Material page for push-button quick-adjust nuts in A4 Stainless Steel (ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80). The sizes below are the ones we supply; there is no published dimensional standard for this article, so the table rather than a standard number is what to quote. Corrosion behaviour is superior, including marine and chloride environments and the service range is approx. -200 °C to +400 °C, subject to the property class and the joint.
Why Choose A4 Stainless Steel for Push-Button Quick-Adjust Nuts
Specified for marine, coastal and chemical applications. For push-button quick-adjust nuts, 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 |
Corrosion Behavior in Service
A4 (316) adds 2–3% molybdenum to the A2 (304) composition, which dramatically improves resistance to chloride-pitting corrosion. For Push-Button Quick-Adjust Nuts in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.
Comparable Grades
For Push-Button Quick-Adjust Nuts, the alternative stainless grade is A2 (304). Choose A2 (304) for general use and A4 (316) wherever chlorides are present; the molybdenum in A4 is the whole difference. Remember that stainless is the corrosion answer, not the strength answer — for load, look at class 8.8 or 10.9 instead.
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 Push-Button Quick-Adjust Nuts Available in A4 Stainless Steel
| For rod thread | Body width (mm) | Body height (mm) | Holding force (N, typical) | Holding vs standard nut | Operation | Material | Use |
|---|---|---|---|---|---|---|---|
| M8 | 32 | 18 | 2500 | approx. 25% | Push button | Zinc alloy body, steel half nut | Jigs, adjustable frames |
| M10 | 38 | 20 | 4000 | approx. 25% | Push button | Zinc alloy body, steel half nut | Jigs, adjustable frames |
| M12 | 44 | 24 | 6000 | approx. 25% | Push button | Zinc alloy body, steel half nut | Clamping rigs |
| M16 | 54 | 28 | 10000 | approx. 25% | Push button | Zinc alloy body, steel half nut | Clamping rigs |
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. 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.
