Product Introduction
The DIN 127 Spring Washer is a helical washer designed to maintain preload in bolted assemblies and prevent loosening under vibration, dynamic loads, or thermal expansion.
Technical Specifications
| Parameter | Details |
| Product Name | DIN 127 Spring Washer |
| Standard | DIN 127 |
| Product Category | Spring Washer |
| Alternative Name | Split Lock Washer |
| Structure | Split Helical Design |
| Locking Method | Elastic Spring Action |
| Nominal Size Range | M2–M20 |
| Materials | Carbon Steel |
| Stainless Steel A2 | |
| Stainless Steel A4 | |
| Surface Finishes | Zinc Plated |
| Black Oxide | |
| Hot Dip Galvanized |
Standard Dimensions
| Thread Size | d1 (mm) | d2 (mm) | s (mm) |
| M2 | 2.1 | 4.1 | 0.5 |
| M4 | 4.3 | 7.6 | 1 |
| M6 | 6.4 | 11.8 | 1.6 |
| M8 | 8.4 | 14.8 | 2 |
| M10 | 10.5 | 18.1 | 2.5 |
| M12 | 12.5 | 21.1 | 3 |
| M16 | 16.5 | 28.2 | 3.5 |
| M20 | 20.5 | 34.5 | 4 |
How It Works
The helical ends generate elastic tension, maintaining consistent contact pressure between the fastener head and mating surface.
This tension increases friction, reducing the risk of loosening under vibration, shock, and dynamic loads.
The geometry accommodates minor material deformation and thermal expansion while preserving consistent joint contact.
Typical Applications
DIN 127 spring washers are commonly used in bolted assemblies where resistance to vibration-induced loosening is required. Typical applications include:
Machinery and equipment assembly
Automotive and transportation components
Steel structures and metal fabrication
Electrical enclosures and mounting systems
General industrial fastening applications
Manufacturing & Quality Control
Verification of helical profile and split geometry.
Dimensional inspection for inner diameter, outer diameter, and thickness.
Material confirmation for carbon steel or stainless steel (A2/A4).
Surface finish inspection for zinc plating, black oxide, and hot-dip galvanizing.
Packaging & Supply Capability
Packaged in small boxes, cartons, or pallets according to order specifications.
Supports bulk and OEM packaging.
Global shipping available with standard minimum order quantities; lead times depend on order volume.
FAQ
Q: How should the correct DIN 127 spring washer size be selected?
A: The washer size should match the nominal diameter of the bolt or screw in the assembly to ensure proper fit and effective locking performance.
Q: Can DIN 127 spring washers be reused after removal?
A: Inspect the washer before reuse. If permanent deformation, wear, or damage is observed, replacement is recommended to maintain the intended locking function.
Q: Are DIN 127 spring washers interchangeable with other lock washer standards?
A: Not necessarily. Different standards may have varying dimensions, geometries, or locking characteristics. Compatibility should be confirmed against engineering drawings or project requirements.
Q: What information should be provided when requesting a quotation?
A: Include the required standard, size, material, surface finish, quantity, and any special packaging or specifications to ensure an accurate quotation.
Q: Can DIN 127 spring washers be supplied with different surface finishes based on project requirements?
A: Yes. Material and surface finish combinations can be tailored to project specifications, environmental exposure, and fastener compatibility.
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