About Threaded Studs and Rods
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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.
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 |
Threaded on One End 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 |
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.