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Hex Head Bolts [1/2-13 x 1.250 in. UHL, 9/16 in. Wrench, Stainless Steel, Polished]
InfoVehicle Info Needed
ARPPART NUMBER: 070-646-1250

Hex Head Bolts [1/2-13 x 1.250 in. UHL, 9/16 in. Wrench, Stainless Steel, Polished]

$3299
ShippingShips on 11/19/2026
Lowest PriceLowest Price Guarantee

Hex Head SAE Bolts
  • 1/2-13 Thread
  • 1.250 in. Underhead Length
  • 1.250 in. Thread Length
  • Stainless Steel, Polished Finish
  • Set of 5

    Polished stainless hardware is one of the easiest ways to dress up an engine bay, but it still has to do its job. These 1/2-13 x 1.250 in. hex head bolts are machined to tight tolerances and polished to a bright finish, so they resist corrosion while offering far more strength than typical hardware store bolts.

    ARP 646-1250 Hex Head SAE Bolts Features:

    • Thread Size: 1/2-13
    • Underhead Length: 1.250 in.
    • Thread Length: 1.250 in.
    • Head Height: 0.450 in.
    • Wrench Size: 9/16 in.
    • Collar Diameter: 0.850 in.
    • Hex head design
    • Stainless steel resists rust and corrosion
    • Polished finish
    • Nominally rated at 180,000 psi tensile strength
    • Sold as a set of 5
    • Part TypeBolt Kit
    BrandARP
    Package Height1.0
    Package Width4.0
    Package Length6.0
    Weight0.58 PG
    Part CategoryPerformance Parts
    Thread Length1.250 in
    Head Diameter0.850 in
    Underhead Length1.25 in (31.8 mm)
    Wrench Diameter (In.)9/16
    QuantitySet of 5
    Fastener FinishPolished
    MaterialStainless Steel
    Thread Size1/2-13
    Fastener MaterialStainless steel
    Fastener Head StyleHex
    Head Tool Size9/16 in
    Washers IncludedYes
    Thread Size (In.)1/2-13
    Head Height0.450 in
    Fastener Yield Strength (Psi)170,000
    Part FitmentUniversal
    Head StyleHex
    FinishPolished
    Under Head Length1.250 in
    Vendor Part Number646-1250
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning