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    251 Products

    External-Square-Drive Steel Cup-Tip Set Screws

    Image of Product. Front orientation. Set Screws. External-Square-Drive Steel Cup-Tip Set Screws.
    The large, flat sides prevent sockets from slipping. With four contact points, these screws give you reliable torque but slightly less than external hex drives. The tip has thin edges that dig into surfaces for a secure hold. These screws often lock gears, pulleys, and other transmission components onto shafts.
    Alloy Steel—With exceptional strength and hardness, these alloy steel screws excel in high-wear applications.
    Steel—An economical choice with good strength but not as strong as alloy steel.
    Head
    Lg.
    Wd.
    Ht.
    Hardness
    Pkg.
    Qty.
    Pkg.
    Alloy Steel
     
    1/4"-20
    1/2"1/4"13/64"Rockwell C451091416A110000000
    5/8"1/4"13/64"Rockwell C451091416A11500000
    3/4"1/4"13/64"Rockwell C451091416A12000000
    1"1/4"13/64"Rockwell C451091416A12500000
    1 1/4"1/4"13/64"Rockwell C451091416A13000000
    1 1/2"1/4"13/64"Rockwell C451091416A13500000
    2"1/4"13/64"Rockwell C45191416A55000000
     
    5/16"-18
    1/2"5/16"1/4"Rockwell C451091416A21000000
    3/4"5/16"1/4"Rockwell C451091416A21500000
    1 1/2"5/16"1/4"Rockwell C45591416A2200000
    2 1/2"5/16"1/4"Rockwell C45191416A59300000
     
    3/8"-16
    3/4"3/8"19/64"Rockwell C451091416A31000000
    1"3/8"19/64"Rockwell C45591416A3150000
    1 1/4"3/8"19/64"Rockwell C45591416A32000000
    1 1/2"3/8"19/64"Rockwell C45591416A32500000
    2"3/8"19/64"Rockwell C45591416A33000000
     
    1/2"-13
    3/4"1/2"25/64"Rockwell C45591416A41000000
    1 1/2"1/2"25/64"Rockwell C45591416A41500000
    2"1/2"25/64"Rockwell C45591416A42000000
    3"1/2"25/64"Rockwell C45191416A4250000
    4"1/2"25/64"Rockwell C45191416A72800000
     
    5/8"-11
    2"5/8"31/64"Rockwell C45191416A5100000
    3"5/8"31/64"Rockwell C45191416A51500000
    4"5/8"31/64"Rockwell C45191416A52000000
    5"5/8"31/64"Rockwell C45191416A81400000
     
    3/4"-10
    3 1/2"3/4"19/32"Rockwell C45191416A61000000
    4"3/4"19/32"Rockwell C45191416A61500000
    5"3/4"19/32"Rockwell C45191416A85500000
     
    Steel
     
    1/4"-20
    3/8"1/4"3/16"Rockwell B805091410A5350000
    1/2"1/4"3/16"Rockwell B805091410A53700000
    5/8"1/4"3/16"Rockwell B805091410A53800000
    3/4"1/4"3/16"Rockwell B805091410A54000000
    7/8"1/4"3/16"Rockwell B801091410A7410000
    1"1/4"3/16"Rockwell B805091410A54200000
    1 1/2"1/4"3/16"Rockwell B802591410A5460000
    1 3/4"1/4"3/16"Rockwell B801091410A7420000
    2"1/4"3/16"Rockwell B801091410A5500000
    2 1/4"1/4"3/16"Rockwell B801091410A7430000
    2 1/2"1/4"3/16"Rockwell B80591410A7440000
    2 3/4"1/4"3/16"Rockwell B80591410A7450000
    3"1/4"3/16"Rockwell B80591410A7460000
    6"1/4"3/16"Rockwell B80191410A75200000
     
    5/16"-18
    3/8"5/16"1/4"Rockwell B801091410A7530000
    1/2"5/16"1/4"Rockwell B805091410A57800000
    3/4"5/16"1/4"Rockwell B805091410A58100000
    1"5/16"1/4"Rockwell B805091410A58300000
    1 1/4"5/16"1/4"Rockwell B805091410A58500000
    1 1/2"5/16"1/4"Rockwell B802591410A58700000
    2"5/16"1/4"Rockwell B802591410A94200000
    2 1/2"5/16"1/4"Rockwell B80591410A7540000
    3"5/16"1/4"Rockwell B801091410A94300000
    3 1/2"5/16"1/4"Rockwell B80191410A7550000
    4"5/16"1/4"Rockwell B80191410A7560000
    6"5/16"1/4"Rockwell B80191410A75900000
     
