A2 Stainless Steel Channel (Strut) Nuts with Spring 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 good general corrosion resistance 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 A2 Stainless Steel for Channel (Strut) Nuts with Spring
The most common stainless group for indoor and general outdoor fasteners. For channel (strut) nuts with spring, 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 |
Galvanic & Galling Considerations
Two important notes for stainless channel (strut) nuts with spring: (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 Channel (Strut) Nuts with Spring, the alternative stainless grade is A4 (316). A2 (304) covers general indoor and outdoor service. A4 (316) adds molybdenum, which is what buys the chloride resistance for marine and de-icing-salt exposure. Where strength matters more than corrosion, plated alloy steel in class 8.8 or 10.9 is the swap to make.
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 Channel (Strut) Nuts with Spring Available in A2 Stainless Steel
| Thread size | For channel width (mm) | Nut width (mm) | Nut height (mm) | Spring | Slot engagement | Material | Finish |
|---|---|---|---|---|---|---|---|
| M6 | 41 | 41 | 13 | Long spring | Grooved both ends | Steel | Zinc plated |
| M8 | 41 | 41 | 13 | Long spring | Grooved both ends | Steel | Zinc plated |
| M10 | 41 | 41 | 13 | Long spring | Grooved both ends | Steel | Hot-dip galvanised |
| M12 | 41 | 41 | 13 | Long spring | Grooved both ends | Steel | Hot-dip galvanised |
| M8 | 21 | 21 | 9 | Short spring | Grooved both ends | Steel | Zinc plated |
| M10 | 41 | 41 | 13 | No spring | Grooved both ends | A4 stainless | Passivated |
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. Thread, height, across-flats, property class, locking feature and flange form can all be varied, including thread sizes the standard series does not run to. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
