A4 Stainless Steel (ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80) is specified for marine, coastal and chemical applications. 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 (superior, including marine and chloride environments) and the service temperature range (approx. -200 °C to +400 °C, subject to the property class and the joint). Both are covered below with the size table.
Why Choose A4 Stainless Steel for T-Slot Nuts for Aluminum Profiles (Quarter-Turn, Swivel-In, Sliding)
Specified for marine, coastal and chemical applications. For t-slot nuts for aluminum profiles (quarter-turn, swivel-in, sliding), this matters when superior, including marine and chloride environments is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80 |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C, subject to the property class and the joint |
| Corrosion characteristic | Superior, including marine and chloride environments |
Galvanic & Galling Considerations
Two important notes for stainless t-slot nuts for aluminum profiles (quarter-turn, swivel-in, sliding): (1) stainless can gall on stainless threads under load — use a thread lubricant or anti-galling compound, especially for M6 and below; (2) when joined to aluminum or galvanized steel, stainless can drive galvanic corrosion of the less-noble metal in wet service — isolate with a coating or sleeve where appropriate.
Comparable Grades
For T-Slot Nuts for Aluminum Profiles (Quarter-Turn, Swivel-In, Sliding), the alternative stainless grade is A2 (304). The practical dividing line is chlorides: A2 (304) is fine until salt is involved, and A4 (316) exists for the cases where it is — coastal, marine and road-salt service. Neither reaches the strength of a plated class 8.8 or 10.9 fastener.
Using Stainless Fasteners in Aluminum
The galvanic couple here runs the wrong way: aluminum is the less noble metal, so it corrodes and the fastener does not. What governs the rate is the ratio of areas — a large anode and a small cathode is a tolerable combination, the reverse concentrates the attack into thin material around the hole. An isolating washer plus sealant breaks the circuit; where that is impractical, match the fastener to the substrate.
Sizes of T-Slot Nuts for Aluminum Profiles (Quarter-Turn, Swivel-In, Sliding) Available in A4 Stainless 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 A4 Stainless Steel.
Custom manufacturing · Made to drawing
Need this nut in a grade that is not listed?
A4 Stainless Steel is one of the grades the catalog describes. Height and across-flats are the two most often changed — a thinner nut for clearance, a larger hex for a tool that is already on the line. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
