Home » High Nylon Locking Nuts (DIN 982) - Zinc Plated Low Carbon Steel (Class 4)

High Nylon Locking Nuts (DIN 982) - Zinc Plated Low Carbon Steel (Class 4)

High Nylon Locking Nuts — DIN 982 | Zinc Plated Low Carbon Steel (Class 4)

FULLERKREG DIN 982 High Nylon Insert Lock Nuts in zinc-plated low carbon steel (Class 4) deliver reliable vibration-resistant locking at an economical cost. The high-profile (Type P) hexagon body incorporates a non-metallic nylon insert that deforms around the bolt thread upon engagement, generating consistent prevailing torque without adhesives or secondary locking features. Manufactured from Q195 low carbon steel with a trivalent chromium zinc plating (Zinc CR3), these nuts offer solid corrosion protection for general industrial and construction applications while meeting RoHS environmental compliance requirements.

Standard: DIN 982 (ref. ISO 7042)  |  Material: Low Carbon Steel Q195  |  Surface: Zinc Plated CR3 (Trivalent Chromium)  |  Property Class: Class 4

Dimensional Data

Thread
d		 Pitch
(mm)		 Width Across Flats
s (mm)		 Width Across Corners
e (mm)		 Nut Height
m (mm)		 Nylon Insert
Thickness
t (mm)		 Unit Weight
(g/pc)
min max min max min max
M5 0.8 7.78 8.00 8.63 8.79 6.14 6.50 2.4 1.4
M6 1.0 9.78 10.00 10.89 11.05 7.14 7.50 2.4 2.4
M8 1.25 12.73 13.00 14.20 14.38 9.14 9.50 2.8 5.3
M10 1.5 15.73 16.00 17.59 17.77 11.14 11.50 3.0 9.2
M12 1.75 17.73 18.00 19.85 20.03 13.40 14.00 3.5 14.0
M14 2.0 20.67 21.00 23.16 23.36 15.40 16.00 3.5 20.5
M16 2.0 23.67 24.00 26.75 26.75 17.40 18.00 4.0 29.0
M18 2.5 26.16 27.00 29.56 30.14 19.40 20.00 4.0 40.5
M20 2.5 29.16 30.00 32.95 33.53 21.40 22.00 4.5 55.0
M22 2.5 31.61 32.00 35.03 36.01 23.40 24.00 4.5 70.5
M24 3.0 35.00 36.00 39.55 40.13 25.40 26.00 5.0 91.0

* Dimensions per DIN 982 / ISO 7042. Unit weights are reference values for Q195 carbon steel (density ≈ 7.85 g/cm³) including zinc plating. Actual weights may vary slightly by batch.

Mechanical Properties

Property Value
Material Low Carbon Steel Q195
Property Class Class 4 (per DIN 982)
Proof Load Stress Per DIN 982 / ISO 7042 Class 4
Hardness HRB 70–90 (typical for Class 4)
Nylon Insert Material Polyamide (PA6 / Nylon 6)
Max Operating Temp (Nylon) ≤ 120°C (continuous); ≤ 150°C (short-term)
Surface Treatment Zinc Plated — Trivalent Chromium CR3 (RoHS compliant)
Zinc Plating Thickness ≥ 5 μm (standard); ≥ 8 μm available on request
Salt Spray Resistance ≥ 72 hours (white rust per ISO 9227)
RoHS Compliant Yes — Cr3 trivalent chromium, no hexavalent chromium (Cr6)

Prevailing Torque Performance

Thread Min Prevailing Torque (N·m) Max Prevailing Torque (N·m) Min Proof Load (kN)
M5 0.08 0.60 5.6
M6 0.10 0.90 8.0
M8 0.20 1.50 14.5
M10 0.30 2.50 23.0
M12 0.50 4.00 33.5
M14 0.80 6.00 45.5
M16 1.00 8.00 60.0
M20 1.50 12.00 95.0
M24 2.50 20.00 140.0

* Prevailing torque values per DIN 982 / ISO 7042 for new nuts on first assembly. Class 4 proof loads are lower than stainless grades.

