This is a single CP 9310 steel wrist pin measuring 0.866 inch in diameter by 2.250 inches long with a 0.250 inch wall, finished with a diamond-like carbon (DLC) coating. Its straight wall construction reduces pin galling, and the pin is gun drilled and honed in three stages, case hardened through a computerized gas process, then cryogenically treated. Ends are precision ground and chamfered to accept wire locks, and the inside diameter is radiused. Every pin is 100 percent Rockwell tested and held to a one gram weight tolerance.
Specifications
| Type | Wrist pin (piston pin) |
| Material | 9310 steel |
| Finish | DLC coated |
| Diameter | 0.866 in (22mm) |
| Length | 2.250 in |
| Wall Thickness | 0.250 in |
| Ends | Chamfered for wire locks |
| Treatment | Case hardened and cryogenically treated |
| Weight Tolerance | +/- 1 gram |
| Quantity | 1 (sold individually, one pin per piston) |
| Part Number | 866-2250-25CP3C |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
