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12-Point Head Bolts [5/16-24 x 4 in. UHL, 3/8 in. Wrench, 8740 Chromoly, Black Oxide]
InfoVehicle Info Needed
ARPPART NUMBER: 070-741-4000

12-Point Head Bolts [5/16-24 x 4 in. UHL, 3/8 in. Wrench, 8740 Chromoly, Black Oxide]

$2399
ShippingShips on 11/19/2026
Lowest PriceLowest Price Guarantee

5/16'' Bolts, 3/8'' Wrenching, Fine Thread
12-Point Head SAE Bolts
  • 5/16-24 Thread
  • 4 in. Underhead Length
  • 1 in. Thread Length
  • 8740 Chromoly Steel, Black Oxide Finish
  • Set of 5

    If you are replacing tired or mismatched hardware with something you can trust under load, these 5/16-24 x 4 in. 12-point head bolts are a solid choice. Heat-treated chromoly construction and a black oxide finish deliver high tensile strength with a clean, uniform look.

    ARP 741-4000 12-Point Head SAE Bolts Features:

    • Thread Size: 5/16-24
    • Underhead Length: 4 in.
    • Thread Length: 1 in.
    • Grip Length: 3 in.
    • Head Height: 0.300 in.
    • Wrench Size: 3/8 in.
    • Collar Diameter: 0.620 in.
    • 12-Point head design
    • Heat-treated chromoly steel with black oxide finish
    • Nominally rated at 180,000 psi tensile strength
    • Sold as a set of 5
      • Convenient 5 Packs

      Now you can use premium-quality ARP chromemoly fasteners to install most anything on a car, boat, or trailer. The specially heat-treated 8740 chromemoly bolts feature a black oxide finish. They are nominally rated at 170,000 psi tensile strength to provide a substantial extra margin of safety over Grade 8 hardware. What's more, you can't beat the gorgeous looks of ARP fasteners, and their ability to resist rust. They're truly maintenance free!

      5 Bolts and 5 Washers per package
    Part TypeBolt Kit
    Product LineARP Bulk Fine Thread Chromemoly Bolts
    BrandARP
    Package Height0.62
    Package Width6.0
    Package Length10.0
    Weight0.61 PG
    Part CategoryPerformance Parts
    Thread Length1 in
    Head Diameter0.620 in
    Underhead Length4 in (101.6 mm)
    Shank Length3 in
    QuantitySet of 5
    Fastener FinishBlack oxide
    Material8740 Chromoly Steel
    Thread Size5/16-24
    Fastener MaterialChromoly
    Fastener Head Style12-point
    Head Tool Size3/8 in
    Washers IncludedYes
    Thread Size (In.)5/16-24
    Head Height0.300 in
    Fastener Yield Strength (Psi)170,000
    Part FitmentUniversal
    Head Style12-Point
    FinishBlack Oxide
    Under Head Length4 in
    Vendor Part Number741-4000
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning