DIN 557 Square Nut 201 Stainless Steel — stocked and shipped worldwide by SFX Fasteners. Available for single-piece retail orders — no minimum order — dispatched from our own warehouse within 24–48 hours.
Specifications
| Standard | DIN 557 |
| Material | 201 Stainless Steel |
| Grade | A2-70 |
| Surface Finish | Plain |
| Brand | SFX Fasteners |
Manufactured to DIN 557. Dimensions meet the published standard; tolerances per the standard’s normal grade unless stated otherwise. Full dimension table available on request.
Ordering & shipping
| Minimum order | No minimum — single pieces welcome |
| Pricing | Order totals are confirmed at checkout, before payment |
| Custom & dropship | Small batches to drawing · blind dropshipping on request |
| Dispatch | 24–48 hours for stock items |
| Shipping | Worldwide, calculated at checkout by weight and destination |
Need a specific size, grade or standard? Send us a quote request — we quote to drawing and to DIN / ANSI / GB / JIS standards.
About this DIN 557 nut
This is a nut made to DIN 557, in 201 Stainless Steel, at strength class A2-70, supplied plain. Every dimension is stated against the standard named above; where a tolerance class matters to your design, ask us and we will confirm it in writing before you order.
A nut is the closing half of a bolted joint. Its property class is chosen to match the bolt it is paired with — a class 8 nut for a grade 8.8 bolt, so the thread strips before the bolt breaks. Used wherever a bolt or stud has to be tightened from the far side, and for locking and positioning duties on machinery and steelwork.
201 is a lower-nickel austenitic stainless with added manganese. It is cheaper than 304 and adequate for dry indoor work, but it pits faster in humid or coastal air — not the grade for outdoor or marine use.
Plain (self-colour) means no coating. On 304 and 316 stainless that is fine — the alloy passivates on its own. On carbon steel it will rust, so choose a coated option instead.
Is this not quite the size or grade you need? Ask us — we produce small batches to drawing and to DIN, ISO, GB and JIS standards, and we consolidate pallet and container loads for trade orders.
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