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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Length Length |
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Material Material |
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Threading Threading |
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Shaft Diameter Shaft Diameter |
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Pin Number Pin Number |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Pin Type Pin Type |
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 | Taper |
REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Thread Type Thread Type |
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Thread Spacing Thread Spacing |
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Locking Type Locking Type |
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| Without Thread Locker | Thread Locker |
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| Cotter Pin |
Hardness Hardness |
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About Threaded Studs and Rods
More
About Hex Head Screws and Bolts
More
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.
Steel pins have good strength. Pins that meet ASME B18.8.2 specifications conform to ASME standards for material and dimensions.
18-8 stainless steel pins offer a balance of strength and corrosion resistance. They may be mildly magnetic.
Length for inch pins measures the unthreaded length of the pin.
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 9—0.591" Large End Dia. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2" | 0.549" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B85 | 46,500 | 1 | 000000000 | 00000 |
| 2 1/2" | 0.539" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B85 | 46,500 | 1 | 000000000 | 0000 |
| 3" | 0.529" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B85 | 46,500 | 1 | 000000000 | 0000 |
| 3 1/2" | 0.518" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B85 | 46,500 | 1 | 000000000 | 0000 |
| 4" | 0.508" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B85 | 46,500 | 1 | 000000000 | 0000 |
| 4 1/2" | 0.497" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B85 | 46,500 | 1 | 000000000 | 0000 |
| 5" | 0.487" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B85 | 46,500 | 1 | 000000000 | 0000 |
| 6" | 0.466" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B85 | 46,500 | 1 | 000000000 | 0000 |
| Lg. | Small End Dia. | Rate of Taper | Thread Lg. | Thread Size | Min. Hardness | Breaking Strength, lbs./sq. in. | Pkg. Qty. | Pkg. | |
Pin Number 9—0.591" Large End Dia. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2" | 0.549" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B90 | 54,000 | 1 | 000000000 | 000000 |
| 2 1/2" | 0.539" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 3" | 0.529" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 3 1/2" | 0.518" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 4" | 0.508" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 4 1/2" | 0.497" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 5" | 0.487" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
| 6" | 0.466" | 1/4" per 12" | 3/4" | 1/2"-20 | Rockwell B90 | 54,000 | 1 | 000000000 | 00000 |
Slotted Ball-Nose Spring Plungers
Install these spring plungers with a screwdriver—they're slotted on one or both ends. The ball nose rolls to minimize wear and allow parts to move in and out of position.
Steel is strong and wear resistant.
440C stainless steel is hard, wear resistant, and mildly chemical resistant.
18-8 stainless steel is chemical resistant.
Spring plungers without thread locker are for use in soft material such as aluminum, in extreme temperatures, and on parts requiring frequent assembly and removal.
Spring plungers with thread locker have a locking element that adds friction to resist loosening.
Extended nose force is the force required to begin to depress the nose. Compressed nose force is the force required to depress the nose flush with the body. When using a plunger as a detent or stop, a lighter nose force with a shallower hole releases more easily, while a heavier force with a deeper hole holds more securely.
For technical drawings and 3-D models, click on a part number.
Partially Threaded Studs with Cotter Pin
Also known as hood pins, these studs have a cotter pin lodged through a drilled hole in the unthreaded portion for light duty holding, such as securing access panels and locking other fasteners. Stud and cotter pin are 18-8 stainless steel, making them chemical resistant and mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Shaft | Cotter Pin | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Thread Lg. | Lg. | Dia. | Dia. Tolerance | Lg. | Hole Dia. | Tensile Strength | Hardness | Each | |
18-8 Stainless Steel | ||||||||||
1/2"-20 | ||||||||||
| 2" | 1" | 1" | 1/2" | -0.005" to 0.005" | 2" | 0.141" | Not Rated | Rockwell B89 | 000000000 | 00000 |
| 3" | 2" | 1" | 1/2" | -0.005" to 0.005" | 3" | 0.141" | Not Rated | Rockwell B89 | 000000000 | 0000 |
| 4" | 3" | 1" | 1/2" | -0.005" to 0.005" | 4" | 0.141" | Not Rated | Rockwell B89 | 000000000 | 00000 |
T-Bolts
Also known as tank-strap bolts, these T-bolts are commonly used with a band clamp or a strap to hold fuel tanks and other objects in place. The large T-shaped head provides a secure grip for steady tightening. Length is measured from the top of the head.
Match the thread spacing of mating components. Fine threads are closely spaced to prevent loosening from vibration.
Steel T-bolts without a finish are ready to be painted or finished.
