Property Class 12.9 Steel (ISO 898-1 property class 12.9) is the highest common strength class, for high-load machine assembly. When t-slot nuts for aluminum profiles (quarter-turn, swivel-in, sliding) are specified in this grade, the dimensions remain per GN 505 / GN 506 / GN 507; the material determines corrosion behavior (requires plating or black-oxide protection) and the service temperature range (commonly limited to approx. +300 °C; confirm against the coating and the load). Both are covered below with the size table.
Why Choose Property Class 12.9 Steel for T-Slot Nuts for Aluminum Profiles (Quarter-Turn, Swivel-In, Sliding)
The highest common strength class, for high-load machine assembly. For t-slot nuts for aluminum profiles (quarter-turn, swivel-in, sliding), this matters when requires plating or black-oxide protection is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 898-1 property class 12.9 |
|---|---|
| Magnetic response | Magnetic |
| Service temperature | commonly limited to approx. +300 °C; confirm against the coating and the load |
| Corrosion characteristic | Requires plating or black-oxide protection |
Galvanic & Galling Considerations
For t-slot nuts for aluminum profiles (quarter-turn, swivel-in, sliding) in steel, the dominant compatibility issue is hydrogen embrittlement at high property classes (10.9 and above) when electroplated. Plating must be followed by an appropriate baking treatment, or a non-electroplated finish (mechanical zinc, zinc flake) should be substituted.
Comparable Grades
For T-Slot Nuts for Aluminum Profiles (Quarter-Turn, Swivel-In, Sliding), class 8.8 is the comparable strength step. Move up when the joint preload approaches the proof load of the current class; move down when the joint is over-specified. For corrosion-critical service, switch to stainless A2 or A4.
Sizes of T-Slot Nuts for Aluminum Profiles (Quarter-Turn, Swivel-In, Sliding) Available in Property Class 12.9 Steel
| Size | Type | Slot width · 20 series (mm) | Slot width · 30/40 series (mm) | Slot width · 45 series (mm) | e1 · 20 series (mm) | e1 · 30/40 series (mm) | e1 · 45 series (mm) | e2 · 20 series (mm) | e2 · 30/40 series (mm) | e2 · 45 series (mm) | h · 20 series (mm) | h · 30/40 series (mm) | h · 45 series (mm) | k · 20 series (mm) | k · 30/40 series (mm) | k · 45 series (mm) | Slot width · 5 mm (mm) | Slot width · 6 mm (mm) | Slot width · 8 mm (mm) | e1 · 5 mm (mm) | e1 · 6 mm (mm) | e1 · 8 mm (mm) | e2 · 5 mm (mm) | e2 · 6 mm (mm) | e2 · 8 mm (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M3 | GN 505 Serrated Quarter-Turn T-Slot nuts | 5.9 | 5.9 | 10 | 4.5 | 3.2 | 8 | GN 505 / GN 506 / GN 507 | ||||||||||||||||||
| M4 | GN 505 Serrated Quarter-Turn T-Slot nuts | 5.9 | 8 | 10 | 5.9 | 8 | 10 | 10 | 16 | 19 | 4.5 | 6.6 | 9.3 | 3.2 | 5 | 5.8 | GN 505 / GN 506 / GN 507 | |||||||||
| M5 | GN 505 Serrated Quarter-Turn T-Slot nuts | 5.9 | 8 | 10 | 5.9 | 8 | 10 | 10 | 16 | 19 | 4.5 | 6.6 | 9.3 | 3.2 | 5 | 5.8 | GN 505 / GN 506 / GN 507 | |||||||||
| M6 | GN 505 Serrated Quarter-Turn T-Slot nuts | 8 | 10 | 8 | 10 | 16 | 19 | 6.6 | 9.3 | 5 | 5.8 | GN 505 / GN 506 / GN 507 | ||||||||||||||
| M8 | GN 505 Serrated Quarter-Turn T-Slot nuts | 10 | 10 | 19 | 9.3 | 5.8 | GN 505 / GN 506 / GN 507 | |||||||||||||||||||
| M3 | GN 506 T-Slot nuts to swivel in | 5 | 6 | 12 | 17 | 7.7 | 10.5 | GN 505 / GN 506 / GN 507 | ||||||||||||||||||
| M4 | GN 506 T-Slot nuts to swivel in | 5 | 6 | 8 | 12 | 17 | 22 | 7.7 | 10.5 | 13.4 | GN 505 / GN 506 / GN 507 | |||||||||||||||
| M5 | GN 506 T-Slot nuts to swivel in | 5 | 6 | 8 | 12 | 17 | 22 | 7.7 | 10.5 | 13.4 | GN 505 / GN 506 / GN 507 | |||||||||||||||
| M6 | GN 506 T-Slot nuts to swivel in | 6 | 8 | 17 | 22 | 10.5 | 13.4 | GN 505 / GN 506 / GN 507 | ||||||||||||||||||
| M8 | GN 506 T-Slot nuts to swivel in | 8 | 22 | 13.4 | GN 505 / GN 506 / GN 507 | |||||||||||||||||||||
| M3 | GN 507 T-Slot sliding nuts | 5.8 | 8 | 10 | 9.5 | 16 | 20 | 9.5 | 16 | 20 | 4.5 | 6 | 10.5 | 3.3 | 4.2 | 5.5 | GN 505 / GN 506 / GN 507 | |||||||||
| M4 | GN 507 T-Slot sliding nuts | 5.8 | 8 | 10 | 9.5 | 16 | 20 | 9.5 | 16 | 20 | 4.5 | 6 | 10.5 | 3.3 | 4.2 | 5.5 | GN 505 / GN 506 / GN 507 | |||||||||
| M5 | GN 507 T-Slot sliding nuts | 5.8 | 8 | 10 | 9.5 | 16 | 20 | 9.5 | 16 | 20 | 4.5 | 6 | 10.5 | 3.3 | 4.2 | 5.5 | GN 505 / GN 506 / GN 507 | |||||||||
| M6 | GN 507 T-Slot sliding nuts | 8 | 10 | 16 | 20 | 16 | 20 | 6 | 10.5 | 4.2 | 5.5 | GN 505 / GN 506 / GN 507 | ||||||||||||||
| M8 | GN 507 T-Slot sliding nuts | 8 | 10 | 16 | 20 | 16 | 20 | 6 | 10.5 | 4.2 | 5.5 | GN 505 / GN 506 / GN 507 |
Dimensions are independent of the material: every size above is available in Property Class 12.9 Steel.
Custom manufacturing · Made to drawing
Need this nut in a grade that is not listed?
Grade 12 9 Steel is one of the grades the catalog describes. Thread size is the obvious variable and rarely the interesting one — height for clearance, across-flats for the tool already in the cell, and the locking feature for the vibration actually present. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
