McMaster-Carr logo
    Filter by
    System of Measurement
    Length
    Minimum Hardness
    Key Type
    Tolerance Rating
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Hardness
    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)
    10 Products

    Machine Key Stock

    Cut this square or rectangular key stock to length to create a straight machine key. Straight keys are the most common type of key. Machine keys are often the same material as the shaft and other components with which they are used. To use a key as a sacrificial part, choose a softer key that will shear off when parts are exposed to excessive force, preventing damage to expensive equipment.
    400 Nickel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    400 nickel key stock is the most corrosion resistant key stock in our offering and can be used in highly corrosive environments, such as those involving salt water, sulfuric acid, and alkalies. For complete corrosion resistance, 400 nickel keys are typically used with 400 nickel machine parts. Comparable to Monel, 400 nickel is also known for its strength and weldability.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    Tolerance
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Each
    12" Long
    1/8" × 1/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B610000000000000
    3/16" × 3/16"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B61000000000000
    1/4" × 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B61000000000000
    3/8" × 3/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B610000000000000
    1/2" × 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B610000000000000
     
    36" Long
    1/8" × 1/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B610000000000000
    3/16" × 3/16"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B61000000000000
    1/4" × 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B610000000000000
    3/8" × 3/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B610000000000000
    1/2" × 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B610000000000000
     
    back to top