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Hex Head Bolts [1/2-13 x 2.500 in. UHL, 9/16 in. Wrench, Stainless Steel, Polished]
InfoVehicle Info Needed
ARPPART NUMBER: 070-646-2500

Hex Head Bolts [1/2-13 x 2.500 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
  • 2.500 in. Underhead Length
  • 1.250 in. Thread Length
  • Stainless Steel, Polished Finish
  • Set of 5

    When a stock fastener is the weak point in an assembly, a 1/2-13 x 2.500 in. hex head bolt in polished stainless steel gives you a stronger, cleaner-looking replacement that will not rust. These bolts suit engine, chassis and trailer work where you want hardware that holds clamping load and still looks sharp.

    ARP 646-2500 Hex Head SAE Bolts Features:

    • Thread Size: 1/2-13
    • Underhead Length: 2.500 in.
    • Thread Length: 1.250 in.
    • Grip 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 Width4.8
    Package Length7.3
    Weight0.97 PG
    Part CategoryPerformance Parts
    Thread Length1.250 in
    Head Diameter0.850 in
    Underhead Length2.5 in (63.5 mm)
    Shank Length1.250 in
    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 Length2.500 in
    Vendor Part Number646-2500
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning