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A2 Stainless Steel DIN 917 Cap Nut

A2 Stainless Steel DIN 917 Cap Nut — Low Profile Thin Pattern

FULLERKREG DIN 917 cap nuts (acorn nuts / dome nuts) are manufactured to the DIN 917 low-profile thin-pattern standard in A2 stainless steel (SUS304). With a passivated and pickled surface finish and A2-70 strength grade, these cap nuts deliver reliable corrosion resistance and a clean, finished appearance for exposed fastening applications across food processing, marine, architectural, and general industrial environments.

Product Specifications

Attribute Detail
Standard DIN 917
Type Low Profile Thin Pattern Cap Nut (Acorn Nut / Dome Nut)
Material A2 Stainless Steel (SUS304 / 1.4301)
Surface Treatment Passivated & Pickled (Bright Finish)
Strength Grade A2-70
Thread Type Metric Coarse Thread (ISO 68-1)
Size Range M3 – M20
Drive Type Hexagonal (Wrench / Spanner)

Dimensional Data (DIN 917 — Low Profile Thin Pattern)

All dimensions in millimeters (mm). Tolerances per DIN 917 / ISO 4759-1.

Thread
d		 Pitch
p (mm)		 Width Across
Flats s (mm)		 Width Across
Corners e (mm)		 Total Height
m (mm)		 Cap Height
h (mm)		 Cap Inner
Dia. dk (mm)		 Cap Inner
Depth t (mm)		 Unit Weight
(g/pc)
M3 0.5 5.5 6.01 5.5 2.4 3.4 1.8 0.6
M4 0.7 7.0 7.66 6.5 2.8 4.5 2.2 1.2
M5 0.8 8.0 8.79 8.0 3.5 5.5 2.8 2.0
M6 1.0 10.0 11.05 9.0 4.0 6.5 3.2 3.5
M8 1.25 13.0 14.38 11.0 5.0 8.6 4.0 7.5
M10 1.5 17.0 18.90 14.0 6.0 10.6 4.8 15.0
M12 1.75 19.0 21.10 16.0 7.0 12.6 5.6 22.0
M14 2.0 22.0 24.49 19.0 8.0 14.6 6.4 37.0
M16 2.0 24.0 26.75 21.0 9.0 16.6 7.2 50.0
M20 2.5 30.0 33.53 25.0 11.0 20.6 9.0 95.0

* Unit weights are approximate reference values for A2 stainless steel (density ≈ 7.93 g/cm³). Actual weights may vary slightly by batch.

Selection Guide

Application Requirement Recommended Specification
General indoor / light outdoor use M3–M8, A2-70, Passivated
Food processing / hygienic environments M5–M12, A2-70, Passivated & Pickled
Architectural / decorative exposed fastening M6–M16, A2-70, Bright Finish
Marine / coastal moderate exposure M6–M20, A2-70 (consider A4 for severe marine)
Electrical enclosures / panels M3–M10, A2-70, Passivated
Machinery guards & covers M8–M20, A2-70

Standard Reference

DIN 917 specifies low-profile thin-pattern cap nuts with a closed domed top that covers and protects the bolt end. Key standard relationships:

  • DIN 917 — Low profile thin pattern cap nut (this product)
  • DIN 1587 — High profile cap nut (taller dome, deeper cap)
  • ISO 4161 — Hexagon nuts with flange (different geometry)
  • Thread tolerance: 6H per ISO 965-1
  • Mechanical properties: A2-70 per ISO 3506-2
  • Dimensional tolerance: ISO 4759-1 Product Grade A (M3–M16), Grade B (M20)

Product Gallery

A2 Stainless Steel DIN 917 Cap Nut — actual product photos:

[Product Image 1] [Product Image 2] [Product Image 3] [Product Image 4]

Why FULLERKREG

  • 🏭 Direct Manufacturer — Produced in our own facility with full process control from raw material to finished part
  • 📐 Strict DIN Compliance — Every batch dimensionally verified against DIN 917 drawings; material certified to A2-70 (ISO 3506-2)
  • 🔬 Material Traceability — Mill certificates (MTC) available; SUS304 / 1.4301 composition verified per heat
  • 📦 Wholesale & Bulk Ready — Standard packaging in bulk bags or box-of-boxes; custom labeling and kitting available for OEM/distributor orders
  • 🌍 Global Export Experience — Regularly shipped to Europe, North America, Southeast Asia, and the Middle East with full export documentation
  • ⚡ Fast Lead Times — In-stock sizes available for immediate dispatch; custom sizes and special quantities on short lead time
  • 💬 Engineering Support — Technical team available to assist with specification, substitution, and application questions

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