Material page for heat-set threaded inserts for plastic in A2 Stainless Steel (ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70). 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 good general corrosion resistance and the service range is approx. -200 °C to +400 °C, subject to the property class and the joint.
Why Choose A2 Stainless Steel for Heat-Set Threaded Inserts for Plastic
The most common stainless group for indoor and general outdoor fasteners. For heat-set threaded inserts for plastic, 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 Heat-Set Threaded Inserts for Plastic 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 Heat-Set Threaded Inserts for Plastic, the alternative stainless grade is A4 (316). 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 Heat-Set Threaded Inserts for Plastic Available in A2 Stainless Steel
| Thread size | Outer diameter (mm) | Length L (mm) | Hole in parent (mm) | Recommended boss OD (mm) | Knurl bands | Installation |
|---|---|---|---|---|---|---|
| M2 | 3.2 | 3.0 | 3.0 | 6.4 | 2 | Heated tip, 200-250 u00b0C |
| M2.5 | 3.6 | 4.0 | 3.4 | 7.2 | 2 | Heated tip, 200-250 u00b0C |
| M3 | 4.6 | 4.0 | 4.4 | 9.2 | 3 | Heated tip, 200-250 u00b0C |
| M3 | 4.6 | 5.7 | 4.4 | 9.2 | 3 | Heated tip, 200-250 u00b0C |
| M4 | 5.6 | 5.7 | 5.4 | 11.2 | 3 | Heated tip, 200-250 u00b0C |
| M5 | 6.9 | 5.8 | 6.7 | 13.8 | 3 | Heated tip, 200-250 u00b0C |
| M6 | 8.2 | 9.5 | 8.0 | 16.4 | 3 | Heated tip, 200-250 u00b0C |
Dimensions are independent of the material: the table above lists the sizes supplied, and on this page every one of them is quoted in A2 Stainless Steel. The catalogue's default material column has been omitted here so it cannot be read as contradicting that.
Custom manufacturing · Made to drawing
Need this threaded insert in a grade that is not listed?
A2 Stainless Steel is one of the grades the catalog describes. Thread size, body length, knurl or key form and installation method are all variable against the parent material. Made by tapping or knurling.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
