DIN 25201 Wedge Lock Washers | Hardened Carbon Steel | Phosphate Black Finish
PRODUCT PARAMETERS
Wedge-Lock Security: DIN 25201 technology utilizes tension instead of friction to ensure 100 percent vibration resistance under extreme dynamic loads.
High-Tensile Compatibility: Precision hardened spring steel construction (HV 465 plus) specifically designed for Grade 8.8, 10.9, and 12.9 bolt connections.
Phosphate Black Engineering: Specialized surface coating provides stable friction coefficients and consistent torque-tension ratios for industrial assembly.
Error-Proof Pre-Assembly: Pairs are pre-assembled and glued to guarantee correct wedge cam orientation, significantly reducing installation time and risk.
Certified Anti-Vibration: Fully compliant with DIN 25201 standards and validated by Junker vibration testing (DIN 65151) to prevent spontaneous loosening.
High-performance DIN 25201 carbon steel wedge lock washers with phosphate black coating. Surface hardened to HV 465 plus for maximum vibration resistance with Grade 8.8, 10.9, and 12.9 bolts.
Dimensions
Data Overview
Size (Metric)
Inner Dia (d1) [mm]
Outer Dia (d2) [mm]
Thickness (T) [mm]
Weight [kg/1000pcs]
M6
6.5
10.8
1.8
0.8
M8
8.7
13.5
2.5
1.7
M10
10.7
16.6
2.5
2.5
M12
13.0
19.5
2.5
3.5
M16
17.0
25.4
3.4
7.3
M20
21.4
30.7
3.4
11.0
M24
25.3
39.0
3.4
20.0
M30
31.4
47.0
6.6
45.0
Product Features & Engineering Logic
Key Feature
Technical Specification
Operational Benefit (Trust Driver)
Wedge Cam Logic
Cam Angle (Alpha) is greater than Thread Pitch (Beta).
Prevents bolt rotation by increasing tension if loosening is attempted.
Material Strength
High-grade Spring Steel (Heat Treated).
Maintains structural integrity and bite under high clamping forces.
Surface Treatment
Phosphate Black (Phosphated).
Provides essential dry-film lubrication and basic industrial corrosion protection.
External Serrations
Precision radial grip teeth.
Ensures high-friction contact with both the bolt head and the workpiece surface.
FAQs
Q1: Why is phosphate black finish important for these washers?
For high-hardness spring steel, phosphate black offers a stable friction coefficient without the risk of hydrogen embrittlement often found in electro-plating, ensuring safe use with 12.9 grade bolts.
Q2: Can I use DIN 25201 washers on slotted or oversized holes?
For such applications, we recommend using our SP (Large Outer Diameter) series to ensure sufficient surface contact and load distribution.
Product Attributes
Property
Details
Industry
Industrial Fastener
Brand Name
XLUIG (Kunshan Xinluan New Material Technology Co., Ltd)
Place of Origin
Jiangsu, China
Certificate
ISO 9001:2015 Certified
Thread Size
Customized sizes available
MOQ
5,00 Pieces
OEM / ODM
Support (Based on technical drawings)
Samples
Available upon request
Supply Ability
Service Items
Details & Specifications
Packaging
Small boxes, plastic bags, bulk cartons, and wooden pallets