Surface Treatment — Zinc CR3 Explained

Feature Zinc CR3 (This Product) Zinc CR6 (Legacy / Restricted) Plain / Uncoated
Chromate Type Trivalent Cr3 ✅ Hexavalent Cr6 ❌ (RoHS restricted) None
RoHS Compliant ✅ Yes ❌ No ✅ Yes
Salt Spray (white rust) ≥ 72 hrs ≥ 96 hrs < 24 hrs
Appearance Bright silver / slight blue tint Yellow iridescent Bare steel grey
EU / RoHS Export ✅ Fully compliant ❌ Restricted ✅ Compliant
Typical Use General industrial, construction, automotive Legacy / phased out Indoor / dry environments only

Selection Guide — DIN 982 vs DIN 985 (High vs Low Type)

Feature DIN 982 (High Type) DIN 985 (Low Type)
Nut Height Higher profile (~1.0× thread dia.) Lower profile (~0.8× thread dia.)
Prevailing Torque Higher — better vibration resistance Standard
Reusability Limited (nylon deforms after 1st use) Limited (nylon deforms after 1st use)
Space Constraint Standard clearance required Suitable for tight axial space
Typical Application Heavy vibration, structural joints General locking, light assemblies
ISO Equivalent ISO 7042 ISO 10511

Material Grade Comparison — Which Class to Choose?

Grade Class 4 — Zinc Plated (This Product) A2 — Stainless Steel A4 — Marine Stainless
Material Q195 Low Carbon Steel SUS304 SUS316
Corrosion Resistance Moderate (zinc plated) Good Excellent
Strength Class 4 A2-70 A4-70
Cost ★ Most economical ★★ Mid-range ★★★ Premium
Best For General industrial, construction, dry/indoor Outdoor, food, light corrosion Marine, chemical, offshore
RoHS ✅ CR3 compliant ✅ ✅

Standard & Compliance

DIN 982 specifies metric prevailing torque hexagon nuts with a non-metallic insert — high type. The standard covers thread sizes M5 through M24 with property classes 4, 6, 8, and 10. Although DIN 982 has been superseded by ISO 7042, the dimensional requirements are fully interchangeable. FULLERKREG manufactures to the current ISO 7042 standard with DIN 982 cross-reference documentation available upon request. All zinc plating uses trivalent chromium (CR3) passivation in full compliance with RoHS Directive 2011/65/EU.

  • ✅ DIN 982 / ISO 7042 compliant
  • ✅ Material: Q195 low carbon steel with mill certificates available
  • ✅ Zinc CR3 plating — RoHS & REACH compliant, no Cr6
  • ✅ Salt spray tested per ISO 9227
  • ✅ Batch traceability with lot numbers

Typical Applications

  • 🏗️ Construction & structural steel assemblies
  • 🚗 Automotive body & chassis components
  • 🔧 General machinery & equipment manufacturing
  • ⚡ Electrical enclosures & panel assemblies
  • 🚦 Transportation infrastructure — guardrails, signage, bridges
  • 🏠 HVAC systems & building services
  • 📦 Furniture & shelving systems requiring vibration locking

Product Gallery

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⚙️ Why FULLERKREG

🏭 Direct Manufacturer — No middlemen. Factory-direct pricing with full production traceability.
📐 Precision to Standard — Every batch dimensionally verified against DIN 982 / ISO 7042 gauging.
🔩 Wide Size Range — M5 to M24 in stock; custom sizes and non-standard threads available on request.
📦 Flexible MOQ — Bulk packing (1,000–50,000 pcs/bag) or retail packaging available.
✅ RoHS CR3 Zinc Plating — Trivalent chromium passivation; fully compliant for EU and global export.
📋 Full Documentation — Mill certificates, RoHS declarations, salt spray reports, and dimensional inspection on request.
🚢 Global Shipping — Export experience to EU, North America, Southeast Asia, Middle East, and Oceania markets.

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