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Thread Pitch
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Export Control Classification Number (ECCN)
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Threads per Inch and Thread Pitch Size Checkers
 |  |
Inspect fasteners and verify threads with this checker. It includes three wires for each of the pitch diameters. Select the wire that best fits the threads; then calculate the pitch diameter with the equations provided.
Wire | Container | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Use With | For Thread Type | For Thread Location | For Threads per In. | For Thread Pitch, mm | For Acme Threads per In. | No. of Wires | Lg. | Material | Type | Material | Each | |||
Inch/Metric | ||||||||||||||
| Screws, Bolts, Threaded Rods, Pipe | NPT, UNC, UNF, Metric, Acme | External | 3, 3 1/2, 4, 4 1/2, 5, 5 1/2, 6, 7, 7 1/2, 8, 9, 10, 11, 11 1/2, 12, 13, 14, 16, 18, 20, 24, 27, 28, 32, 36, 40, 44, 48 | 0.5, 0.6, 0.7, 0.75, 0.8, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6 | 3, 4, 5, 6, 8, 10, 12, 14, 16 | 48 | 2 3/4" | Stainless Steel | Pouch | Vinyl Plastic | 2082A1 | 000000 | ||
Screw, Bolt, and Nut Size Identifiers
 |  |  |
Inch | Inch/Metric | Metric |
For Use With | For Thread Type | For Thread Location | For Screw Size | For Thread Pitch, mm | For Nut Size | Wd. | Ht. | Thk. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Inch | ||||||||||||
Plastic | ||||||||||||
| Screws, Bolts, Threaded Rods, Nuts | — | External/Internal | No. 8, No. 10, 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 3/4" | — | No. 8, No. 10, 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8" | 7 1/2" | 2 3/8" | 1/64" | 98845A650 | 00000 | ||
Inch/Metric | ||||||||||||
Plastic | ||||||||||||
| Screws, Bolts, Threaded Rods, Nuts | — | External/Internal | No. 6, No. 8, No. 10, 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 3/4", 1", M6, M7, M8, M10, M12, M14, M16, M18, M20, M22 | — | No. 8, No. 10, 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8" | 9" | 3 3/4" | 1/64" | 98845A670 | 0000 | ||
Metric | ||||||||||||
Plastic | ||||||||||||
| Screws, Bolts, Threaded Rods, Nuts | Metric | External/Internal | M6, M7, M8, M10, M12, M14, M16 | 1, 1.25, 1.5, 1.75, 2 | M10, M11, M13, M17, M19, M22, M24 | 5 1/4" | 3 3/16" | 1/64" | 98845A660 | 0000 | ||
Wall-Mount Thread-It Screw, Bolt, and Nut Size Identifiers
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Mount to a wall for easy access, and thread your fastener into holes or onto plugs for quick and accurate size identification.
Mounting Holes | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Use With | For Thread Type | For Thread Location | For Thread Size | Wd. | Ht. | Thk. | No. of | Hole Dia. | Fasteners Included | Each | |||
Inch/Metric | |||||||||||||
Steel | |||||||||||||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF/Metric | External/Internal | 6-32, 8-32, 10-24, 10-32, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 9/16"-12, 9/16"-18, M4 × 0.7 mm, M5 × 0.8 mm, M6 × 1 mm, M7 × 1 mm, M8 × 1 mm, M8 × 1.25 mm, M10 × 1 mm, M10 × 1.25 mm, M10 × 1.5 mm, M12 × 1.25 mm, M12 × 1.5 mm, M12 × 1.75 mm | 3" | 39" | 1/2" | 3 | 5/16" | No | 20375A27 | 000000 | ||
Thread-It Screw, Bolt, and Nut Size Identifiers
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Thread your fastener into holes or onto plugs for quick and accurate size identification.
