For cap nuts, gost 11860 type 1 in A2 Stainless Steel, the controlling selection factors are corrosion exposure, strength requirement and service temperature. The grade data for A2 Stainless Steel (ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70) is summarized below together with every size supplied.
Why Choose A2 Stainless Steel for Cap Nuts, GOST 11860 Type 1
The most common stainless group for indoor and general outdoor fasteners. For cap nuts, gost 11860 type 1, this matters when good general corrosion resistance is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70 |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C, subject to the property class and the joint |
| Corrosion characteristic | Good general corrosion resistance |
Corrosion Behavior in Service
A2 (304) gives excellent atmospheric and most-water corrosion resistance and is the most common stainless for Cap Nuts, GOST 11860 Type 1 in indoor and general outdoor service. In chloride-bearing environments (marine air, road salt, swimming pools) consider stepping up to A4 (316).
Galvanic & Galling Considerations
Two important notes for stainless cap nuts, gost 11860 type 1: (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.
Using Stainless Fasteners in Aluminum
Stainless steel is more noble than aluminum, so with an electrolyte present — rain, condensation, salt spray — the aluminum becomes the anode and corrodes at the joint. Area ratio decides how bad it gets: a small stainless fastener in a large aluminum section is normally acceptable, a large stainless fastener in thin aluminum is not. Where the joint gets wet, isolate the metals with a coated or nylon washer and a sealant, or specify an aluminum or coated fastener instead.
Sizes of Cap Nuts, GOST 11860 Type 1 Available in A2 Stainless Steel
| Size | Pitch P (mm) | dk (mm) | h (mm) | Nut height m (mm) | Width across flats s (mm) | t (mm) | w (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|
| M3 | 0.5 | 5.0 | 7.5 | 2.4 | 5.5 | 5.0 | 2 | GOST 11860 |
| M4 | 0.7 | 6.5 | 8 | 3.2 | 7 | 5.5 | 2 | GOST 11860 |
| M5 | 0.8 | 7.5 | 10 | 4 | 8 | 7.5 | 2 | GOST 11860 |
| M6 | 1 | 9.5 | 12 | 5 | 10 | 8 | 2 | GOST 11860 |
| M8 | 1.25 | 12.5 | 15 | 6.5 | 13 | 11 | 2 | GOST 11860 |
| M10 | 1.5 | 15 | 18 | 8 | 16 | 13 | 2 | GOST 11860 |
| M12 | 1.75 | 17 | 22 | 10 | 18 | 16 | 3 | GOST 11860 |
| (M14) | 2.5 | 20 | 25 | 11 | 21 | 18 | 4 | GOST 11860 |
| M16 | 2.5 | 23 | 28 | 13 | 24 | 21 | 4 | GOST 11860 |
| (M18) | 2.5 | 26 | 32 | 15 | 27 | 25 | 5 | GOST 11860 |
| M20 | 2.5 | 28 | 34 | 16 | 30 | 26 | 5 | GOST 11860 |
| (M22) | 2.5 | 33 | 39 | 18 | 34 | 29 | 5 | GOST 11860 |
| M24 | 3 | 34 | 42 | 19 | 36 | 31 | 6 | GOST 11860 |
Dimensions are independent of the material: every size above is available in A2 Stainless Steel.
Custom manufacturing · Made to drawing
Need this nut in a grade that is not listed?
A2 Stainless Steel is one of the grades the catalog describes. Locking method is specifiable independently of the rest: nylon insert, all-metal deformed thread, serrated flange, or none. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
