A4 Stainless Steel Full-Hex Open-End Blind Rivet Nuts are supplied to our own published dimensions — this is a trade-series article rather than one covered by a dimensional standard, so confirm the figures against the part you are replacing. The grade provides superior, including marine and chloride environments and is largely non-magnetic; the practical service range is approx. -200 °C to +400 °C, subject to the property class and the joint.
Why Choose A4 Stainless Steel for Full-Hex Open-End Blind Rivet Nuts
Specified for marine, coastal and chemical applications. For full-hex open-end blind rivet 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 |
Galvanic & Galling Considerations
Two important notes for stainless full-hex open-end blind rivet nuts: (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 Full-Hex Open-End Blind Rivet 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
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 Full-Hex Open-End Blind Rivet Nuts Available in A4 Stainless Steel
| Thread size | Pitch (mm) | Grip ranges (mm) | Installation hole (mm) | Flange diameter (mm) | Typical torque resistance (N·m) | Material options |
|---|---|---|---|---|---|---|
| M4 | 0.7 | 0.5~2.0 | 6.0 | 9.0 | 4 | steel or aluminum alloy |
| M5 | 0.8 | 0.5~2.5 / 2.5~5.0 | 7.0 | 10.0 | 6.5 | steel or aluminum alloy |
| M6 | 1.0 | 0.5~3.0 / 3.0~5.5 | 9.0 | 12.7 | 12 | steel or aluminum alloy |
| M8 | 1.25 | 1.0~3.5 / 3.5~5.5 | 11.0 | 16.0 | 31 | steel or aluminum alloy |
| M10 | 1.5 | 1.0~3.5 / 3.5~6.0 | 12.0 | 18.0 | 42 | steel or aluminum alloy |
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.