For Use With | For Thread Type | For Thread Location | For Thread Size | Each | |||
|---|---|---|---|---|---|---|---|
Inch | |||||||
Steel | |||||||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 6-32, 6-40, 8-32, 10-24, 10-32, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 3/4"-10, 3/4"-16, 1"-8, 1"-12 | 20375A14 | 000000 | ||
Inch/Metric | |||||||
Steel | |||||||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF/Metric | External/Internal | 6-32, 8-32, 10-24, 10-32, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, M4 × 0.7 mm, M5 × 0.8 mm, M6 × 1 mm, M7 × 1 mm, M8 × 1 mm, M8 × 1.25 mm, M10 × 1 mm, M10 × 1.25 mm, M10 × 1.5 mm, M12 × 1.25 mm, M12 × 1.5 mm, M12 × 1.75 mm | 20375A21 | 00000 | ||
Metric | |||||||
Steel | |||||||
| Screws, Bolts, Threaded Rods, Nuts | Metric | External/Internal | M3 × 0.5 mm, M4 × 0.7 mm, M5 × 0.8 mm, M6 × 1 mm, M7 × 1 mm, M8 × 1 mm, M8 × 1.25 mm, M10 × 1 mm, M10 × 1.25 mm, M10 × 1.5 mm, M12 × 1.25 mm, M12 × 1.5 mm, M12 × 1.75 mm, M14 × 1.5 mm, M14 × 2 mm, M16 × 1.5 mm, M16 × 2 mm, M20 × 1.5 mm, M20 × 2.5 mm, M24 × 2 mm, M24 × 3 mm | 20375A17 | 00000 | ||
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, Nuts | BSW | External/Internal | 3 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 | — | 30 | 2" | 1/2" | Starrett | 476 | 2071A119 | 000000 | ||
| Screws, Bolts, Threaded Rods | BSW | External/Internal | 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, 34, 36, 40, 48, 60 | — | 28 | 2 3/4" | 3/4" | Mitutoyo | 188-102 | 2071A4 | 00000 | ||
| Screws, Bolts, Threaded Rods | BSW | External/Internal | 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, 48, 60, 62 | — | 28 | 2 3/4" | 1/2" | — | — | 2071A19 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 2 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 | — | 27 | 3 1/2" | 7/8" | Starrett | 155 | 2071A114 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 3 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 | — | 28 | 2 1/2" | 5/8" | Starrett | 484 | 2071A115 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 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, 38, 40, 42 | — | 30 | 2 5/8" | 5/8" | Starrett | 6 | 2071A116 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 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, 38, 40, 42 | — | 30 | 2 3/4" | 1/2" | — | — | 2071A25 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 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, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84 | — | 51 | 2 1/4" | 2 1/4" | — | — | 2071A24 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 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, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84 | — | 51 | 3 3/8" | 3/4" | Starrett | 472 | 2071A118 | 000000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 4, 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 | — | 28 | 2 1/2" | 5/8" | Starrett | 474 | 2071A117 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 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, 48, 50, 56, 60 | — | 30 | 2 3/4" | 1/2" | — | — | 2071A3 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF | External/Internal | 9, 10, 11, 11 1/2, 12, 13, 14, 15, 16, 18, 20, 22, 24, 26, 27, 28, 30, 32, 34, 36, 38, 40 | — | 22 | 2 3/4" | 1/2" | — | — | 2071A1 | 00000 | ||
