These are ARP's 12-point flanged bolts in M6 x 1.00 thread with a 16mm underhead length, forged from ARP 8740 chromoly and finished in black oxide. The flanged head spreads clamp load without a separate washer, and the 12-point drive turns in tight spaces where a hex head has no room to swing a socket. Washers are included, and the bolts are sold five to a package.
Specifications
| Type | 12-point flanged bolt kit (ARP 8740 chromoly) |
| Thread | M6 x 1.00 |
| Size | M6 x 1.00 x 16mm underhead length (5 Pack) |
| Head Style | Flanged 12-point |
| Material | ARP 8740 chromoly steel |
| Finish | Black oxide |
| Includes | Washers |
| Quantity | 5 Pack |
| Part Number | 670-1017 |
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
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