A2 Stainless Steel Lag Shields (Lag Screw Anchors) 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 Lag Shields (Lag Screw Anchors)
The most common stainless group for indoor and general outdoor fasteners. For lag shields (lag screw anchors), 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 lag shields (lag screw anchors): (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 Lag Shields (Lag Screw Anchors), 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
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 Lag Shields (Lag Screw Anchors) Available in A2 Stainless Steel
| For lag screw size | Drill hole diameter (mm) | Shield length (mm) | Embedment depth (mm) | Substrate | Finish | Note |
|---|---|---|---|---|---|---|
| 6 mm / 1/4" | 11 | 32 | 32 | Dense concrete | Plain | Short — hard base |
| 6 mm / 1/4" | 11 | 45 | 45 | Block, brick | Plain | Long — soft base |
| 8 mm / 5/16" | 13 | 38 | 38 | Dense concrete | Plain | Short — hard base |
| 8 mm / 5/16" | 13 | 54 | 54 | Block, brick | Plain | Long — soft base |
| 10 mm / 3/8" | 16 | 45 | 45 | Dense concrete | Plain | Short — hard base |
| 10 mm / 3/8" | 16 | 64 | 64 | Block, brick | Plain | Long — soft base |
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 anchor & concrete fixing in a grade that is not listed?
A2 Stainless Steel is one of the grades the catalog describes. A non-standard anchor & concrete fixing is quoted from the drawing; where one already exists in the catalog, the special is usually a variation on its tooling. Made by hot forging or thread rolling.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