Stainless Steel | |||||||||||||
| Screws, Bolts, Threaded Rods, Nuts | Acme | External/Internal | 1, 1 1/3, 1 1/2, 1 3/4, 2, 2 1/2, 3, 3 1/2, 4, 5, 6, 7, 8, 9, 10, 12 | — | 16 | 4 3/4" | 1" | — | — | 2071A69 | 000000 | ||
Inch/Metric | |||||||||||||
Steel | |||||||||||||
| Screws, Bolts, Threaded Rods, Nuts | BSW/Metric | External/Internal | 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, 48, 60, 62 | 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.6, 0.7, 0.75, 0.8, 0.9, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6 | 52 | 2 3/4" | 1/2" | — | — | 2071A111 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | BSW/Metric | External/Internal | 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, 48, 60, 62 | 0.4, 0.5, 0.6, 0.7, 0.75, 0.8, 0.9, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7 | 50 | 2 3/4" | 1/2" | — | — | 2071A112 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF/Metric | External/Internal | 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, 28, 29, 30, 32, 34, 36, 38, 40, 42 | 0.4, 0.5, 0.7, 0.75, 0.8, 0.9, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7 | 51 | 2 3/4" | 1/2" | — | — | 2071A68 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | UNC/UNF/Metric | External/Internal | 4, 6, 8, 10, 11, 11 1/2, 12, 13, 16, 20, 28, 32, 40, 56 | 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6 | 28 | 2 3/4" | 1/2" | — | — | 2071A26 | 00000 | ||
Metric | |||||||||||||
Steel | |||||||||||||
| Screws, Bolts, Threaded Rods, Nuts | Metric | 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, 2.5 | 28 | 2 1/2" | 1/2" | Starrett | 156M | 2071A65 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | Metric | 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, 2.5 | 28 | 2 3/4" | 1/2" | — | — | 2071A67 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | Metric | External/Internal | — | 0.4, 0.5, 0.6, 0.7, 0.75, 0.8, 0.9, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7 | 22 | 2 3/4" | 1/2" | — | — | 2071A18 | 00000 | ||
| Screws, Bolts, Threaded Rods, Nuts | Metric | 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, 11.5 | 27 | 3 1/2" | 5/8" | Starrett | 159M | 2071A121 | 00000 | ||
Stainless Steel | |||||||||||||
| Screws, Bolts, Threaded Rods, Nuts | Metric Trapezoidal | External/Internal | — | 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 16, 20 | 12 | 4 3/4" | 3/4" | — | — | 2071A113 | 00000 | ||
Thread Identifier Sets
 |
Set includes calipers and gauges to identify external and internal threads.
Container | |||||||||
|---|---|---|---|---|---|---|---|---|---|
For Use With | For Thread Type | For Thread Location | Type | Material | Includes | Each | |||
Inch/Metric | |||||||||
Steel | |||||||||
| Screws, Bolts, Threaded Rods, Nuts, Pipe | NPT, UNC, UNF, BSPT, BSPP, Metric | External/Internal | Folding Case | Plastic | Caliper, Instruction Book, Two Steel Angle Gauges, Two Steel Gauges | 7863K1 | 000000 | ||
Screw Size Identifiers
 |  |
Inch | Metric |
Find thread size, screw size, diameter, or drill bit size.
For Use With | For Thread Type | For Thread Location | For Thread Size | For Screw Size | For Dia. | For Drill Bit Size | Wd. | Ht. | Thk. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Inch | |||||||||||||
