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Not recommended for aluminum engines
Constructed of durable plastic for strength and reliability
and some other applications where conducted fluid needs inner rust-proof protection
Longer shank design to fit most counter tops including granite and marble
Hillman 5/8 In. x 4 In. Grade 2 Zinc Hex Bolts (25 Ct.) Brand_Warp Brothers Not recommended for aluminum enginesHex bolts are machine bolts that have been designed to adhere facing materials to prevent shear movement. Specifically in wood to wood, wood to metal, or metal to metal applications. Zinc grade 2 hex bolts are recommended for most general uses and are corrosion resistant for typical use. Be sure to pre drill any holes and to use washers and nuts that are a similar grade and finish.