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    65 Products

    Low-Strength ASTM Grade A Steel Square Head Screws
    3D CAD models available

    Image of Product. Fully Threaded. Front orientation. Square Head Screws. Low-Strength ASTM Grade A Steel Square Head Screws, Fully Threaded.
    Image of Product. Partially Threaded. Front orientation. Square Head Screws. Low-Strength ASTM Grade A Steel Square Head Screws, Partially Threaded.

    Fully Threaded

    Partially

    Threaded

    About half the strength of medium-strength screws, these screws can be used for light duty fastening applications, such as securing access panels. Large flat sides make them easy to grip with a wrench and keep them from rotating in square holes. Material meets ASTM A307 specifications for quality. Length is measured from under the head.
    Head
    Nuts
    Lg.
    Threading
    Min. Thread
    Lg.
    Thread
    Spacing
    Wd.
    Ht.
    Tensile Strength,
    psi
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Pkg.
    Qty.
    Pkg.
    Steel
     
    1/4"-20 Threads
    1"Fully Threaded__Coarse
    3/8"11/64"60,000ASTM A307
    2500000000000000100000000000000000
    1 1/4"Partially Threaded3/4"Coarse
    3/8"11/64"60,000ASTM A307
    250000000000000010000000000000000
    1 1/2"Partially Threaded3/4"Coarse
    3/8"11/64"60,000ASTM A307
    500000000000000010000000000000000
    2"Partially Threaded3/4"Coarse
    3/8"11/64"60,000ASTM A307
    250000000000000010000000000000000
     
    5/16"-18 Threads
    3/4"Fully Threaded__Coarse
    1/2"13/64"60,000ASTM A307
    250000000000000010000000000000000
    1"Fully Threaded__Coarse
    1/2"13/64"60,000ASTM A307
    250000000000000010000000000000000
    1 1/4"Fully Threaded__Coarse
    1/2"13/64"60,000ASTM A307
    250000000000000010000000000000000
    1 1/2"Partially Threaded7/8"Coarse
    1/2"13/64"60,000ASTM A307
    100000000000000010000000000000000
    2"Partially Threaded7/8"Coarse
    1/2"13/64"60,000ASTM A307
    100000000000000010000000000000000
    3"Partially Threaded7/8"Coarse
    1/2"13/64"60,000ASTM A307
    100000000000000010000000000000000
    4"Partially Threaded7/8"Coarse
    1/2"13/64"60,000ASTM A307
    100000000000000010000000000000000
     
    3/8"-16 Threads
    1"Fully Threaded__Coarse
    9/16"1/4"60,000ASTM A307
    100000000000000010000000000000000
    1 1/4"Partially Threaded1"Coarse
    9/16"1/4"60,000ASTM A307
    10000000000000010000000000000000
    1 1/2"Partially Threaded1"Coarse
    9/16"1/4"60,000ASTM A307
    100000000000000010000000000000000
    1 3/4"Partially Threaded1"Coarse
    9/16"1/4"60,000ASTM A307
    100000000000000010000000000000000
    2"Partially Threaded1"Coarse
    9/16"1/4"60,000ASTM A307
    100000000000000010000000000000000
    2 1/2"Partially Threaded1"Coarse
    9/16"1/4"60,000ASTM A307
    100000000000000010000000000000000
    3"Partially Threaded1"Coarse
    9/16"1/4"60,000ASTM A307
    100000000000000010000000000000000
    3 1/2"Partially Threaded1"Coarse
    9/16"1/4"60,000ASTM A307
    100000000000000010000000000000000
     
    1/2"-13 Threads
    1"Fully Threaded__Coarse
    3/4"21/64"60,000ASTM A307
    10000000000000005000000000000000
    1 1/2"Fully Threaded__Coarse
    3/4"21/64"60,000ASTM A307
    10000000000000005000000000000000
    1 3/4"Fully Threaded__Coarse
    3/4"21/64"60,000ASTM A307
    10000000000000005000000000000000
    2"Partially Threaded1 1/4"Coarse
    3/4"21/64"60,000ASTM A307
    10000000000000005000000000000000
    2 1/4"Partially Threaded1 1/4"Coarse
    3/4"21/64"60,000ASTM A307
    5000000000000005000000000000000
    2 1/2"Partially Threaded1 1/4"Coarse
    3/4"21/64"60,000ASTM A307
    5000000000000005000000000000000
    3"Partially Threaded1 1/4"Coarse
    3/4"21/64"60,000ASTM A307
    5000000000000005000000000000000
    3 1/2"Partially Threaded1 1/4"Coarse
    3/4"21/64"60,000ASTM A307
    5000000000000005000000000000000
    4"Partially Threaded1 1/4"Coarse
    3/4"21/64"60,000ASTM A307
    5000000000000005000000000000000
    5"Partially Threaded1 1/4"Coarse
    3/4"21/64"60,000ASTM A307
    5000000000000005000000000000000
    6"Partially Threaded1 1/4"Coarse
    3/4"21/64"60,000ASTM A307
    5000000000000005000000000000000
    8"Partially Threaded1 1/2"Coarse
    3/4"21/64"60,000ASTM A307
    100000000000005000000000000000
     
