McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    22 Products

    Steel Socket Head Screws

    Image of Product. Front orientation. Socket Head Screws. Steel Socket Head Screws, Fully Threaded.
    Image of Product. Front orientation. Socket Head Screws. Steel Socket Head Screws, Partially Threaded.

    Fully Threaded

    Partially Threaded

    Made of alloy steel, these screws are the standard for high-strength fastening. Use them in high-load applications such as dies, presses, and heavy equipment. The deep, six-point socket keeps the hex key from slipping out and damaging the drive.
    Length is measured from under the head.
    Black-Oxide Alloy Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Head
    Lg.
    Dia.
    Ht.
    Threading
    Thread
    Spacing
    Tensile Strength,
    psi
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Alloy Steel
     
    1 1/2"-6
    3"2 1/4"1 1/2"Fully ThreadedCoarse
    170,000ASTM A574191251A034000000
    3 1/4"2 1/4"1 1/2"Fully ThreadedCoarse
    170,000ASTM A574191251A42900000
    3 1/2"2 1/4"1 1/2"Fully ThreadedCoarse
    170,000ASTM A574191251A95500000
    4"2 1/4"1 1/2"Fully ThreadedCoarse
    170,000ASTM A574191251A95600000
    4 1/2"2 1/4"1 1/2"Fully ThreadedCoarse
    170,000ASTM A574191251A96100000
    5"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A95800000
    5 1/2"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A96200000
    6"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A96000000
    6 1/2"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A03600000
    7"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A05300000
    8"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A96300000
    9"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A05800000
    10"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A96400000
    12"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A97600000
    14"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A979000000
    18"2 1/4"1 1/2"Partially ThreadedCoarse
    170,000ASTM A574191251A981000000
     

    Steel Hex-Drive Flat Head Screws

    Image of Product. Front orientation. Flat Head Screws. Steel Hex-Drive Flat Head Screws.
    Our strongest hex-drive flat head screws. They're made of alloy steel, so they have nearly twice the tensile strength of other screws. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver without slipping and stripping the drive.
    Length is measured from the top of the head.
    Black-Oxide Alloy Steel—Typically chosen for their appearance, these screws have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.
    Standard Profile—Standard-profile heads are the most common choice for flat head screws.
    Head
    Lg.
    Countersink
    Angle
    Flat Head
    Profile
    Dia.
    Ht.
    Threading
    Tensile Strength,
    psi
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Alloy Steel
     
    1 1/2"-6
    4"82°
    Standard
    2.938"0.827"Fully Threaded130,000ASTM F835191253A989000000
    5"82°
    Standard
    2.938"0.827"Partially Threaded130,000ASTM F835191253A99000000
    6"82°
    Standard
    2.938"0.827"Partially Threaded130,000ASTM F835191253A99100000
     

    Steel Cup-Tip Set Screws

    Image of Product. Front orientation. Set Screws. Steel Cup-Tip Set Screws.
    Made of alloy steel, these screws are strong enough to hold components without wearing down. The tip has thin edges that dig into surfaces for a secure hold. They often lock gears, pulleys, and other transmission components onto shafts.
    Black-Oxide Alloy Steel—These screws have a dark matte finish that offers minimal corrosion resistance, so they're best for dry environments.
    Lg.
    Drive
    Size
    Hardness
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Alloy Steel
     
    1 1/2"-6
    1"3/4"Rockwell C45ASME B18.3, ASTM F912191375A953000000
    1 1/4"3/4"Rockwell C45ASME B18.3, ASTM F912191375A95600000
    1 1/2"3/4"Rockwell C45ASME B18.3, ASTM F912191375A95900000
     
    back to top