DIN982 Lock Nut Nylon Insert Hex Self Locking Nuts

‌DIN 982‌ is a standard established by the German Institute for Standardization (DIN) for non-metallic insert lock nuts (thick type), widely used in machinery, automotive, construction, and other industries. Below is a consolidated summary of key information:

‌I. Basic Standard Information‌

• ‌Standard Name‌: Non-metallic insert lock nuts, thick.

• ‌Current Version‌: DIN 982-1987, applicable to metric thread specifications.

• ‌Core Function‌: Utilizes non-metallic inserts (e.g., nylon rings) to achieve vibration-resistant locking, ideal for fastening in high-vibration environments.

‌II. Structural Design Features‌

1. ‌Non-Metallic Insert‌

• Typically made of nylon, the insert has an inner diameter slightly smaller than the thread pitch diameter. It deforms under compression to fill thread gaps, increasing frictional resistance for anti-loosening.

• The locking ring is positioned at the top or middle of the nut, with single or dual inserts depending on the specification.

2. ‌Dimensional Characteristics‌

• ‌Thickness‌: Classified as "thick nuts," with a height (m) significantly greater than standard hex nuts (e.g., M10 nuts have a minimum height of 8.04 mm).

• ‌Hexagonal Profile‌: Across-flats width (s) and flange diameter (dw) align with standard hex nut dimensions (e.g., M12 nuts have an across-flats width of 19 mm and flange diameter of 17.4 mm).

‌III. Specifications & Parameters‌

1. ‌Thread Size Range‌

• Covers ‌M5-M24‌ metric coarse and fine threads.

• Coarse thread pitch range: ‌0.8-3 mm‌; fine thread pitch varies by size (e.g., M10 fine thread pitch is 1.5 mm).

2. ‌Key Dimensional Parameters (Unit: mm)‌

‌IV. Materials & Surface Treatments‌

• ‌Base Materials‌: Carbon steel, stainless steel (e.g., 304/316).

• ‌Surface Treatments‌: Plain, blue/white zinc, color zinc, black zinc, Dacromet, etc., for corrosion resistance.

• ‌Strength Grades‌: Available in 4, 8, 10, and 12 grades to meet diverse load requirements.

‌V. Applications‌

• ‌Industrial Machinery‌: Vibration-prone equipment, motors, pumps, and valves.

• ‌Automotive‌: Critical components like chassis and engine assemblies.

• ‌Construction‌: Structural steel connections and heavy equipment installations.