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    181 Products

    Undersized Dowel Pins
    3D CAD models available

    You don’t need to create precise holes for these pins when aligning parts you plan to bolt together. They have a slightly undersized diameter to slip into place without the need for special installation tools, like an arbor press. Undersized pins are also used for prototyping and positioning components you need to assemble and disassemble frequently.
    Steel
    Image of Product. Front orientation. Dowel Pins. Undersized Tolerance, Plain Head.
    High-Strength Alloy Steel—Our strongest, most wear-resistant pins, these won't bend or break from vibration. Use them for high-stress applications, such as mounting and aligning hydraulic cylinders and injection molds. They perform best in dry environments since moisture will cause them to rust.
    Machinable Carbon Steel—Made of 12L14 carbon steel, these pins are the easiest to machine, so you can shape them if they don't quite match your hole dimensions. Stronger than stainless steel but not quite as strong as alloy steel, they won't deform from stress and vibration. Pins perform best in dry environments since moisture will cause them to rust.
    Lg.
    Dia. Tolerance
    Double Shear
    Breaking
    Strength, lbf
    Min.
    Hardness
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    High-Strength Alloy Steel
     
    1/16" Diameter
    1/4"-0.0002" to 0"750Rockwell C50__100000000000000
    3/8"-0.0002" to 0"750Rockwell C50__10000000000000
    1/2"-0.0002" to 0"750Rockwell C50__10000000000000
     
    3/32" Diameter
    1/4"-0.0002" to 0"1,400Rockwell C50__10000000000000
    3/8"-0.0002" to 0"1,400Rockwell C50__10000000000000
    1/2"-0.0002" to 0"1,400Rockwell C50__10000000000000
    3/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
     
    1/8" Diameter
    3/8"-0.0002" to 0"2,600Rockwell C50__10000000000000
    1/2"-0.0002" to 0"2,600Rockwell C50__10000000000000
    5/8"-0.0002" to 0"2,600Rockwell C50__10000000000000
    3/4"-0.0002" to 0"2,600Rockwell C50__10000000000000
    7/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1 1/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
     
    3/16" Diameter
    3/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1/2"-0.0002" to 0"5,900Rockwell C50__10000000000000
    5/8"-0.0002" to 0"5,900Rockwell C50__10000000000000
    3/4"-0.0002" to 0"5,900Rockwell C50__10000000000000
    7/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1 1/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
     
    1/4" Diameter
    3/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1/2"-0.0002" to 0"10,000Rockwell C50__10000000000000
    5/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    3/4"-0.0002" to 0"10,000Rockwell C50__10000000000000
    7/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1"-0.0002" to 0"10,000Rockwell C50__10000000000000
    1 1/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1 3/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    2 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    3"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
     
    5/16" Diameter
    3/4"-0.0002" to 0"16,000Rockwell C50__10000000000000
    1"-0.0002" to 0"16,000Rockwell C50__10000000000000
    1 1/4"-0.0002" to 0"16,000Rockwell C50__10000000000000
    1 1/2"-0.0002" to 0"16,000Rockwell C50__10000000000000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
     
    3/8" Diameter
    1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    3/4"-0.0002" to 0"23,000Rockwell C50__10000000000000
    1"-0.0002" to 0"23,000Rockwell C50__10000000000000
    1 1/4"-0.0002" to 0"23,000Rockwell C50__10000000000000
    1 1/2"-0.0002" to 0"23,000Rockwell C50__10000000000000
    1 3/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    2 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2100000000000000
    3"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2100000000000000
     
    1/2" Diameter
    1"-0.0002" to 0"42,000Rockwell C50__10000000000000
    1 1/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    1 1/2"-0.0002" to 0"42,000Rockwell C50__10000000000000
    1 3/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    2"-0.0002" to 0"42,000Rockwell C50__10000000000000
    2 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.210000000000000
    3"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2100000000000000
     
    Machinable Carbon Steel
     
    2 mm Diameter
    4 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h81000000000000000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h81000000000000000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h81000000000000000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h81000000000000000
     
    3 mm Diameter
    6 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810000000000000000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810000000000000000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810000000000000000
    12 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810000000000000000
    16 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    20 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
     
    4 mm Diameter
    8 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h810000000000000000
    10 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h810000000000000000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h8500000000000000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h8500000000000000
     
    5 mm Diameter
    10 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
     
    6 mm Diameter
    12 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
    24 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85000000000000000
     
