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DIN 980V All Metal Toplock A2

DIN 980V All-Metal Prevailing Torque Lock Nut — A2 Stainless Steel (SUS304)

FULLERKREG DIN 980V all-metal prevailing torque type hex lock nuts are manufactured to DIN 980V and ASME B18.16.3M standards. The top-locking design distorts the top threads to create a permanent prevailing torque without any nylon insert, making them suitable for high-temperature and vibration-intensive applications.

Product Overview

Parameter Details
Standard DIN 980V / ASME B18.16.3M
Type All-Metal Prevailing Torque Hex Lock Nut (Top-Locking / Volcano Type)
Material SUS304 Stainless Steel (A2)
Grade A2-70
Surface Treatment Passivated (洗白钝化)
Thread Metric Coarse Thread (6H)
Size Range M6 – M20
Hardness Rockwell C26–C36
RoHS Compliant Yes
Brand FULLERKREG

Dimensional Data (DIN 980V)

All dimensions in millimeters (mm). Unit weight is approximate reference value.

Nominal Size Thread Pitch (mm) s Max (mm) s Min (mm) e Min (mm) m Max (mm) m Min (mm) Unit Weight (g/pc)
M6 1.00 10.00 9.78 11.05 5.0 4.4 ≈2.0
M8 1.25 13.00 12.73 14.38 6.5 5.8 ≈4.5
M10 1.50 17.00 16.73 18.90 8.0 7.2 ≈8.5
M12 1.75 19.00 18.67 21.10 10.0 9.0 ≈13
M16 2.00 24.00 23.67 26.75 13.0 12.0 ≈28
M20 2.50 30.00 29.16 32.95 16.0 15.0 ≈55

* s = Width Across Flats  |  e = Width Across Corners  |  m = Nut Height  |  Unit weight values are approximate for reference only.

Prevailing Torque Requirements (DIN 980V)

The prevailing torque is the resistance torque generated by the deformed top threads. DIN 980V specifies minimum and maximum prevailing torque values to ensure reliable locking performance.

Size Min Prevailing Torque (N·m) Max Prevailing Torque (N·m) Min Proof Load (kN)
M6 0.5 3.0 10.2
M8 1.0 6.0 18.7
M10 1.5 9.0 29.5
M12 2.5 14.0 43.2
M16 5.0 28.0 80.6
M20 8.0 45.0 127.0

Material & Mechanical Properties

Property Specification
Material Grade SUS304 / A2 Stainless Steel
Tensile Strength ≥ 700 MPa
Proof Load Stress 580 MPa
Hardness Rockwell C26–C36
Corrosion Resistance Excellent — suitable for marine, chemical, and outdoor environments
Temperature Range -196°C to +300°C (no nylon insert, all-metal construction)
Chemical Composition C ≤ 0.08%, Mn ≤ 2.0%, Si ≤ 1.0%, Cr 18–20%, Ni 8–10.5%, S ≤ 0.03%, P ≤ 0.045%

Selection Guide

Application Scenario Recommended Size Key Reason
Automotive / Machinery (vibration) M8 – M16 High prevailing torque, no loosening under vibration
Marine / Outdoor Structures M6 – M20 A2 SUS304 excellent salt-spray corrosion resistance
High-Temperature Environments M6 – M20 All-metal, no nylon — rated up to 300°C
Food / Pharmaceutical Equipment M6 – M12 SUS304 non-toxic, easy to clean, corrosion-resistant
Electrical / Electronics Enclosures M6 – M10 Non-magnetic A2, no interference with sensitive components

Standard Notes

  • DIN 980V specifies the Volcano-type (top-locking) all-metal prevailing torque hex nut for metric coarse threads.
  • The locking mechanism is achieved by controlled deformation of the top 2–3 threads — no insert required.
  • Nuts are reusable but prevailing torque may decrease after repeated use; replace if torque falls below minimum specification.
  • Thread tolerance: 6H per ISO 965-1.
  • Passivation treatment enhances corrosion resistance and removes free iron from the surface.
  • Compatible bolt grade: A2-70 or higher recommended.

Product Gallery

DIN 980V A2 Stainless Steel All-Metal Lock Nut — actual product photos:

[Photo 1] [Photo 2] [Photo 3] [Photo 4]

Why Choose FULLERKREG

🏭 Direct Manufacturer — Factory-direct pricing with full production traceability.
📐 Strict Dimensional Control — 100% inspection against DIN 980V tolerances.
🔬 Material Certification — Mill test reports and RoHS certificates available on request.
🌊 Corrosion Tested — Salt spray tested per ISO 9227 standard.
📦 Flexible MOQ & Packaging — Bulk bags, boxes, or custom retail packaging available.
🚢 Global Shipping — FBA-ready export packaging, direct China-to-warehouse shipping.
⚙️ OEM Services — Custom marking, packaging, and certification documentation supported.

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