ARP 8740 Chromoly Bolts – Black Oxide | Pack of 5 | 663-1007

Upgrade your fastener hardware with ARP's premium 8740 chromoly bolts — engineered to deliver a substantial safety margin over standard Grade 8 hardware for automotive, marine, and trailer applications. Specially heat-treated 8740 chromoly steel and a black oxide finish combine to deliver 180,000 psi tensile strength with excellent corrosion resistance in a clean, professional appearance.

Key Features

• 8740 Chromoly Steel: Premium ARP 8740 chromoly alloy steel provides superior strength, toughness, and fatigue resistance compared to standard Grade 8 fasteners
• 180,000 PSI Tensile Strength: Nominally rated at 180,000 psi tensile strength — a substantial extra margin of safety over Grade 8 hardware for high-stress applications
• Heat Treated: Specially heat-treated for consistent, optimized mechanical properties throughout each bolt
• Black Oxide Finish: Black oxide surface treatment provides corrosion resistance and a clean, professional underhood appearance
• Universal Application: Suitable for automotive, marine, and trailer installations requiring premium-quality fasteners
• ARP Quality: Manufactured by ARP (Automotive Racing Products) — the industry standard for high-performance fasteners trusted by OEMs, race teams, and engine builders worldwide

Specifications

• Type: Chromoly Bolts
• Material: ARP 8740 Chromoly Steel
• Finish: Black Oxide
• Tensile Strength: 180,000 psi (nominal)
• Quantity: Pack of 5
• Application: Universal — automotive, marine, trailer
• Part Number: 663-1007

Note: Verify thread size, length, and application requirements against the ARP part number before ordering. Always torque to ARP's specified values using ARP Ultra-Torque fastener assembly lubricant for accurate clamp load.