    5/8"-11 Threads
    2"Partially Threaded1 1/2"Coarse
    15/16"27/64"60,000ASTM A307
    100000000000002500000000000000
    2 1/2"Partially Threaded1 1/2"Coarse
    15/16"27/64"60,000ASTM A307
    5000000000000002500000000000000
    3"Partially Threaded1 1/2"Coarse
    15/16"27/64"60,000ASTM A307
    100000000000002500000000000000
    3 1/2"Partially Threaded1 1/2"Coarse
    15/16"27/64"60,000ASTM A307
    100000000000002500000000000000
    4"Partially Threaded1 1/2"Coarse
    15/16"27/64"60,000ASTM A307
    100000000000002500000000000000
    4 1/2"Partially Threaded1 1/2"Coarse
    15/16"27/64"60,000ASTM A307
    100000000000002500000000000000
    5"Partially Threaded1 1/2"Coarse
    15/16"27/64"60,000ASTM A307
    100000000000002500000000000000
    6"Partially Threaded1 1/2"Coarse
    15/16"27/64"60,000ASTM A307
    100000000000002500000000000000
    7"Partially Threaded1 3/4"Coarse
    15/16"27/64"60,000ASTM A307
    100000000000002500000000000000
    11"Partially Threaded1 3/4"Coarse
    15/16"27/64"60,000ASTM A307
    100000000000002500000000000000
     
    3/4"-10 Threads
    2 1/2"Partially Threaded1 3/4"Coarse
    1 1/8"1/2"60,000ASTM A307
    100000000000001000000000000000
    3"Partially Threaded1 3/4"Coarse
    1 1/8"1/2"60,000ASTM A307
    100000000000001000000000000000
    3 3/4"Partially Threaded1 3/4"Coarse
    1 1/8"1/2"60,000ASTM A307
    100000000000001000000000000000
    4"Partially Threaded1 3/4"Coarse
    1 1/8"1/2"60,000ASTM A307
    100000000000001000000000000000
    4 1/2"Partially Threaded1 3/4"Coarse
    1 1/8"1/2"60,000ASTM A307
    100000000000001000000000000000
    5"Partially Threaded1 3/4"Coarse
    1 1/8"1/2"60,000ASTM A307
    100000000000001000000000000000
    5 1/2"Partially Threaded1 3/4"Coarse
    1 1/8"1/2"60,000ASTM A307
    1000000000000001000000000000000
    6"Partially Threaded1 3/4"Coarse
    1 1/8"1/2"60,000ASTM A307
    1000000000000001000000000000000
    7"Partially Threaded2"Coarse
    1 1/8"1/2"60,000ASTM A307
    100000000000001000000000000000
    8"Partially Threaded2"Coarse
    1 1/8"1/2"60,000ASTM A307
    1000000000000001000000000000000
    9"Partially Threaded2"Coarse
    1 1/8"1/2"60,000ASTM A307
    100000000000001000000000000000
    10"Partially Threaded2"Coarse
    1 1/8"1/2"60,000ASTM A307
    1000000000000001000000000000000
    12"Partially Threaded2"Coarse
    1 1/8"1/2"60,000ASTM A307
    1000000000000001000000000000000
     
    1"-8 Threads
    6"Partially Threaded2 1/4"Coarse
    1 1/2"21/32"60,000ASTM A307
    100000000000000500000000000000
    7"Partially Threaded2 1/2"Coarse
    1 1/2"21/32"60,000ASTM A307
    100000000000000500000000000000
    9"Partially Threaded2 1/2"Coarse
    1 1/2"21/32"60,000ASTM A307
    100000000000000500000000000000
    10"Partially Threaded2 1/2"Coarse
    1 1/2"21/32"60,000ASTM A307
    100000000000000500000000000000
     
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