Zinc-plated steel T-bolts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Cotter Pin-Lockable Hex Head Screws
Place a cotter pin through the hole in the shank to keep a nut from loosening (pins and nuts sold separately). These screws have a stronger hold than screws with thread lockers or lock washers. Screws are made to stringent Army-Navy specifications that ensure performance and reliability. They have a precisely measured unthreaded portion (grip). For added strength, place this portion in joints subjected to sideways forces. The cadmium plating provides good corrosion resistance to salt water. Screws have fine threads, which are closely spaced to prevent loosening from vibration; they are not compatible with coarse or extra-fine threads. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Thread Lg. | Grip Lg. | Wd. | Ht. | Hole Dia. | For Cotter Pin Dia. | Tensile Strength, psi | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium-Plated Steel | |||||||||||||
1/2"-20 | |||||||||||||
| 1 3/32" | Partially Threaded | Fine | 25/32" | 5/16" | 3/4" | 19/64" | 0.106" | 3/32" | 120,000 | AN8-10 | 1 | 000000000 | 000000 |
| 1 11/32" | Partially Threaded | Fine | 25/32" | 9/16" | 3/4" | 19/64" | 0.106" | 3/32" | 120,000 | AN8-12 | 1 | 000000000 | 0000 |
| 1 19/32" | Partially Threaded | Fine | 25/32" | 13/16" | 3/4" | 19/64" | 0.106" | 3/32" | 120,000 | AN8-14 | 1 | 000000000 | 0000 |
| 1 27/32" | Partially Threaded | Fine | 25/32" | 1 1/16" | 3/4" | 19/64" | 0.106" | 3/32" | 120,000 | AN8-16 | 1 | 000000000 | 0000 |
| 2 3/32" | Partially Threaded | Fine | 25/32" | 1 5/16" | 3/4" | 19/64" | 0.106" | 3/32" | 120,000 | AN8-20 | 1 | 000000000 | 0000 |
| 2 19/32" | Partially Threaded | Fine | 25/32" | 1 13/16" | 3/4" | 19/64" | 0.106" | 3/32" | 120,000 | AN8-24 | 1 | 000000000 | 0000 |
| 3 3/32" | Partially Threaded | Fine | 25/32" | 2 5/16" | 3/4" | 19/64" | 0.106" | 3/32" | 120,000 | AN8-30 | 1 | 000000000 | 0000 |
| 3 19/32" | Partially Threaded | Fine | 25/32" | 2 13/16" | 3/4" | 19/64" | 0.106" | 3/32" | 120,000 | AN8-34 | 1 | 000000000 | 00000 |
| 4 3/32" | Partially Threaded | Fine | 25/32" | 3 5/16" | 3/4" | 19/64" | 0.106" | 3/32" | 120,000 | AN8-40 | 1 | 000000000 | 00000 |
Threaded Locating Pins
Screw the shank into a threaded hole for quick installation and removal. Mate these pins with holes in workpieces for precise alignment.
Diamond-head pins make less contact with the inside of a hole than round-head pins to reduce sticking and jamming.
For technical drawings and 3-D models, click on a part number.
Head | Thread | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Dia. (A) | Ht. (B) | Size | Lg. | Shoulder Ht. | O'all Ht. | Head Dia. Tolerance | Hardness | Each | |
Round Head | |||||||||
Steel | |||||||||
| 1/2" | 11/16" | 1/2"-20 | 11/16" | 5/32" | 2 1/8" | -0.0015" to -0.001" | Rockwell C60-C64 | 0000000 | 000000 |
| 9/16" | 11/16" | 1/2"-20 | 21/32" | 5/32" | 2 1/8" | -0.0015" to -0.001" | Rockwell C60-C64 | 0000000 | 00000 |
Diamond Head | |||||||||
Steel | |||||||||
| 1/2" | 11/16" | 1/2"-20 | 11/16" | 5/32" | 2 1/8" | -0.0015" to -0.001" | Rockwell C60-C64 | 0000000 | 00000 |
| 9/16" | 11/16" | 1/2"-20 | 21/32" | 5/32" | 2 1/8" | -0.0015" to -0.001" | Rockwell C60-C64 | 0000000 | 00000 |
Threaded Locating and Support Buttons
Use these buttons to support and position workpieces and fixtures from the bottom or side. Their hex shape lets you screw them into a threaded hole with a wrench or socket. Threading makes these buttons easier to replace than press-fit, so they are a good choice for high-wear applications. They’re also known as rest buttons.
For technical drawings and 3-D models, click on a part number.
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.
For technical drawings and 3-D models, click on a part number.
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.
For technical drawings and 3-D models, click on a part number.