size class, matching listings show a steel washer with zinc-plated finish, sized for 1/4 in screw/bolt hardware and built to ASME B18.21.1. Matching dimensional data shows about 0.252 to 0.260 in inside diameter on one listing, or 1/4 in min to 17/64 in max inside diameter on another. Outside diameter is shown at about 0.489 in max or 31/64 in max, and thickness is shown at about 1/16 in.

This washer format is commonly used under a nut or bolt head in a stacked hardware joint where a basic lock-washer function is desired along with compatibility with standard 1/4 in hardware systems.

Key Features

• Sized for 1/4 in screw and bolt hardware
• Split lock washer spring-type geometry
• Provides added spring tension in bolted stack-ups
• Zinc-plated steel construction in matching listings
• ASME B18.21.1 dimensional standard reference
• About 0.252 to 0.260 in inside diameter on matching listings
• About 0.489 in max outside diameter / 31/64 in max on matching listings
• About 1/16 in thickness for this size class

Technical Specifications

What’s Included

• (1) 1/4 in split lock washer
• No bolt included
• No nut included
• No flat washer included

Typical Applications

• Bracket mounting assemblies
• Cabinet hardware fastening
• Enclosure assembly fastening
• Bonding hardware stack-ups using separate bolt and nut hardware
• General machine-thread fastening where 1/4 in hardware is specified
• Equipment mounting points where added spring tension is desired in the joint

Compatibility

Compatible with:

• 1/4"-20 × 1 in Hex Head Bolt
• 1/4"-20 Hex Nut
• Compatible hardware stack-ups sized for 1/4 in bolts and nuts
• SystemShield Standard Mounting Hardware Kit, where this washer is a primary included hardware component
• Bolted assemblies requiring basic split-lock spring tension in addition to the main clamping hardware

Not intended as:

• A flat washer substitute where load-distribution footprint is the primary requirement
• A substitute for a different hardware size where exact fit is required
• A standalone fastening solution without correct mating hardware

Installation Notes

1. Use this washer only with hardware sized for 1/4 in fasteners. Confirm that the washer’s inside diameter, outside diameter, and stack-up position are appropriate for the bolt, nut, and mounting surface in the actual joint design.
2. Install in the correct hardware stack-up for the application, typically under the nut or bolt head depending on the joint design.
3. Because split lock washers are general-use locking hardware, final torque and joint suitability should be determined by the actual mating materials, hardware arrangement, and application requirements.
4. Verify hardware size match, washer OD suitability, stack-up order, bolt and nut compatibility, and application requirements before installation.

Compliance & Regulatory Information

This product is described here as the current 1/4 in split lock washer dimensional class based on matching supplier listings. Those sources establish the dimensional class and material class, but they do not create a broader standalone certification claim beyond the washer style and dimensions actually listed.

It should be used only as part of a properly designed assembly and with hardware selected for the actual joint and environment.

Packaging & Handling

• Protect against deformation
• Protect against edge damage
• Protect against plating damage
• Protect against corrosion from improper storage conditions

Store in a clean, dry environment before installation. Do not use damaged washers with distorted shape or compromised spring form.

Notes / Limitations

This product is a fastening component, not a complete assembly.

• Final suitability depends on correct hardware size match
• Correct stack-up order is required
• Correct mating hardware is required
• Proper installation practices are required
• Actual application requirements must be verified