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FULLERKREG DIN 439 thin hexagon nuts (also known as jam nuts or half nuts) are manufactured to DIN 439 / ISO 4035 standards in A2 stainless steel (SUS 304). With a reduced height profile compared to standard hex nuts, these jam nuts are ideal for locking applications, fine-thread assemblies, and space-constrained installations. All nuts are passivated and whitened for enhanced corrosion resistance and a clean finish.
| Attribute | Details |
|---|---|
| Standard | DIN 439 / ISO 4035 |
| Type | Thin Hexagon Nut (Jam Nut / Half Nut) |
| Material | A2 Stainless Steel (SUS 304 / 1.4301) |
| Surface Treatment | Passivated & Whitened (Bright Finish) |
| Strength Grade | A2-70 |
| Size Range | M1.6 – M48 |
| Thread | Metric Coarse Thread (per ISO 261) |
| RoHS Compliant | Yes |
Width Across Flats (s), Width Across Corners (e), Nut Height (m) — per DIN 439B standard. Unit weight (g) is theoretical reference value for A2 SS304 (density 7.93 g/cm³).
| Thread Size | Pitch (mm) | s max (mm) | s min (mm) | e min (mm) | m max (mm) | m min (mm) | Unit Weight (g/pc) |
|---|---|---|---|---|---|---|---|
| M1.6 | 0.35 | 3.20 | 3.00 | 3.41 | 1.00 | 0.75 | 0.06 |
| M2 | 0.4 | 4.00 | 3.80 | 4.32 | 1.20 | 0.95 | 0.12 |
| M2.3 | 0.4 | 4.50 | 4.30 | 4.88 | 1.20 | 0.95 | 0.15 |
| M2.5 | 0.45 | 5.00 | 4.80 | 5.45 | 1.60 | 1.35 | 0.22 |
| M2.6 | 0.45 | 5.00 | 4.80 | 5.45 | 1.60 | 1.35 | 0.22 |
| M3 | 0.5 | 5.50 | 5.30 | 6.01 | 1.80 | 1.55 | 0.35 |
| M3.5 | 0.6 | 6.00 | 5.80 | 6.01 | 2.00 | 1.75 | 0.44 |
| M4 | 0.7 | 7.00 | 6.78 | 7.66 | 2.20 | 1.95 | 0.72 |
| M5 | 0.8 | 8.00 | 7.78 | 8.79 | 2.70 | 2.45 | 1.18 |
| M6 | 1 | 10.00 | 9.78 | 11.05 | 2.70 | 2.45 | 1.78 |
| M6×1.25 | 1.25 | 10.00 | 9.78 | 11.05 | 3.20 | 2.90 | 2.10 |
| M8 | 1.25 | 13.00 | 12.73 | 14.38 | 4.00 | 3.70 | 3.85 |
| M10 | 1.5 | 17.00 | 16.73 | 18.90 | 5.00 | 4.70 | 7.20 |
| M10×1.25 | 1.25 | 17.00 | 16.73 | 18.90 | 5.00 | 4.70 | 7.20 |
| M12 | 1.75 | 19.00 | 18.67 | 21.10 | 6.00 | 5.70 | 11.80 |
| M12×1.75 | 1.75 | 19.00 | 18.67 | 21.10 | 6.00 | 5.70 | 11.80 |
| M14 | 2 | 22.00 | 21.67 | 24.49 | 7.00 | 6.42 | 18.50 |
| M16 | 2 | 24.00 | 23.67 | 26.75 | 8.00 | 7.42 | 26.80 |
| M16×2 | 2 | 24.00 | 23.67 | 26.75 | 8.00 | 7.42 | 26.80 |
| M18 | 2.5 | 27.00 | 26.16 | 29.56 | 9.00 | 8.42 | 37.50 |
| M20 | 2.5 | 30.00 | 29.16 | 32.95 | 10.00 | 9.10 | 52.00 |
| M22 | 2.5 | 32.00 | 31.00 | 35.03 | 11.00 | 9.90 | 68.00 |
| M24 | 3 | 36.00 | 35.00 | 39.55 | 12.00 | 10.90 | 98.00 |
| M27 | 3 | 41.00 | 40.00 | 45.20 | 13.50 | 12.40 | 145.00 |
| M30 | 3.5 | 46.00 | 45.00 | 50.85 | 15.00 | 13.90 | 205.00 |
| M33 | 3.5 | 50.00 | 49.00 | 55.37 | 16.50 | 15.40 | 278.00 |
| M36 | 4 | 55.00 | 53.80 | 60.79 | 18.00 | 16.90 | 380.00 |
| M39 | 4 | 60.00 | 58.80 | 66.44 | 19.50 | 18.20 | 490.00 |
| M42 | 4.5 | 65.00 | 63.10 | 71.30 | 21.00 | 19.70 | 625.00 |
| M45 | 4.5 | 70.00 | 68.10 | 76.95 | 22.50 | 21.20 | 790.00 |
| M48 | 5 | 75.00 | 73.10 | 82.60 | 24.00 | 22.70 | 980.00 |
* Unit weight values are theoretical reference based on A2 SS304 density (7.93 g/cm³). Actual weights may vary slightly. Sizes in blue (M1.6–M2.6, M45) are non-preferred; availability is limited and MOQ may be higher.
| Property | Value |
|---|---|
| Proof Load Stress | 580 N/mm² |
| Hardness (Vickers) | HV 147 – 302 (Rockwell B70–B100) |
| Tensile Strength (min) | 700 N/mm² |
| Yield Strength (min) | 450 N/mm² |
| Element | C | Si | Mn | P | S | Cr | Ni |
|---|---|---|---|---|---|---|---|
| Max % | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 17.5–19.5 | 8.0–10.5 |
| Application | Recommended Size | Notes |
|---|---|---|
| Locking / Jam application | M3 – M24 | Pair with standard hex nut; tighten jam nut first |
| Fine-thread precision assemblies | M6×1.25, M10×1.25 | Fine pitch variants for vibration-sensitive environments |
| Marine / outdoor corrosive environments | All sizes | A2 SS304 provides excellent atmospheric corrosion resistance |
| Food processing / pharmaceutical | M3 – M16 | Non-magnetic, hygienic, RoHS compliant |
| Heavy structural / large diameter | M27 – M48 | Contact FULLERKREG for bulk pricing and lead time |
These thin hexagon nuts conform to DIN 439 Part B (equivalent to ISO 4035). The standard specifies reduced-height hex nuts intended primarily for use as jam (locking) nuts. Thread tolerance is per ISO 965-2 (6H). Material and mechanical properties comply with ISO 3506-2 for austenitic stainless steel fasteners.
DIN 439 Thin Hexagon Nuts — A2 Stainless Steel (SS304) — FULLERKREG
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🏭 Direct Manufacturer — Factory-direct pricing with no middlemen, ensuring competitive wholesale rates.
📐 Precision to Standard — Every nut manufactured and inspected to DIN 439 / ISO 4035 dimensional tolerances.
🔬 Material Certified — Full material traceability; mill certificates available on request for A2 SS304.
🌊 Corrosion Resistant — Passivated A2 stainless steel for long-term performance in harsh environments.
📦 Bulk & Wholesale Ready — Flexible MOQ, bulk packaging, and custom labeling available for distributors.
🚢 Global Shipping — Reliable international logistics with experience in B2B export to 50+ countries.
✅ RoHS & REACH Compliant — All products meet international environmental and safety regulations.
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