Pin Number Pin Number |
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Head Type Head Type |
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 | Threaded |
System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Pin Type Pin Type |
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 | Taper |
Material Material |
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Small End Diameter Small End Diameter |
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Shaft Type Shaft Type |
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 | Tapered |
Thread Length Thread Length |
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End Shape End Shape |
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 | Rounded |
Breaking Strength Breaking Strength |
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End Type End Type |
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 | Plain |
Rate of Taper Rate of Taper |
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Minimum Hardness Minimum Hardness |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Passivation Passivation |
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Thread Type Thread Type |
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Hardness Hardness |
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Finish Finish |
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Threaded Taper Pins
Threads on these pins stick out for easy removal from blind holes. Tighten the hex nut to draw the pin out. Often used for positioning components and securing assemblies, they taper at a uniform rate to fit in tapered holes. For a snug fit, use a tapered drill bit that matches the pin number for inch sizes or the small end diameter for metric sizes. They have slightly rounded edges to aid insertion.
Breaking strength is measured as single shear, which is the force required to break the pin into two pieces.
18-8 stainless steel pins offer a balance of strength and corrosion resistance. They may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
| Lg. | Small End Dia. | Rate of Taper | Thread Lg. | Thread Size | Min. Hardness | Breaking Strength, lbs./sq. in. | Pkg. Qty. | Pkg. | |
Pin Number 10—0.706" Large End Dia. | |||||||||
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| 3" | 0.644" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B85 | 46,500 | 1 | 000000000 | 00000 |
| 3 1/2" | 0.633" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B85 | 46,500 | 1 | 000000000 | 0000 |
| 4" | 0.623" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B85 | 46,500 | 1 | 000000000 | 00000 |
| 4 1/2" | 0.612" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B85 | 46,500 | 1 | 000000000 | 00000 |
| 5" | 0.602" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B85 | 46,500 | 1 | 000000000 | 00000 |
| 6" | 0.581" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B85 | 46,500 | 1 | 000000000 | 00000 |
| Lg. | Small End Dia. | Rate of Taper | Thread Lg. | Thread Size | Min. Hardness | Breaking Strength, lbs./sq. in. | Pkg. Qty. | Pkg. | |
Pin Number 10—0.704" Large End Dia. | |||||||||
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| 3" | 0.642" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B90 | 54,000 | 1 | 000000000 | 000000 |
| 3 1/2" | 0.631" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 4" | 0.621" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 4 1/2" | 0.61" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 5" | 0.6" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 6" | 0.579" | 1/4" per 12" | 7/8" | 5/8"-18 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
Threaded Plug Gauges with Calibration Certificate
These gauges come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They allow you to inspect internal threads on parts. All have a go gauge on one end and a no-go gauge on the other end. A taperlock handle lets you quickly replace worn gauges.
Check the minimum internal thread size with the go gauge end, and check the maximum internal thread size with the no-go gauge end. A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.
Threads have different classes of fit. Thread fit designates the tightness or looseness of mating threads. For example, inch threads with a 3B fit have tighter tolerances than threads with a 2B fit.
Threaded Plug Gauges
These have a go gauge on one end and a no-go gauge on the other end. They allow you to inspect internal threads on parts. A taperlock handle lets you quickly replace worn gauges.
Check the minimum internal thread size with the go gauge end, and check the maximum internal thread size with the no-go gauge end. A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.
Threads have different classes of fit. Thread fit designates the tightness or looseness of mating threads. For example, inch threads with a 3B fit have tighter tolerances than threads with a 2B fit.