McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    29 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
     
    1-64
    1/8"0.118"0.073"Fully ThreadedCoarse
    170,000ASME B18.3, ASTM A5741090044A28000000
    3/16"0.118"0.073"Fully ThreadedCoarse
    170,000ASME B18.3, ASTM A5741090044A28100000
    1/4"0.118"0.073"Fully ThreadedCoarse
    170,000ASME B18.3, ASTM A5741090044A28200000
    3/8"0.118"0.073"Fully ThreadedCoarse
    170,000ASME B18.3, ASTM A5741090044A28300000
    1/2"0.118"0.073"Fully ThreadedCoarse
    170,000ASME B18.3, ASTM A5741090044A28400000
    5/8"0.118"0.073"Fully ThreadedCoarse
    170,000ASME B18.3, ASTM A574590044A28500000
    3/4"0.118"0.073"Fully ThreadedCoarse
    170,000ASME B18.3, ASTM A574590044A28600000
    1"0.118"0.073"Partially ThreadedCoarse
    170,000ASME B18.3, ASTM A574590044A28700000
     

    Stainless Steel Socket Head Screws

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

    Fully Threaded

    These screws won't rust or corrode when exposed to moisture and chemicals. Their deep, six-point socket keeps hex keys from slipping out and damaging the drive.
    Length is measured from under the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel screws can.
    Head
    Lg.
    Dia.
    Ht.
    Threading
    Thread
    Spacing
    Tensile Strength,
    psi
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1-64
    1/8"0.118"0.073"Fully ThreadedCoarse
    70,000ASME B18.35092196A45100000
    3/16"0.118"0.073"Fully ThreadedCoarse
    70,000ASME B18.35092196A0610000
    1/4"0.118"0.073"Fully ThreadedCoarse
    70,000ASME B18.35092196A4590000
    5/16"0.118"0.073"Fully ThreadedCoarse
    70,000ASME B18.35092196A0620000
    3/8"0.118"0.073"Fully ThreadedCoarse
    70,000ASME B18.35092196A0640000
    1/2"0.118"0.073"Fully ThreadedCoarse
    70,000ASME B18.310092196A42400000
    5/8"0.118"0.073"Fully ThreadedCoarse
    70,000ASME B18.32590696A1560000
     

    Sealing Socket Head Screws

    Image of Product. Front orientation. Socket Head Screws. Sealing Socket Head Screws.
    Image of Product. Back orientation. Socket Head Screws. Sealing Socket Head Screws, Fully Threaded.

    Fully Threaded

    Keep out dust and contaminants and lock in air and fluid. As you tighten these corrosion-resistant screws, a rubber O-ring under the head compresses to form a tight seal. The deep, six-point socket keeps hex keys from slipping out and damaging the drive.
    Length is measured from under the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel screws can.
    Buna-N O-Ring—These seals won't swell or soften when they touch oil, grease, or fuel.
    Head
    Lg.
    Dia.
    Ht.
    Threading
    Thread
    Spacing
    Tensile Strength,
    psi
    Max. Pressure,
    psi
    O-Ring Temp.
    Range, ° F
    Specs. Met
    Each
    18-8 Stainless Steel with Buna-N O-Ring
     
    1-64
    1/4"0.116"0.073"Fully ThreadedCoarse
    100,0001,500-40 to 225ASME B18.3, DIN 912, ISO 476295198A25600000
     

    Stainless Steel Button Head Hex-Drive Screws

    Image of Product. Front orientation. Rounded Head Screws. Stainless Steel Button Head Hex-Drive Screws.
    These button head screws won't corrode from moisture and chemicals, but they aren't as strong as alloy steel screws. The button head looks similar to a pan head, but it's lower and more compact, taking up less space. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver.
    Length is measured from under the head.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.
    Head
    Lg.
    Dia.
    Ht.
    Threading
    Tensile Strength,
    psi
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1-64
    1/8"0.129"0.033"Fully Threaded70,000ASME B18.32592949A31400000
    3/16"0.129"0.033"Fully Threaded70,000ASME B18.32592949A3150000
    1/4"0.129"0.033"Fully Threaded70,000ASME B18.310092949A3160000
    3/8"0.129"0.033"Fully Threaded70,000ASME B18.310092949A8890000
    1/2"0.129"0.033"Fully Threaded70,000ASME B18.310092949A8900000
    3/4"0.129"0.033"Fully Threaded70,000ASME B18.35092949A8910000
     

    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.
    Undercut Profile—About a third thinner than standard heads, the undercut profile fits into shallow holes in thin material. The thin head also has more threading on the shaft, so they're often used to keep short screws from coming loose.
    Head
    Lg.
    Countersink
    Angle
    Flat Head
    Profile
    Dia.
    Ht.
    Threading
    Tensile Strength,
    psi
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Alloy Steel
     
    1-64
    1/8"82°
    Undercut
    0.168"0.031"Fully Threaded130,000ASME B18.3, ASTM F8351091253A486000000
    3/16"82°
    Standard
    0.168"0.054"Fully Threaded130,000ASTM F8351091253A97100000
    1/4"82°
    Standard
    0.168"0.054"Fully Threaded130,000ASTM F8351091253A97200000
     

    Stainless Steel Hex-Drive Flat Head Screws

    Image of Product. Front orientation. Flat Head Screws. Stainless Steel Hex-Drive Flat Head Screws.
    The most corrosion-resistant hex-drive flat head screws we offer. Made of stainless steel, they won't rust or corrode when exposed to moisture and chemicals, but they're not as strong as alloy steel. 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.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these screws won't rust. However, they don't hold up to the harsh chemicals that 316 stainless steel can.
    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.
    18-8 Stainless Steel
     
    1-64
    3/16"82°
    Standard
    0.168"0.054"Fully Threaded70,000ASME B18.3, ASTM F8795092210A35800000
    1/4"82°
    Standard
    0.168"0.054"Fully Threaded70,000ASME B18.3, ASTM F8795092210A3610000
    3/8"82°
    Standard
    0.168"0.054"Fully Threaded70,000ASME B18.3, ASTM F8795092210A3640000
     

    Steel Button Head Hex-Drive Screws

    Image of Product. Front orientation. Rounded Head Screws. Steel Button Head Hex-Drive Screws.
    Made of alloy steel, these screws have nearly twice the tensile strength of other steel screws. The button head looks similar to a pan head, but it's lower and more compact, taking up less space. With six contact points, the hex drive withstands more torque than slotted and Phillips to securely grip your driver.
    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
    Tensile Strength,
    psi
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Alloy Steel
     
    1-64
    1/4"0.139"0.039"Fully Threaded120,000ASME B18.3, ASTM F8351091255A01300000
     
    back to top