    3/8"-16
    1/2"3/8"19/64"Rockwell B805091410A61900000
    3/4"3/8"19/64"Rockwell B805091410A62200000
    1"3/8"19/64"Rockwell B802591410A62400000
    1 1/4"3/8"19/64"Rockwell B802591410A62600000
    1 1/2"3/8"19/64"Rockwell B802591410A62800000
    2"3/8"19/64"Rockwell B802591410A63200000
    2 1/4"3/8"19/64"Rockwell B80591410A7610000
    2 1/2"3/8"19/64"Rockwell B801091410A63400000
    2 3/4"3/8"19/64"Rockwell B80591410A76200000
    3"3/8"19/64"Rockwell B801091410A63600000
    3 1/2"3/8"19/64"Rockwell B801091410A63900000
    4"3/8"19/64"Rockwell B80591410A64200000
    4 1/2"3/8"19/64"Rockwell B80191410A6450000
    5"3/8"19/64"Rockwell B80191410A6480000
     
    7/16"-14
    3/4"7/16"11/32"Rockwell B80591410A7630000
    1"7/16"11/32"Rockwell B801091410A66900000
    1 1/4"7/16"11/32"Rockwell B80591410A7650000
    1 1/2"7/16"11/32"Rockwell B80591410A7660000
    1 3/4"7/16"11/32"Rockwell B80591410A7670000
    2"7/16"11/32"Rockwell B80591410A6770000
    2 1/4"7/16"11/32"Rockwell B80191410A7680000
    2 1/2"7/16"11/32"Rockwell B80191410A7690000
    3"7/16"11/32"Rockwell B80191410A7710000
    4"7/16"11/32"Rockwell B80191410A77300000
     
    1/2"-13
    5/8"1/2"25/64"Rockwell B80591410A7760000
    3/4"1/2"25/64"Rockwell B801091410A71000000
    1"1/2"25/64"Rockwell B801091410A71200000
    1 1/4"1/2"25/64"Rockwell B801091410A71400000
    1 1/2"1/2"25/64"Rockwell B801091410A71600000
    2"1/2"25/64"Rockwell B801091410A72000000
    2 1/4"1/2"25/64"Rockwell B80191410A7790000
    2 1/2"1/2"25/64"Rockwell B801091410A72200000
    2 3/4"1/2"25/64"Rockwell B80191410A7810000
    3"1/2"25/64"Rockwell B80591410A72400000
    3 1/4"1/2"25/64"Rockwell B80191410A78200000
    3 1/2"1/2"25/64"Rockwell B80591410A72600000
    4"1/2"25/64"Rockwell B80591410A72800000
    4 1/2"1/2"25/64"Rockwell B80191410A7830000
    5"1/2"25/64"Rockwell B80191410A7300000
    6"1/2"25/64"Rockwell B80191410A7350000
    8"1/2"25/64"Rockwell B80191410A78400000
    10"1/2"25/64"Rockwell B80191410A78500000
     
    5/8"-11
    3/4"5/8"31/64"Rockwell B80191410A7860000
    1"5/8"31/64"Rockwell B80191410A7870000
    1 1/4"5/8"31/64"Rockwell B80191410A7880000
    1 1/2"5/8"31/64"Rockwell B80591410A79800000
    1 3/4"5/8"31/64"Rockwell B80191410A7890000
    2"5/8"31/64"Rockwell B80591410A80200000
    2 1/4"5/8"31/64"Rockwell B80191410A7910000
    2 1/2"5/8"31/64"Rockwell B80191410A8040000
    2 3/4"5/8"31/64"Rockwell B80191410A7920000
    3"5/8"31/64"Rockwell B80191410A8060000
    3 1/2"5/8"31/64"Rockwell B80191410A8080000
    4"5/8"31/64"Rockwell B80191410A8100000
    4 1/2"5/8"31/64"Rockwell B80191410A7930000
    5"5/8"31/64"Rockwell B80191410A8140000
    5 1/2"5/8"31/64"Rockwell B80191410A79400000
    6"5/8"31/64"Rockwell B80191410A8180000
    8"5/8"31/64"Rockwell B80191410A79500000
    10"5/8"31/64"Rockwell B80191410A79600000
     
