A4 Stainless Steel Slotted Set Screws with Cone Point combine the dimensional form of ISO 7434 with the material properties of grade ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80: superior, including marine and chloride environments, largely non-magnetic, service range approx. -200 °C to +400 °C, subject to the property class and the joint. This page summarizes the grade data, its corrosion behavior in service, the comparable grades, and the sizes supplied.
Why Choose A4 Stainless Steel for Slotted Set Screws with Cone Point
Specified for marine, coastal and chemical applications. For slotted set screws with cone point, 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 slotted set screws with cone point: (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 Slotted Set Screws with Cone Point, 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 Slotted Set Screws with Cone Point Available in A4 Stainless Steel
| Size | dt_max (mm) | n_nom (mm) | n_min (mm) | n_max (mm) | t_nom_min (mm) | t_max (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|
| M1.2 | 0.12 | 0.2 | 0.26 | 0.4 | 0.4 | 0.52 | 2~6 | ISO 7434 |
| M1.6 | 0.16 | 0.25 | 0.31 | 0.45 | 0.56 | 0.74 | 2~8 | ISO 7434 |
| M2 | 0.2 | 0.25 | 0.31 | 0.45 | 0.64 | 0.84 | 3~10 | ISO 7434 |
| M2.5 | 0.25 | 0.4 | 0.46 | 0.6 | 0.72 | 0.95 | 3~12 | ISO 7434 |
| M3 | 0.3 | 0.4 | 0.46 | 0.6 | 0.8 | 1.05 | 4~16 | ISO 7434 |
| (M3.5) | 0.35 | 0.5 | 0.56 | 0.7 | 0.96 | 1.21 | ISO 7434 | |
| M4 | 0.4 | 0.6 | 0.66 | 0.8 | 1.12 | 1.42 | 6~20 | ISO 7434 |
| M5 | 0.5 | 0.8 | 0.86 | 1 | 1.25 | 1.63 | 8~25 | ISO 7434 |
| M6 | 1.5 | 1 | 1.06 | 1.2 | 1.6 | 2 | 8~30 | ISO 7434 |
| M8 | 2 | 1.2 | 1.26 | 1.51 | 2 | 2.5 | 10~40 | ISO 7434 |
| M10 | 2.5 | 1.6 | 1.66 | 1.91 | 2.4 | 3 | 12~50 | ISO 7434 |
| M12 | 3 | 2 | 2.06 | 2.31 | 2.8 | 3.6 | 14~60 | ISO 7434 |
Dimensions are independent of the material: every size above is available in A4 Stainless Steel.
Custom manufacturing · Made to drawing
Need this screw in a grade that is not listed?
A4 Stainless Steel is one of the grades the catalog describes. Head form and drive can be specified to the assembly rather than to a standard: a larger bearing face, a security drive, or a socket sized for the tool already on the bench. Made by cold heading or warm forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
