ARP hex head bolts in M8 x 1.25 thread with a 60mm underhead length, machined from 8740 chromoly steel rated at 180,000 psi tensile strength. A black oxide finish protects against corrosion, and each pack includes five bolts with washers, a direct upgrade over generic grade hardware for engine and chassis applications.
Specifications
| Type | Hex head bolt |
| Thread | M8 x 1.25 |
| Length | 60mm underhead length |
| Material | 8740 chromoly steel, 180,000 psi tensile |
| Finish | Black oxide |
| Size | M8 x 1.25 x 60mm (5 Pack) |
| Includes | Washers |
| Part Number | 661-1009 |
Shipping
- Items stocked at OneFastShop and ordered before 3 PM ET typically ship the same business day. Items stocked with our distributors usually ship within 1 to 3 business days.
- 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 cannot 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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