Custom Slotted Round Nut manufactured in A2 Stainless Steel (ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70) are dimensioned to GB/T 812. The sections below give the mechanical and physical properties of the grade, its behavior in corrosive and elevated-temperature service, and the full size table.
Why Choose A2 Stainless Steel for Custom Slotted Round Nut — GB/T 812 (Series 070)
The most common stainless group for indoor and general outdoor fasteners. For custom slotted round nut — gb/t 812 (series 070), 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 Custom Slotted Round Nut — GB/T 812 (Series 070) in indoor and general outdoor service. In chloride-bearing environments (marine air, road salt, swimming pools) consider stepping up to A4 (316).
Comparable Grades
For Custom Slotted Round Nut — GB/T 812 (Series 070), the alternative stainless grade is A4 (316). 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
Expect the aluminum to corrode, not the fastener — stainless sits higher in the galvanic series, so the aluminum is the one that gives up material. A small fastener in a thick section spreads the loss over a large area and is usually fine; a large fastener in thin sheet concentrates it and is not. Keep water out of the joint, or isolate the two metals with a nylon or coated washer and a sealant.
Sizes of Custom Slotted Round Nut — GB/T 812 (Series 070) Available in A2 Stainless Steel
| Size | Pitch (mm) | Outer diameter D (mm) | Nut height m (mm) | Slot width (mm) | Slot depth (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M10x1.0 | 1.0 | 18 | 8 | 3 | 2 | GB/T 812 / DIN 1804 |
| M12x1.25 | 1.25 | 22 | 8 | 3 | 2 | GB/T 812 / DIN 1804 |
| M16x1.5 | 1.5 | 28 | 8 | 4 | 2.5 | GB/T 812 / DIN 1804 |
| M20x1.5 | 1.5 | 34 | 10 | 4 | 2.5 | GB/T 812 / DIN 1804 |
| M24x1.5 | 1.5 | 40 | 10 | 5 | 3 | GB/T 812 / DIN 1804 |
| M30x1.5 | 1.5 | 48 | 12 | 5 | 3 | GB/T 812 / DIN 1804 |
| M36x1.5 | 1.5 | 58 | 12 | 6 | 3 | GB/T 812 / DIN 1804 |
| M48x1.5 | 1.5 | 72 | 15 | 6 | 4 | GB/T 812 / DIN 1804 |
| M60x2.0 | 2.0 | 90 | 18 | 7 | 4 | GB/T 812 / DIN 1804 |
| M80x2.0 | 2.0 | 115 | 20 | 8 | 5 | GB/T 812 / DIN 1804 |
| M100x2.0 | 2.0 | 140 | 22 | 10 | 5 | GB/T 812 / DIN 1804 |
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.
