McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    181 Products

    Performance

    Performance

    Certification

    Undersized Dowel Pins

    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—198105A07700000
    3/8"-0.0002" to 0"750Rockwell C50—198105A0780000
    1/2"-0.0002" to 0"750Rockwell C50—198105A0790000
     
    3/32" Diameter
    1/4"-0.0002" to 0"1,400Rockwell C50—198105A0800000
    3/8"-0.0002" to 0"1,400Rockwell C50—198105A0810000
    1/2"-0.0002" to 0"1,400Rockwell C50—198105A0820000
    3/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2010000
     
    1/8" Diameter
    3/8"-0.0002" to 0"2,600Rockwell C50—198105A0830000
    1/2"-0.0002" to 0"2,600Rockwell C50—198105A0840000
    5/8"-0.0002" to 0"2,600Rockwell C50—198105A0850000
    3/4"-0.0002" to 0"2,600Rockwell C50—198105A0860000
    7/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2020000
    1"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2030000
    1 1/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2040000
    1 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2050000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2060000
     
    3/16" Diameter
    3/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2070000
    1/2"-0.0002" to 0"5,900Rockwell C50—198105A0870000
    5/8"-0.0002" to 0"5,900Rockwell C50—198105A0880000
    3/4"-0.0002" to 0"5,900Rockwell C50—198105A0890000
    7/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2080000
    1"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2090000
    1 1/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2100000
    1 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2110000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2120000
     
    1/4" Diameter
    3/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2130000
    1/2"-0.0002" to 0"10,000Rockwell C50—198105A0900000
    5/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2140000
    3/4"-0.0002" to 0"10,000Rockwell C50—198105A0910000
    7/8"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2150000
    1"-0.0002" to 0"10,000Rockwell C50—198105A0920000
    1 1/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2160000
    1 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2170000
    1 3/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2180000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2190000
    2 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2200000
    3"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2210000
     
    5/16" Diameter
    3/4"-0.0002" to 0"16,000Rockwell C50—198105A0930000
    1"-0.0002" to 0"16,000Rockwell C50—198105A0940000
    1 1/4"-0.0002" to 0"16,000Rockwell C50—198105A0950000
    1 1/2"-0.0002" to 0"16,000Rockwell C50—198105A0960000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2220000
     
    3/8" Diameter
    1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2230000
    3/4"-0.0002" to 0"23,000Rockwell C50—198105A0970000
    1"-0.0002" to 0"23,000Rockwell C50—198105A0980000
    1 1/4"-0.0002" to 0"23,000Rockwell C50—198105A0990000
    1 1/2"-0.0002" to 0"23,000Rockwell C50—198105A1000000
    1 3/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2240000
    2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2250000
    2 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A22600000
    3"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A22700000
     
    1/2" Diameter
    1"-0.0002" to 0"42,000Rockwell C50—198105A1010000
    1 1/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2280000
    1 1/2"-0.0002" to 0"42,000Rockwell C50—198105A1020000
    1 3/4"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2290000
    2"-0.0002" to 0"42,000Rockwell C50—198105A1030000
    2 1/2"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A2300000
    3"-0.0002" to 0"Not RatedRockwell C48ASME B18.8.2198105A23100000
     
    Machinable Carbon Steel
     
    2 mm Diameter
    4 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A2010000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A2020000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A2030000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A2040000
     
    3 mm Diameter
    6 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A20500000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A20600000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A20700000
    12 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A20800000
    16 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A32900000
    20 mm-0.014 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A33000000
     
    4 mm Diameter
    8 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A20900000
    10 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h810097049A21100000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A21200000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A3310000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A21300000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A3320000
     
    5 mm Diameter
    10 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A33300000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A21400000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A33400000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A21500000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A21600000
     
    6 mm Diameter
    12 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A21700000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A21800000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A21900000
    24 mm-0.018 mm to 0 mmNot RatedRockwell B68ISO 2338-h85097049A22100000
     
    8 mm Diameter
    16 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h82597049A22200000
    18 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h82597049A22300000
    20 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h82597049A22400000
    24 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h82597049A22500000
    30 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h81097049A3350000
     
    10 mm Diameter
    20 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h8597049A2260000
    24 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h8597049A2270000
    30 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h8597049A3360000
    32 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h8597049A2280000
    40 mm-0.022 mm to 0 mmNot RatedRockwell B68ISO 2338-h8597049A2290000
     
