Home » DIN 508 T-Slot Nut, 40Cr Steel, Blackened, Class 10

DIN 508 T-Slot Nut, 40Cr Steel, Blackened, Class 10

DIN 508 T-Slot Nuts — 40Cr Steel, Blackened, Class 10 | Heat-Treated

FULLERKREG DIN 508 T-Slot Nuts in Class 10 represent the highest standard grade in our T-slot nut range. Manufactured from 40Cr alloy steel — a chromium-alloyed medium-carbon steel — and subjected to full quench-and-temper heat treatment, these nuts deliver exceptional tensile strength and fatigue resistance. The blackened (black oxide) surface finish provides a professional appearance with moderate corrosion protection suited to indoor machine tool environments. Designed to fit DIN 650 T-slot profiles, they are the preferred choice for heavy-duty machining centers, large boring mills, and high-vibration clamping applications where standard Class 8 nuts are insufficient.

Product Specifications

Standard DIN 508
Material 40Cr High-Strength Alloy Steel, Quench & Temper Heat-Treated
Surface Treatment Blackened (Black Oxide)
Property Class Class 10 (Min. tensile strength 1000 MPa)
Thread Type Metric Coarse (ISO 68-1)
Thread Sizes Available M5 · M6 · M8 · M10 · M12 · M14 · M16 · M18 · M20 · M22 · M24 · M27 · M30 · M36 · M42 · M48
Applicable T-Slot DIN 650 T-slot profiles
RoHS Compliant Yes
Brand FULLERKREG

Grade Comparison — Class 4 / Class 8 / Class 10

Property Class 4 Class 8 Class 10 ★ This Product
Material A3 Low Carbon Steel 45 Carbon Steel 40Cr Alloy Steel
Heat Treatment None Quench & Temper ✅ Quench & Temper
Min. Tensile Strength 400 MPa 800 MPa 1000 MPa
Fatigue Resistance Standard Good ✅ Excellent
Recommended for Light–medium duty Heavy duty ✅ Extreme load / high vibration
Surface Zinc Cr3 Blackened Blackened

Dimensional Data — DIN 508 T-Slot Nuts, Class 10

All dimensions in millimeters (mm). Weight in grams (g) per piece. Select by slot width (a) and thread (d).

Thread
(d)		 Slot Width
a (mm)		 Nut Width
b (mm)		 Nut Length
e (mm)		 Total Height
h (mm)		 Flange Height
k (mm)		 Single Weight
(g/pc)
M5 6 5 10 8 4 3
M6 8 7 12 10 5 6
M8 10 9 16 12 6 12
M8 12 11 18 14 7 16
M10 12 11 20 14 7 20
M10 14 13 22 16 8 26
M12 14 13 25 18 9 36
M12 16 15 28 20 10 50
M14 16 15 30 22 11 64
M16 18 17 35 25 12 96
M16 20 19 38 28 14 120
M18 20 19 40 30 15 148
M20 22 21 44 32 16 196
M20 25 24 48 36 18 268
M22 25 24 50 38 19 318
M24 28 27 55 40 20 420
M27 32 31 60 45 22 600
M30 36 35 68 52 26 1010
M36 42 41 80 60 30 1680
M42 50 48 90 70 35 2800
M48 56 54 100 80 40 4200

* Dimensions per DIN 508. Weight values are nominal reference values. Contact FULLERKREG for certified inspection reports or custom sizes.

Product Photos

       

Selection Guide — Which Size Do I Need?

Application Recommended Thread Typical Slot Width Load Level
Precision fixtures, small workholding M5 · M6 · M8 6 · 8 · 10 mm Light
Milling, drilling & grinding fixtures M10 · M12 · M14 · M16 12 · 14 · 16 · 18 mm Medium–High
Heavy-duty machining centers, high vibration M18 · M20 · M22 · M24 20 · 22 · 25 · 28 mm High
Large boring mills, press beds, extreme load M27 · M30 · M36 · M42 · M48 32 · 36 · 42 · 50 · 56 mm Extreme

Standard Reference

These T-slot nuts conform to DIN 508 dimensional requirements and are manufactured from 40Cr alloy steel to meet ISO Class 10 mechanical properties. They are designed to fit DIN 650 T-slot profiles across a wide range of groove widths. The square body slides into the T-slot from the end of the track and rotates 90° to engage. The flange (k) rests on the slot shoulders to support the nut in position.

  • DIN 508 — T-slot nuts for machine tool tables
  • DIN 650 — T-slot profiles (multiple groove widths supported)
  • ISO 68-1 — Metric coarse thread form
  • Property Class 10 — Min. tensile strength 1000 MPa, 40Cr alloy steel, quench & temper
  • RoHS — Compliant

Why FULLERKREG?

🏭 Direct Manufacturer — Produced in-house with full process control, no middlemen.
⚡ 40Cr Alloy Steel, Class 10 — Chromium-alloyed, quench & tempered for 1000 MPa tensile strength — the highest grade in our DIN 508 range.
📐 DIN 508 Certified Dimensions — Every batch inspected against DIN 508 tolerances.
🔩 Full Size Range — M5 through M48, covering precision fixtures to large press beds.
📦 Bulk & Wholesale Ready — MOQ-flexible, OEM packaging, FBA-ready export.
🌍 Global Shipping — Reliable export logistics to 50+ countries.
📋 Full Documentation — Material certs, RoHS compliance, and inspection reports on request.

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