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    54 Products

    Mil. Spec. Cotter Pins

    These pins are manufactured and tested to strict U.S. military standards for material and construction. They lock the ends of clevis pins and shafts to keep components in place. Slide pins into a hole and then bend the prongs outward with pliers to secure. Also known as split pins, one prong is slightly longer than the other for easy opening once inserted. Repeated bending will weaken the pin, so they should not be reused.
    Steel
    Image of Product. Front orientation. Contains Annotated. Cotter Pins. Mil. Spec. Cotter Pins.
    Cadmium Yellow-Chromate-Plated Carbon Steel—The plating creates a barrier against rust, so these pins are suitable for most wet and outdoor environments.
    Lg.
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Cadmium Yellow-Chromate-Plated Carbon Steel
     
    1/16" Diameter
    1/2"MS24665-13210090157A101000000
    3/4"MS24665-13410090157A10200000
    1"MS24665-13610090157A10300000
     
    3/32" Diameter
    1/2"MS24665-28110090157A10400000
    3/4"MS24665-28310090157A10500000
    1"MS24665-2855090157A1060000
    1 1/2"MS24665-2895090157A1070000
    2"MS24665-2922590157A1080000
     
    1/8" Diameter
    3/4"MS24665-3515090157A1090000
    1"MS24665-3535090157A11100000
    1 1/4"MS24665-3552590157A1120000
    1 1/2"MS24665-3572590157A1130000
    1 3/4"MS24665-3592590157A1140000
    2"MS24665-3602590157A1150000
    2 1/2"MS24665-3621090157A1160000
     
    5/32" Diameter
    1"MS24665-4192590157A1170000
    1 1/2"MS24665-4232590157A1180000
    2"MS24665-4261090157A1190000
     
    3/16" Diameter
    2 1/2"MS24665-5001090157A1230000
    3"MS24665-5021090157A12400000
     
    1/4" Diameter
    1 1/2"MS24665-6231090157A1250000
    2"MS24665-625590157A1260000
    2 1/2"MS24665-627590157A1270000
    3"MS24665-628590157A1280000
    4"MS24665-630190157A1290000
     
    3/8" Diameter
    2"MS24665-749290157A1310000
    3"MS24665-752290157A1320000
    4"MS24665-754290157A1330000
    5"MS24665-756290157A1340000
     

    Clevis Pins

    The most commonly used clevis pins—just slide a cotter pin into the hole to secure parts. These pins have a flat, low-profile head to fit in tight spaces. They're less likely to get in the way than pins with a loop grip or T-handle but aren’t as easy to grab if you want to remove them frequently. Add your own cotter pin, or choose a clevis pin that includes a reusable hairpin cotter.
    Heat-Treated Steel
    Image of Product. Front orientation. Contains Annotated. Clevis Pins. Clevis Pins, Cadmium Yellow-Chromate-Plated Alloy Steel.

    Cadmium

    Yellow-Chromate-Plated

    Alloy Steel

    With additional hardness, these pins are less likely to bend, break, and wear than those that aren't heat treated.
    Cadmium Yellow-Chromate-Plated Alloy Steel—The plating creates a barrier against rust, so these pins are suitable for most wet and outdoor environments.
    Military Specification—Manufactured and tested to meet strict U.S. military standards for material and construction.
    Head
    Usable
    Lg.
    Dia. Tolerance
    For Max.
    Cotter Pin Dia.
    Min.
    Hardness
    Mil. Spec.
    Lg.
    Dia.
    Ht.
    Pkg.
    Qty.
    Pkg.
    Cadmium Yellow-Chromate-Plated Alloy Steel
     
    3/16" Diameter
    11/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-2C11, NASM2039215/32"5/16"3/64"194344A11000000
    17/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-2C17, NASM2039221/32"5/16"3/64"194344A1200000
    23/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-2C23, NASM2039227/32"5/16"3/64"194344A1300000
    29/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-2C29, NASM203921 1/32"5/16"3/64"194344A1400000
    1 3/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-2C35, NASM203921 7/32"5/16"3/64"194344A1500000
    1 9/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-2C41, NASM203921 13/32"5/16"3/64"194344A1600000
    1 15/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-2C47, NASM203921 19/32"5/16"3/64"194344A1700000
     
    1/4" Diameter
    17/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-3C17, NASM2039221/32"3/8"1/16"194344A1800000
    23/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-3C23, NASM203927/8"3/8"1/16"194344A1900000
    29/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-3C29, NASM203921 1/32"3/8"1/16"194344A2100000
    1 3/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-3C35, NASM203921 7/32"3/8"1/16"194344A2200000
    1 9/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-3C41, NASM203921 13/32"3/8"1/16"194344A2300000
    1 15/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-3C47, NASM203921 5/8"3/8"1/16"194344A2400000
    1 21/32"-0.002" to 0.000"1/16"Rockwell C26MS20392-3C53, NASM203921 25/32"3/8"1/16"194344A2500000
     
    5/16" Diameter
    17/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-4C17, NASM2039223/32"7/16"1/16"194344A2600000
    23/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-4C23, NASM2039229/32"7/16"1/16"194344A2700000
    29/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-4C29, NASM203921 3/32"7/16"1/16"194344A2800000
    1 3/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-4C35, NASM203921 9/32"7/16"1/16"194344A2900000
    1 9/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-4C41, NASM203921 15/32"7/16"1/16"194344A3100000
    1 15/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-4C47, NASM203921 21/32"7/16"1/16"194344A3200000
     
    3/8" Diameter
    19/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-5C19, NASM2039225/32"1/2"1/16"194344A3300000
    23/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-5C23, NASM2039229/32"1/2"1/16"194344A3400000
    1 3/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-5C35, NASM203921 9/32"1/2"1/16"194344A3500000
    1 9/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-5C41, NASM203921 15/32"1/2"1/16"194344A3600000
    1 15/32"-0.002" to 0.000"3/32"Rockwell C26MS20392-5C47, NASM203921 21/32"1/2"1/16"194344A3700000
     
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