DIN25201 - 304 Stainless Steel - Grade A - Natural Color
Product Details
Product Name: Yongjing Stainless Steel Double Stack Self-Locking Washer
Technical Standard: DIN25201
Product Grade: Grade A
Material: 304 Stainless Steel
Surface Treatment: Natural Color
Product Type: Double Stack Self-Locking Washer
Product Specifications
Detailed product specifications can be provided according to customer requirements, including inner diameter, outer diameter, thickness, tooth size and other key parameters.
Product Description
Product Overview
This product is a stainless steel double stack self-locking washer complying with the DIN25201 standard, precision-manufactured from 304 stainless steel. The washer is composed of two independent upper and lower elastic washers stacked together, and each washer is equipped with mutually misplaced radial protrusions (or serrations). Under the action of bolt preload, the protruding tooth surfaces of the two washers engage with each other and embed into the surface of the connected parts. At the same time, their elastic deformation generates continuous axial tension. Through the dual effects of mechanical locking and elastic compensation, an excellent anti-loosening effect is achieved, especially suitable for harsh working conditions subject to strong vibration or impact loads.
Core Advantages
-
Double Self-Locking Anti-Loosening: The combination of mechanical tooth surface engagement and elastic tension compensation provides far more anti-loosening reliability than a single elastic washer.
-
Excellent Vibration and Impact Resistance: The unique double stack design can effectively resist loosening caused by strong vibration, alternating loads and impacts.
-
High Strength and Corrosion Resistance: 304 stainless steel material ensures high strength and excellent corrosion resistance, suitable for various harsh environments.
-
Convenient Installation and Reusability: It can be reused after installation within the recommended torque, making maintenance convenient.
Applicable Industries
-
Heavy-Duty Power and Construction Machinery: High-vibration key connections such as diesel engines, construction machinery chassis, and mining crushing equipment.
-
Rail Transit and Aerospace: High-reliability anti-loosening parts such as railway vehicle bogies, aero-engine accessories, and spacecraft structural parts.
-
Energy and Power Equipment: Dynamic load-bearing connections such as wind turbine main shafts, gas turbine casings, and high-voltage power transmission equipment.
-
High-End Equipment Manufacturing: High-precision transmission connections requiring zero loosening such as precision machine tool spindles, industrial robot joints, and large printing machinery.
-
Marine and Offshore Engineering: Fastening points subject to vibration and corrosive environments such as marine engines, deck machinery, and offshore platform equipment.
-
Chemical and Heavy-Duty Valves: Connections with strong pulsating impact such as large reactor agitators, high-pressure valve flanges, and reciprocating compressors.
-
National Defense and Special Vehicles: Occasions with extremely high requirements for fastening reliability such as tank and armored vehicles, military equipment brackets, and special engineering vehicles.
Warm Tips
-
During installation, ensure the correct direction of the washer (usually the side marked "TOP" faces the nut) and tighten it to the specified torque at one time.
-
The connected surface should have sufficient hardness (usually ≥200HV is recommended) to ensure that the tooth surface can be effectively embedded and form a reliable lock.
-
In key safety applications or extreme working conditions, it is recommended to conduct actual vibration tests to verify its anti-loosening performance.