    8 mm Diameter
    16 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h82500000000000000
    18 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h82500000000000000
    20 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h82500000000000000
    24 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h82500000000000000
    30 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h8100000000000000
     
    10 mm Diameter
    20 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h850000000000000
    24 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h850000000000000
    30 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h850000000000000
    32 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h850000000000000
    40 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h850000000000000
     
    12 mm Diameter
    30 mm-0.027 mm to 0 mmNot RatedRockwell B68ISO 2338-h8500000000000000
    40 mm-0.027 mm to 0 mmNot RatedRockwell B68ISO 2338-h850000000000000
    50 mm-0.027 mm to 0 mmNot RatedRockwell B68ISO 2338-h8500000000000000
     
    Corrosion-Resistant Stainless Steel
    Image of Product. Front orientation. Dowel Pins. Undersized Tolerance, Plain Head.
    18-8 Stainless Steel—The choice for wet and outdoor environments. In addition to resisting rust, these pins also withstand mild chemicals such as cleaners and degreasers. They are strong enough to join most components but won't withstand extreme stress and vibration as well as steel.
    Lg.
    Dia. Tolerance
    Double Shear
    Breaking
    Strength
    Min.
    Hardness
    Specs. Met
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1/16" Diameter
    1/4"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-26100000000000000
    3/8"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-2810000000000000
    1/2"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-3010000000000000
     
    3/32" Diameter
    1/4"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-4610000000000000
    3/8"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-4810000000000000
    1/2"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-5010000000000000
     
    1/8" Diameter
    3/8"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-6810000000000000
    1/2"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-7010000000000000
    5/8"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-7110000000000000
    3/4"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-7210000000000000
     
    3/16" Diameter
    1/2"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-11010000000000000
    5/8"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-11110000000000000
    3/4"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-11210000000000000
     
    1/4" Diameter
    1/2"-0.0002" to 0"Not RatedRockwell B83__MIL-P-21143/2-15010000000000000
    3/4"-0.0002" to 0"Not RatedRockwell B83____10000000000000
    1"-0.0002" to 0"Not RatedRockwell B83____10000000000000
     
    5/16" Diameter
    3/4"-0.0002" to 0"Not RatedRockwell B83____10000000000000
    1"-0.0002" to 0"Not RatedRockwell B83____10000000000000
    1 1/4"-0.0002" to 0"Not RatedRockwell B83____10000000000000
    1 1/2"-0.0002" to 0"Not RatedRockwell B83____10000000000000
     
    3/8" Diameter
    3/4"-0.0002" to 0"Not RatedRockwell B83____10000000000000
    1"-0.0002" to 0"Not RatedRockwell B83____10000000000000
    1 1/4"-0.0002" to 0"Not RatedRockwell B83____10000000000000
    1 1/2"-0.0002" to 0"Not RatedRockwell B83____10000000000000
     
    1/2" Diameter
    1"-0.0002" to 0"Not RatedRockwell B83____10000000000000
    1 1/2"-0.0002" to 0"Not RatedRockwell B83____10000000000000
    2"-0.0002" to 0"Not RatedRockwell B83____10000000000000
     
    1 mm Diameter
    4 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000000
    5 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000000
     
    1.5 mm Diameter
    4 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
    5 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
     
    2 mm Diameter
    4 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000000
    5 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000000
    12 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    16 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
     
    2.5 mm Diameter
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
     
    3 mm Diameter
    5 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    12 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    14 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    16 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    20 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__250000000000000
     
    4 mm Diameter
    6 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__250000000000000
    8 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    10 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__250000000000000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__5000000000000000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__2500000000000000
     
    5 mm Diameter
    8 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__250000000000000
    10 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__2500000000000000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__2500000000000000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__250000000000000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__2500000000000000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__2500000000000000
     
    6 mm Diameter
    10 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__100000000000000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__2500000000000000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__100000000000000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__2500000000000000
    18 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__100000000000000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__2500000000000000
    24 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__50000000000000
    30 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__1000000000000000
     
    8 mm Diameter
    16 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__50000000000000
    18 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__50000000000000
    20 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__50000000000000
    24 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
     
    10 mm Diameter
    20 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__50000000000000
    24 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
    32 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
    40 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
     
    12 mm Diameter
    30 mm-0.027 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__500000000000000
    40 mm-0.027 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000
    50 mm-0.027 mm to 0 mmNot RatedRockwell B95ISO 2338-h8__10000000000000
     
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