Steel | |||||||||||||
| Screws, Bolts, Threaded Rods, Pins, Rivets, Drill Bits | UNC/UNF | External | 1-64, 1-72, 2-56, 2-64, 3-48, 3-56, 4-36, 4-40, 4-48, 5-40, 5-44, 6-32, 6-36, 6-40, 8-32, 8-36, 8-40, 10-24, 10-32, 12-24, 12-28, 12-32, 1/4"-20, 1/4"-28, 1/4"-32, 5/16"-18, 5/16"-24, 5/16"-32 | No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16" | 0.073", 0.086", 3/32", 0.112", 1/8", 0.138", 5/32", 0.164", 3/16", 7/32", 1/4", 9/32", 5/16" | 7/32", 1/4", 9/32", 5/16", 53 Ga., 51 Ga., 50 Ga., 48 Ga., 47 Ga., 45 Ga., 43 Ga., 42 Ga., 39 Ga., 38 Ga., 37 Ga., 36 Ga., 35 Ga., 33 Ga., 30 Ga., 29 Ga., 28 Ga., 25 Ga., 23 Ga., 21 Ga., 19 Ga., 16 Ga., 14 Ga., 13 Ga., 10 Ga., 8 Ga., 3 Ga., F, I | 3" | 5 1/8" | 5/64" | 98728A112 | 000000 | ||
Metric | |||||||||||||
Steel | |||||||||||||
| Screws, Bolts, Threaded Rods | Metric | External | M8 × 0.75 mm, M8 × 1 mm, M8 × 1.25 mm, M9 × 0.75 mm, M9 × 1 mm, M9 × 1.25 mm, M10 × 0.75 mm, M10 × 1 mm, M10 × 1.25 mm, M10 × 1.5 mm, M11 × 0.75 mm, M11 × 1 mm, M11 × 1.5 mm, M12 × 1 mm, M12 × 1.25 mm, M12 × 1.5 mm, M12 × 1.75 mm, M14 × 1.25 mm, M14 × 1.5 mm, M14 × 2 mm | M8, M9, M10, M11, M12, M14 | — | — | 5 1/8" | 5 3/8" | 1/8" | 98728A116 | 00000 | ||
| Screws, Bolts, Threaded Rods, Drill Bits | Metric | External | M2 × 0.25 mm, M2 × 0.4 mm, M2.2 × 0.25 mm, M2.2 × 0.45 mm, M2.5 × 0.35 mm, M2.5 × 0.45 mm, M3 × 0.35 mm, M3 × 0.5 mm, M3.5 × 0.35 mm, M3.5 × 0.6 mm, M4 × 0.5 mm, M4 × 0.7 mm, M4.5 × 0.5 mm, M4.5 × 0.75 mm, M5 × 0.5 mm, M5 × 0.8 mm, M5.5 × 0.5 mm, M6 × 0.75 mm, M6 × 1 mm, M7 × 0.75 mm, M7 × 1 mm | M2, M2.2, M2.5, M3, M3.5, M4, M4.5, M5, M5.5, M6, M7 | — | 7/32", 52 Ga., 50 Ga., 48 Ga., 46 Ga., 45 Ga., 43 Ga., 39 Ga., 37 Ga., 32 Ga., 31 Ga., 30 Ga., 28 Ga., 25 Ga., 22 Ga., 21 Ga., 18 Ga., 16 Ga., 10 Ga., 8 Ga., 4 Ga., B, D, J | 3" | 5 3/8" | 3/32" | 98728A114 | 00000 | ||
All-in-One Identifiers
 |
Find tube, pipe, fastener, wire, and drill bit sizes with one tool.
For Use With | For Screw Size | For Drill Bit Size | For Pipe Size | For Pipe Fitting Size | Wd. | Ht. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|
Plastic | ||||||||||
| Screws, Bolts, Threaded Rods, Drill Bits, Nails, Nuts, Tube Fittings, Pipe, Pipe Fittings, Tubing, Wire | No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8", 7/16", 1/2", M3, M4, M5, M6, M8, M10, M12 | 1/32", 3/64", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2", 65 Ga., 60 Ga., 55 Ga., 50 Ga., 45 Ga., 40 Ga., 35 Ga., 30 Ga., 25 Ga., 20 Ga., 15 Ga., 10 Ga., 5 Ga., A, F, K, P, U, Z | 1/16, 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 3 1/2, 4, 5, 6 | 1/16, 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | 10 1/2" | 3 1/2" | 20165A34 | 00000 | ||
| Screws, Bolts, Threaded Rods, Drill Bits, Nails, Nuts, Tube Fittings, Pipe, Pipe Fittings, Tubing, Wire | No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8", 7/16", 1/2", M3, M4, M5, M6, M8, M10, M12 | 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8" | 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | 1/8, 1/4, 3/8, 1/2, 3/4, 1 | 8 11/16" | 4 1/4" | 20165A33 | 0000 | ||
Pipe Thread and Thread Pitch Identifiers
 |
In addition to checking NPT and BSPT pipe sizes, use the two included gauges for measuring thread pitch.
