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    9 Products

    Threads per Inch and Thread Pitch Identifiers

    Image of ProductInUse. Front orientation. Contains Border. Thread Size Identifiers. Threads per Inch and Thread Pitch Identifiers.
    Image of Product. Front orientation. Thread Size Identifiers. Threads per Inch and Thread Pitch Identifiers.
    Determine threads per inch and thread pitch on nuts, bolts, and other fasteners. Identifiers in a variety of sizes are riveted together in a fan design—pull one out and hold it against your threads to see if it fits. Once you’ve found a match, fold identifiers in to store them in your pocket or tool bag.
    Folded
    For Use With
    For Thread
    Type
    For Thread
    Location
    For Threads per Inch
    For Thread Pitch, mm
    No. of
    Identifiers
    Lg.
    Wd.
    Mfr.
    Mfr. Model
    No.
    Each
    Inch
     
    Steel
    Screws, Bolts, Threaded Rods, NutsBSWExternal/Internal3 1/2, 4, 4 1/2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 36, 40, 44, 48,
    50, 60    		—302"1/2"Starrett47600000000000000
    Screws, Bolts, Threaded Rods, NutsUNC/UNFExternal/Internal2 1/4, 2 3/8, 2 1/2, 2 5/8, 2 3/4, 2 7/8, 3, 3 1/4, 3 1/2, 4, 4 1/2, 5, 5 1/2, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18,
    20, 24, 28    		—273 1/2"7/8"Starrett1550000000000000
    Screws, Bolts, Threaded Rods, NutsUNC/UNFExternal/Internal3 1/2, 4, 4 1/2, 5, 5 1/2, 6, 7, 8, 9, 10, 11, 11 1/2, 12, 13, 14, 15, 16, 18, 20, 22, 24, 26, 27, 28, 30, 32,
    34, 36    		—282 1/2"5/8"Starrett4840000000000000
    Screws, Bolts, Threaded Rods, NutsUNC/UNFExternal/Internal4, 4 1/2, 5, 5 1/2, 6, 7, 8, 9, 10, 11, 11 1/2, 12, 13, 14, 15, 16, 18, 20, 22, 24, 26, 27, 28, 30, 32, 34, 36,
    38, 40, 42    		—302 5/8"5/8"Starrett60000000000000
    Screws, Bolts, Threaded Rods, NutsUNC/UNFExternal/Internal4, 4 1/2, 5, 5 1/2, 6, 7, 8, 9, 10, 11, 11 1/2, 12, 13, 14, 15, 16, 18, 20, 22, 24, 26, 27, 28, 30, 32, 34, 36,
    38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84    		—513 3/8"3/4"Starrett47200000000000000
    Screws, Bolts, Threaded Rods, NutsUNC/UNFExternal/Internal4, 4 1/2, 5, 6, 7, 8, 9, 10, 11, 11 1/2, 12, 13, 14, 16, 18, 20, 24, 27, 28, 32, 36, 40, 44, 48, 56, 64, 72, 80—282 1/2"5/8"Starrett4740000000000000
     
    Metric
     
    Steel
    Screws, Bolts, Threaded Rods, NutsMetric
    		External/Internal—0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 1, 1.1, 1.2, 1.25, 1.3, 1.4, 1.5, 1.6, 1.7, 1.75, 1.8, 1.9, 2, 2.5282 1/2"1/2"Starrett156M000000000000
    Screws, Bolts, Threaded Rods, NutsMetric
    		External/Internal—0.5, 0.75, 1, 1.1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5273 1/2"5/8"Starrett159M0000000000000
     

    Threads per Inch and Center Identifiers

    Image of Product. Front orientation. Thread Size Identifiers. Threads per Inch and Center Identifiers.
    Identify threads per inch on external threads and find the center of your workpiece to line up thread-cutting tools. This identifier has a corrosion-resistant satin-chrome finish that reduces glare.
    For Use With
    For Thread
    Type
    For Thread
    Location
    For Threads
    per In.
    Lg.
    Wd.
    Thk.
    Mfr.
    Mfr. Model
    No.
    Appearance
    Each
    Inch
     
    Chrome-Plated Steel
    Screws, Bolts, Threaded RodsUNC/UNFExternal14, 20, 24, 322 1/4"3/4"3/64"StarrettC391Satin0000000000000
     
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