Slotted Spring Pin Standard M3x4 65Mn Spring 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
| Material | 65Mn Spring Steel |
| Grade | 420-545HV30 |
| Diameter | M3 |
| Length | 4 mm |
| Surface Finish | Black Oxide (Hardened) |
| Brand | SFX Fasteners |
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 pin
This is a pin in 65Mn Spring Steel, at strength class 420-545HV30, supplied black oxide (hardened), with an M3 thread and a 4 mm length. 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 pin is a positive locator: it carries shear rather than clamp load, so it holds two parts in exact alignment instead of pressing them together. Used to locate and hinge components on machinery, linkages, hinges and tooling where a bolt would be the wrong kind of load path.
Black oxide on a hardened 10.9 / 12.9 part: stays within tight tolerances, adds mild corrosion resistance and avoids the hydrogen embrittlement that acid zinc plating can cause on high-strength steel.
M3 is a metric thread with an 3 mm nominal diameter and a coarse pitch of 0.5 mm (ISO 261). A standard hex head takes a 5.5 mm spanner across the flats.
Sold by the piece, so one is a valid order. Stock lines leave our warehouse within 24–48 hours of cleared payment, and freight is calculated at checkout from the packed weight and the destination.
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