Product Overview
The three primary functions of stainless steel locking washers are anti-loosening, load-bearing, and compatibility. The open-style design utilizes elastic deformation to generate preload, thereby increasing friction. The toothed design (internal teeth, external teeth, and double-sided teeth) forms a mechanical lock by engaging the teeth into the contact surface. The tooth height and pitch are precisely calculated to ensure a secure grip without damaging the surface of the connected components. The double-stacked style consists of two washers with their inner beveled surfaces facing each other. By utilizing tension instead of friction, it achieves a more pronounced wedging and locking effect, making it suitable for high-vibration environments.
Product Specifications
- Product Name: Blackened Spring Washers, Blackened Spring Washers, Blackened Open Spring Washers
- Standards: DIN 127 / GB/T 93
- Material: 65Mn Spring Steel
- Surface Treatment: Blackened (Black Oxide Treatment)
- Structure: Open-type spring washers, used for bolt and nut anti-loosening
Product Features
- 65Mn: High elasticity and excellent anti-loosening performance: Made from spring steel, these washers offer ample elasticity and good toughness, effectively preventing nuts from loosening or stripping under vibrating conditions.
- Blackened for rust prevention, wear-resistant, and non-reflective: The surface undergoes an oxidation blackening process to form a dense protective layer that resists rust, wear, and glare, making it suitable for use inside equipment and mechanical structures.
- High hardness, resistant to deformation and breakage: These stainless steel locking washers undergo heat treatment to ensure uniform hardness, making them resistant to flattening or breaking even after long-term use, and highly reliable.
- Standardized and versatile: Available in a full range of DIN and GB (Chinese National Standard) sizes, compatible with blackened bolts, high-strength bolts, and Grade 8.8 / Grade 10.9 bolts.
- Cost-effective and easy to install: Ideal for large-scale mechanical assembly, equipment maintenance, and steel structure installation.
Applications
- Internal fastening in machine tools, mechanical equipment, electric motors, fans, and pump housings
- Assembly of automobiles, agricultural machinery, and construction machinery
- Molds, hydraulic equipment, and transmission mechanisms
- Black fasteners for applications requiring a uniform finish
- Indoor equipment and mechanical structures unsuitable for galvanized environments
Table of Common Sizes (DIN 127 / GB/T 93) (Unit: mm)
|
Specifications |
Inner Diameter d |
Outer Diameter D |
Thickness t |
|
M3 |
3.2 |
6 |
0.8 |
|
M4 |
4.3 |
8 |
1.0 |
|
M5 |
5.3 |
10 |
1.2 |
|
M6 |
6.4 |
12 |
1.6 |
|
M8 |
8.4 |
16 |
2.0 |
|
M10 |
10.5 |
20 |
2.5 |
|
M12 |
13.0 |
24 |
3.0 |
|
M14 |
15.0 |
27 |
3.5 |
|
M16 |
17.0 |
30 |
4.0 |
|
M20 |
21.0 |
37 |
5.0 |
|
M24 |
25.0 |
44 |
6.0 |
FAQ
1. How do I choose the right washer size?
When selecting a washer, it must match the bolt specifications: the inner diameter should be slightly larger than the bolt diameter; the outer diameter should be chosen based on the installation space and the magnitude of the applied force; and the thickness should be selected according to pressure and clearance requirements. If you are unsure about the size, please provide the bolt specifications, and we will match you with the appropriate washer free of charge.
2. What surface treatments are available for washers?
Common surface treatments include: electrogalvanizing, hot-dip galvanizing, blackening, phosphating, stainless steel passivation, Dacromet, and Jumeite, as well as other high-corrosion-resistant treatments.
3. How is the quality of the washers guaranteed?
Full-process quality control: raw material inspection, dimensional accuracy testing, hardness and elasticity testing, salt spray testing, and 100% final inspection before shipment to ensure no burrs or deformation.
4. What is the minimum order quantity for washers?
Standard washers: Minimum order quantity is generally 50kg–100kg; trial orders are negotiable.
Custom washers: Minimum order quantity is typically 100kg, depending on the complexity of the specifications.
Large-volume orders qualify for wholesale pricing and priority production.
5. What is the production lead time?
Standard stock items: Shipment within 3–7 days.
Custom washers: 10–20 days after receipt of prepayment.
Rush orders can be arranged for expedited production.
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