    3/4"-10
    2"3/4"37/64"Rockwell B80191410A8430000
    2 1/2"3/4"37/64"Rockwell B80191410A8450000
    3"3/4"37/64"Rockwell B80191410A8470000
    3 1/2"3/4"37/64"Rockwell B80191410A8490000
    4"3/4"37/64"Rockwell B80191410A8510000
    5"3/4"37/64"Rockwell B80191410A8550000
    6"3/4"37/64"Rockwell B80191410A85900000
     
    7/8"-9
    2"7/8"21/32"Rockwell B80191410A95100000
    3"7/8"21/32"Rockwell B80191410A95200000
    4"7/8"43/64"Rockwell B80191410A71100000
    5"7/8"21/32"Rockwell B80191410A95300000
    6"7/8"43/64"Rockwell B80191410A89600000
    8"7/8"21/32"Rockwell B80191410A95400000
    12"7/8"21/32"Rockwell B80191410A95600000
     
    1"-8
    2"1"25/32"Rockwell B80191410A95700000
    3"1"25/32"Rockwell B80191410A95800000
    4"1"25/32"Rockwell B80191410A92000000
    5"1"25/32"Rockwell B80191410A92600000
    6"1"25/32"Rockwell B80191410A92800000
    8"1"25/32"Rockwell B80191410A95900000
     
    1 1/8"-7
    6"1 1/8"27/32"Rockwell B80191410A96700000
    8"1 1/8"27/32"Rockwell B80191410A96800000
    10"1 1/8"27/32"Rockwell B80191410A96900000
     
    1 1/4"-7
    4"1 1/4"15/16"Rockwell B80191410A97300000
    5"1 1/4"15/16"Rockwell B80191410A97400000
    6"1 1/4"15/16"Rockwell B80191410A97500000
     

    External-Square-Drive Steel Extended-Tip Set Screws

    Image of Product. Front orientation. Set Screws. External-Square-Drive Steel Extended-Tip Set Screws.
    Tighten these screws to locate and hold components without worrying about your sockets slipping. Four large, flat sides give you reliable torque but slightly less than external hex drives. Like a dowel pin, the tip slides into mating holes on shafts, tubing, and other surfaces. Made of alloy steel, they're strong enough to hold components without wearing down. Also known as half dog-point set screws.
    Black-Oxide Alloy Steel—These screws have a dark matte finish that offers minimal corrosion resistance, so they're best for dry environments.
    Tip
    Head
    Lg.
    Dia.
    Lg.
    Wd.
    Ht.
    Hardness
    Pkg.
    Qty.
    Pkg.
    Black-Oxide Alloy Steel
     
    1/4"-20
    1/2"0.156"0.063"1/4"3/16"Rockwell C45191418A54000000
    1"0.156"0.063"1/4"3/16"Rockwell C45191418A5420000
    2"0.156"0.063"1/4"3/16"Rockwell C45191418A5500000
     
    5/16"-18
    1"0.203"0.078"5/16"15/64"Rockwell C45191418A5830000
    1 1/4"0.203"0.078"5/16"15/64"Rockwell C45191418A5850000
    1 1/2"0.203"0.078"5/16"15/64"Rockwell C45191418A5870000
     
    3/8"-16
    3/4"0.25"0.094"3/8"9/32"Rockwell C45191418A6220000
    1"0.25"0.094"3/8"9/32"Rockwell C45191418A6250000
    1 1/4"0.25"0.094"3/8"9/32"Rockwell C45191418A6260000
    1 1/2"0.25"0.094"3/8"9/32"Rockwell C45191418A6280000
    2"0.25"0.094"3/8"9/32"Rockwell C45191418A6320000
    2 1/2"0.25"0.094"3/8"9/32"Rockwell C45191418A6340000
    3"0.25"0.094"3/8"9/32"Rockwell C45191418A6360000
     
    1/2"-13
    1"0.344"0.125"1/2"3/8"Rockwell C45191418A7120000
    1 1/4"0.344"0.125"1/2"3/8"Rockwell C45191418A7140000
    1 1/2"0.344"0.125"1/2"3/8"Rockwell C45191418A7160000
    2"0.344"0.125"1/2"3/8"Rockwell C45191418A7200000
    2 1/2"0.344"0.125"1/2"3/8"Rockwell C45191418A7220000
    3"0.344"0.125"1/2"3/8"Rockwell C45191418A7240000
    4"0.344"0.125"1/2"3/8"Rockwell C45191418A73000000
     