    12 mm Diameter
    30 mm-0.027 mm to 0 mmNot RatedRockwell B68ISO 2338-h8597049A23100000
    40 mm-0.027 mm to 0 mmNot RatedRockwell B68ISO 2338-h8597049A2320000
    50 mm-0.027 mm to 0 mmNot RatedRockwell B68ISO 2338-h8597049A23300000
     
    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-21143/2-26198105A05000000
    3/8"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-28198105A0510000
    1/2"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-30198105A0520000
     
    3/32" Diameter
    1/4"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-46198105A0530000
    3/8"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-48198105A0540000
    1/2"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-50198105A0550000
     
    1/8" Diameter
    3/8"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-68198105A0560000
    1/2"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-70198105A0570000
    5/8"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-71198105A0580000
    3/4"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-72198105A0590000
     
    3/16" Diameter
    1/2"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-110198105A0600000
    5/8"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-111198105A0610000
    3/4"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-112198105A0620000
     
    1/4" Diameter
    1/2"-0.0002" to 0"Not RatedRockwell B83—MIL-P-21143/2-150198105A0630000
    3/4"-0.0002" to 0"Not RatedRockwell B83——198105A0640000
    1"-0.0002" to 0"Not RatedRockwell B83——198105A0650000
     
    5/16" Diameter
    3/4"-0.0002" to 0"Not RatedRockwell B83——198105A0660000
    1"-0.0002" to 0"Not RatedRockwell B83——198105A0670000
    1 1/4"-0.0002" to 0"Not RatedRockwell B83——198105A0680000
    1 1/2"-0.0002" to 0"Not RatedRockwell B83——198105A0690000
     
    3/8" Diameter
    3/4"-0.0002" to 0"Not RatedRockwell B83——198105A0700000
    1"-0.0002" to 0"Not RatedRockwell B83——198105A0710000
    1 1/4"-0.0002" to 0"Not RatedRockwell B83——198105A0720000
    1 1/2"-0.0002" to 0"Not RatedRockwell B83——198105A0730000
     
    1/2" Diameter
    1"-0.0002" to 0"Not RatedRockwell B83——198105A0740000
    1 1/2"-0.0002" to 0"Not RatedRockwell B83——198105A0750000
    2"-0.0002" to 0"Not RatedRockwell B83——198105A0760000
     
    1 mm Diameter
    4 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—10097049A30100000
    5 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—10097049A30200000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—10097049A30300000
     
    1.5 mm Diameter
    4 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A3040000
    5 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A3050000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A3060000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A3070000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A3080000
     
    2 mm Diameter
    4 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—10097049A10100000
    5 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A3090000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—10097049A10200000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—10097049A10300000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—10097049A10400000
    12 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A31000000
    16 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A31100000
     
    2.5 mm Diameter
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A31200000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A31300000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A31400000
     
    3 mm Diameter
    5 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A31500000
    6 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—10097049A10500000
    8 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A10600000
    10 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A10700000
    12 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A10800000
    14 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A31600000
    16 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A31700000
    20 mm-0.014 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A3180000
     
    4 mm Diameter
    6 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A3190000
    8 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A10900000
    10 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A11100000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A11200000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A3200000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—5097049A11300000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A32100000
     
    5 mm Diameter
    8 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A3220000
    10 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A32300000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A11400000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A3240000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A11500000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A11600000
     
    6 mm Diameter
    10 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—1097049A3250000
    12 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A11700000
    14 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—1097049A3260000
    16 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A11800000
    18 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—1097049A3270000
    20 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—2597049A11900000
    24 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A1210000
    30 mm-0.018 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—1097049A32800000
     
    8 mm Diameter
    16 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A1220000
    18 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A1230000
    20 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A1240000
    24 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A12500000
     
    10 mm Diameter
    20 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A1260000
    24 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A12700000
    32 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A12800000
    40 mm-0.022 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A12900000
     
    12 mm Diameter
    30 mm-0.027 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—597049A13100000
    40 mm-0.027 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—197049A1320000
    50 mm-0.027 mm to 0 mmNot RatedRockwell B95ISO 2338-h8—197049A1330000
     
    back to top