For Use With | For Thread Type | For Pipe Size | For Gender | Wd. | Ht. | Thk. | Thread Size Identifier Material | Thread Pitch Identifier Material | Color | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe | BSPT, NPT | 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | Female, Male | 9" | 4 1/4" | 1/4" | Plastic | Steel | Blue | 5887T1 | 00000 | ||
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 Rods | UNC/UNF | External | 14, 20, 24, 32 | 2 1/4" | 3/4" | 3/64" | Starrett | C391 | Satin | 2072A11 | 000000 | ||
Pipe, Tubing, and Hose Size Identifiers
 |  |
For Pipe, Tubing, And Hose | For Pipe, Pipe Fittings, And Hose |
For Use With | For Pipe Size | For Pipe Fitting Size | For Tube OD | For Hose ID | Includes | Wd. | Ht. | Thk. | Color | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Inch | |||||||||||||
Plastic | |||||||||||||
| Pipe, Hose, Tubing | 1/8, 1/4, 3/8, 1/2, 3/4 | — | 1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 5/8", 3/4", 1" | 1/4", 3/8", 1/2", 3/4", 1" | Compression Fitting Chart | 9" | 3 3/4" | 7/64" | Blue | 1976A22 | 00000 | ||
Stainless Steel | |||||||||||||
| Pipe, Pipe Fittings, Hose | 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | — | 1/8", 1/4", 5/16", 3/8", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4" | — | 3 3/4" | 4 1/2" | 1/32" | Silver | 20195A34 | 00000 | ||
Acme Thread Identifiers
 |
Identify Acme threads and use as a guide while grinding and cutting Acme threads to a 29° included angle.
For Use With | For Thread Type | For Thread Location | For Acme Threads per In. | Wd. | Ht. | Thk. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|
Inch | ||||||||||
Steel | ||||||||||
| Screws, Bolts, Threaded Rods | Acme | External | 1, 1 1/3, 1 1/2, 1 3/4, 2, 2 1/2, 3, 4, 5, 6, 7, 8, 9, 10 | 3 3/8" | 1 5/8" | 7/64" | 8615A69 | 000000 | ||
Grease Fitting Size Identifiers
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Take the guesswork out of determining the thread type and size of a grease fitting. Screw the shank of a grease fitting into the labeled holes of these identifiers until you find the one that fits.
For Use With | For Thread Type | For Thread Location | For Thread Size | For Screw Size | For Pipe Size | Wd. | Ht. | Thk. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Inch/Metric | ||||||||||||
Aluminum | ||||||||||||
| Grease Fittings | NPT, SAE-LT, BSW, UNF, BSPT, BSF, Metric | External | 3/16"-32, 1/4"-20, 1/4"-26, 1/4"-28, 5/16"-18, 5/16"-22, 5/16"-24, 3/8"-20, 3/8"-24, 1/2"-12, M6 × 0.75 mm, M6 × 1 mm, M8 × 1 mm, M8 × 1.25 mm, M10 × 1 mm, M10 × 1.5 mm | 1/8", 1/4" | 1/8, 1/4, 3/8 | 8 1/2" | 3" | 1/4" | 6672N11 | 000000 | ||
Pipe Thread Identifiers
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For Use With | For Thread Type | For Thread Location | For Pipe Size | Wd. | Ht. | Thk. | Color | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
Aluminum | |||||||||||
| Pipe | NPT | External | 1/16, 1/8, 1/4, 3/8, 1/2 | 2" | 3" | 1/4" | Blue | 1980A1 | 000000 | ||
Thread Gauges for Lug Nuts
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For Thread Location | For Thread Size | Each | |||
|---|---|---|---|---|---|
Aluminum | |||||
| External/Internal | 7/16"-20 1/2"-20 9/16"-18 M12 × 1.25 mm M12 × 1.5 mm M12 × 1.75 mm M14 × 1.25 mm M14 × 1.5 mm M14 × 2 mm M16 × 1.5 mm | 4991T966 | 000000 | ||