    5/8"-11
    2"0.469"0.156"5/8"15/32"Rockwell C45191418A80200000
    3"0.469"0.156"5/8"15/32"Rockwell C45191418A80600000
    4"0.469"0.156"5/8"15/32"Rockwell C45191418A81000000
    5"0.469"0.156"5/8"15/32"Rockwell C45191418A81400000
     
    3/4"-10
    2"0.563"0.188"3/4"9/16"Rockwell C45191418A84300000
    2 1/2"0.563"0.188"3/4"9/16"Rockwell C45191418A84500000
    3"0.563"0.188"3/4"9/16"Rockwell C45191418A84700000
    4"0.563"0.188"3/4"9/16"Rockwell C45191418A85100000
    5"0.563"0.188"3/4"9/16"Rockwell C45191418A85500000
     
    Alloy Steel
     
    M6 × 1 mm
    12 mm4 mm1.75 mm6 mm6 mmRockwell C201092635A2540000
    16 mm4 mm1.75 mm6 mm6 mmRockwell C201092635A2560000
    20 mm4 mm1.75 mm6 mm6 mmRockwell C201092635A2580000
    25 mm4 mm1.75 mm6 mm6 mmRockwell C201092635A2600000
    35 mm4 mm1.75 mm6 mm6 mmRockwell C201092635A26400000
     
    M8 × 1.25 mm
    25 mm5.5 mm2.25 mm8 mm8 mmRockwell C22592635A3140000
    30 mm5.5 mm2.25 mm8 mm8 mmRockwell C22592635A3160000
    35 mm5.5 mm2.25 mm8 mm8 mmRockwell C22592635A3180000
    40 mm5.5 mm2.25 mm8 mm8 mmRockwell C22592635A3200000
    50 mm5.5 mm2.25 mm8 mm8 mmRockwell C22592635A3240000
     
    M10 × 1.5 mm
    25 mm7 mm2.75 mm10 mm10 mmRockwell C22592635A35200000
    30 mm7 mm2.75 mm10 mm10 mmRockwell C22592635A3540000
    35 mm7 mm2.75 mm10 mm10 mmRockwell C22592635A35500000
    40 mm7 mm2.75 mm10 mm10 mmRockwell C22592635A35800000
    50 mm7 mm2.75 mm10 mm10 mmRockwell C22592635A36300000
    60 mm7 mm2.75 mm10 mm10 mmRockwell C22592635A37000000
     
    M12 × 1.75 mm
    35 mm8.5 mm3.25 mm13 mm12 mmRockwell C22192635A4190000
    40 mm8.5 mm3.25 mm13 mm12 mmRockwell C22192635A4210000
    50 mm8.5 mm3.25 mm13 mm12 mmRockwell C22192635A4260000
    60 mm8.5 mm3.25 mm13 mm12 mmRockwell C22192635A4300000
    70 mm8.5 mm3.25 mm13 mm12 mmRockwell C22192635A4330000
    80 mm8.5 mm3.25 mm13 mm12 mmRockwell C22192635A4360000
    100 mm8.5 mm3.25 mm13 mm12 mmRockwell C22192635A43900000
     
    M16 × 2 mm
    50 mm12 mm4.3 mm17 mm16 mmRockwell C22192635A5400000
    60 mm12 mm4.3 mm17 mm16 mmRockwell C22192635A5430000
    80 mm12 mm4.3 mm17 mm16 mmRockwell C22192635A5460000
    100 mm12 mm4.3 mm17 mm16 mmRockwell C22192635A54900000
     
    M20 × 2.5 mm
    60 mm15 mm5.3 mm22 mm20 mmRockwell C23192635A63300000
    70 mm15 mm5.3 mm22 mm20 mmRockwell C23192635A63600000
    80 mm15 mm5.3 mm22 mm20 mmRockwell C23192635A63900000
    100 mm15 mm5.3 mm22 mm20 mmRockwell C23192635A64100000
     

