Stainless Steel Single Coil Spring Lock Washer With Square End
Specification
Stainless Steel Spring Lock Washers with Square Ends
PO JUN offers stainless steel single coil spring lock washers in 304 and 316 grades, with inch sizes from 1/8" to 1-1/2". The split, helical profile and square-cut ends distinguish this product from a plain flat washer.
Commonly called split lock washers, these components fit beneath a bolt head or nut in assemblies designed to use them. For buyers comparing a spring lock washer factory, matching the material and washer geometry to the approved joint design is more useful than selecting by nominal size alone.
Single Coil Design for Specified Bolted Assemblies
Split Profile with Offset Ends
The washer has a single opening and an axial height difference between its ends. It compresses as the joint is tightened, with its response depending on the material condition, section dimensions, and applied load.
Square-Cut Ends
“Square ends” describes the ends at the split—not the overall washer shape. This detail helps buyers distinguish the product from other end forms when matching drawings, existing parts, or purchasing descriptions.
Two Stainless Steel Grades
Both 304 and 316 are available across the listed size range. This gives buyers a material choice for different service environments while retaining the same product style.
Available Materials and Sizes
Materials: 304 stainless steel and 316 stainless steel
Available sizes for both grades:
| Available Sizes | |
|---|---|
| 304 | 1/8", 5/32", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-1/2" |
| 316 | 1/8", 5/32", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-1/2" |
These are nominal sizes. Confirm the actual inside diameter, outside diameter, section thickness, and free height against your drawing or specified standard.
Choose the Grade Around the Environment
304 stainless steel can be considered for general equipment and hardware assemblies where the exposure conditions suit the material.
316 stainless steel is often considered where chloride exposure is a greater concern. Its suitability still depends on temperature, chemical concentration, surface condition, and maintenance; it is not a guarantee against corrosion in every coastal or chemical environment.
If your existing drawing specifies a grade, keep that requirement in the inquiry. Material grade alone does not define washer hardness, spring response, or acceptable permanent deformation.
Match the Washer to the Joint
These washers can be sourced for equipment brackets, machinery components, fixtures, and maintenance assemblies that already specify a single coil spring washer.
Check the space around the bolt, the available bearing surface beneath the head or nut, and the effect of the washer ends on the component finish. Soft metals, plastics, and coated surfaces may require particular attention to indentation and surface damage.
For replacement purchasing, a sample or drawing helps distinguish washers with the same nominal size but different thicknesses or free heights.
A Clear View of Locking Performance
The name “spring lock washer” should not be taken as a guarantee against fastener loosening. Once compressed flat, the washer has limited remaining spring travel, and its presence alone does not establish resistance to vibration-induced loosening.
For joints exposed to sustained vibration, impact, or safety-critical loads, use a locking arrangement validated for the actual assembly. This keeps washer selection aligned with the joint’s performance requirements rather than relying on the product name.
Request a Quote from PO JUN
Send your nominal size, 304 or 316 grade, and order quantity. Attach a drawing, specified standard, or sample reference if the washer must match an existing assembly.
You can include several sizes in one inquiry, together with the destination country and requested delivery date. Add any packaging, labeling, material-document, or inspection requirements for quotation review.
Share your size list and part reference to discuss the spring washers for your next production or replacement order.
Frequently Asked Questions
Is a spring lock washer interchangeable with a flat washer?
No. A flat washer provides a flat bearing or spacing surface, while a split spring washer has a different shape and compression behavior. Follow the joint drawing rather than substituting by nominal size.
Can a spring lock washer be reused?
Do not assume it can. Permanent flattening, distortion, cracks, corrosion, or damaged ends may make it unsuitable for reuse. Follow the assembly’s replacement requirements.
Does a 1/2" washer have an exactly 1/2" inside diameter?
Not necessarily. The nominal size generally refers to the mating fastener size, while the actual hole includes clearance. Use the dimensional drawing for fit checks.
Can I identify 304 and 316 by appearance?
No. Their appearance can be similar. Specify the grade in the order and request the agreed material documentation when grade verification is required.