    External-Square-Drive Stainless Steel Cup-Tip Set Screws

    Image of Product. Front orientation. Set Screws. External-Square-Drive Stainless Steel Cup-Tip Set Screws.
    These corrosion-resistant screws have large, flat sides that prevent sockets from slipping. Since they have four contact points, they also give you reliable torque but slightly less than external hex drives. Made of stainless steel, they won't rust, but they're not as strong as alloy steel. The tip has thin edges that dig into surfaces for a secure hold. These screws often lock gears, pulleys, and other transmission components onto shafts.
    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.
    Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these screws won't degrade when exposed to harsh weather, salt water, and most chemicals.
    Head
    Lg.
    Wd.
    Ht.
    Hardness
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1/4"-20
    3/8"1/4"3/16"Rockwell B801092308A53500000
    1/2"1/4"3/16"Rockwell B801092308A5370000
    5/8"1/4"3/16"Rockwell B801092308A5380000
    3/4"1/4"3/16"Rockwell B801092308A5400000
    1"1/4"3/16"Rockwell B801092308A5420000
    1 1/4"1/4"3/16"Rockwell B801092308A54400000
    1 1/2"1/4"3/16"Rockwell B801092308A54600000
     
    5/16"-18
    1/2"5/16"1/4"Rockwell B801092308A57500000
    5/8"5/16"1/4"Rockwell B801092308A59100000
    3/4"5/16"1/4"Rockwell B801092308A58100000
    1"5/16"1/4"Rockwell B801092308A58300000
    1 1/4"5/16"1/4"Rockwell B801092308A59500000
    1 1/2"5/16"1/4"Rockwell B801092308A59700000
     
    3/8"-16
    3/4"3/8"19/64"Rockwell B801092308A62200000
    1"3/8"19/64"Rockwell B801092308A62400000
    1 1/4"3/8"19/64"Rockwell B80592308A6260000
    1 1/2"3/8"19/64"Rockwell B80592308A6280000
    2"3/8"19/64"Rockwell B80592308A63200000
    2 1/2"3/8"19/64"Rockwell B80192308A6360000
    3"3/8"19/64"Rockwell B80192308A6390000
     
    1/2"-13
    3/4"1/2"25/64"Rockwell B80592308A71000000
    1"1/2"25/64"Rockwell B80592308A71200000
    1 1/4"1/2"25/64"Rockwell B80192308A7140000
    1 1/2"1/2"25/64"Rockwell B80192308A7160000
    2"1/2"25/64"Rockwell B80192308A7200000
    2 1/2"1/2"25/64"Rockwell B80192308A7240000
    3"1/2"25/64"Rockwell B80192308A7260000
    3 1/2"1/2"25/64"Rockwell B80192308A7320000
    4"1/2"25/64"Rockwell B80192308A7360000
     
    5/8"-11
    1 1/2"5/8"31/64"Rockwell B70192308A8060000
    2"5/8"31/64"Rockwell B70192308A8110000
    3"5/8"31/64"Rockwell B70192308A8180000
    4"5/8"31/64"Rockwell B70192308A8250000
     
    3/4"-10
    2"3/4"37/64"Rockwell B70192308A9330000
    3"3/4"37/64"Rockwell B70192308A9380000
    4"3/4"37/64"Rockwell B70192308A94600000
    5"3/4"37/64"Rockwell B70192308A94900000
     
    Highly Corrosion-Resistant 316 Stainless Steel
     
    1/4"-20
    1/2"1/4"3/16"Rockwell B801094087A1140000
    3/4"1/4"3/16"Rockwell B801094087A1160000
    1"1/4"3/16"Rockwell B801094087A1180000
     
    5/16"-18
    3/4"5/16"1/4"Rockwell B801094087A12300000
    1"5/16"1/4"Rockwell B80594087A12700000
     
    3/8"-16
    1"3/8"19/64"Rockwell B80594087A1310000
    1 1/4"3/8"19/64"Rockwell B80594087A13500000
    1 1/2"3/8"19/64"Rockwell B80194087A1390000
    2"3/8"19/64"Rockwell B80194087A1440000
     
    1/2"-13
    1"1/2"25/64"Rockwell B80194087A1620000
    1 1/4"1/2"25/64"Rockwell B80194087A1650000
    1 1/2"1/2"25/64"Rockwell B80194087A1680000
    2"1/2"25/64"Rockwell B80194087A1710000
    2 1/2"1/2"25/64"Rockwell B80194087A1750000
     
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