5/16"-24 Pins | McMaster-Carr

Filter by

System of Measurement

Length

Material

Thread Length

Shaft Diameter

Fastener Head Type

Threading

Shaft Length

Thread Spacing

Taper Pin Number

Large End Diameter

Small End Diameter

Shaft Type

Component

Mount Type

Cotter Pin Length

RoHS

Hardness

Drive Style

Spring Plunger Driver

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Pin Type

Taper

Export Control Classification Number (ECCN)

REACH

Thread Direction

DFARS Specialty Metals

52 Products

Single-End Studs

Screw the threaded end of these studs into a tapped hole, and use the unthreaded end as a pivot point, hinge, shaft, or locator pin.

18-8 Stainless Steel—Made from 18-8 stainless steel, these studs are chemical resistant and may be mildly magnetic.

			Shaft
	Lg.	Thread Lg.	Lg.	Dia.	Dia. Tolerance	Tensile Strength, psi	Hardness		Each
18-8 Stainless Steel







				5/16"-24

				1"	1/2"	1/2"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A203	00000


				1 1/2"	3/4"	3/4"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A204	0000
				2"	3/4"	1 1/4"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A205	0000
				2 1/2"	3/4"	1 3/4"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A206	0000
				3"	3/4"	2 1/4"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A207	0000
				3 1/2"	3/4"	2 3/4"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A208	0000
				4"	3/4"	3 1/4"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A209	00000
				4 1/2"	3/4"	3 3/4"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A211	00000
				5"	3/4"	4 1/4"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A212	00000
				6"	3/4"	5 1/4"	5/16"	-0.005" to 0.005"	70,000	Not Rated	97042A214	00000

Threaded Taper Pins

Tighten the

nut to draw

the pin out of

the hole.

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.

Inch

Length for inch pins measures the unthreaded length of the pin.

12L14 Carbon Steel—12L14 Carbon steel pins have good strength.

18-8 Stainless Steel—18-8 stainless steel pins offer a balance of strength and corrosion resistance. They may be mildly magnetic.

Breaking Strength—Breaking strength is measured as single shear, which is the force required to break the pin into two pieces.

	Thread Lg.	Thread Size	Min. Hardness	Breaking Strength, psi	Pkg. Qty.		Pkg.
12L14 Carbon Steel







	6 Taper Pin—0.339" Large End Diameter

	1 1/4"	0.315"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	5	92281A342	000000


	1 1/2"	0.31"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	5	92281A343	00000
	1 3/4"	0.305"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	5	92281A344	00000
	2"	0.299"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	5	92281A345	00000
	2 1/4"	0.294"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	5	92281A346	00000
	2 1/2"	0.289"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	5	92281A347	00000
	3"	0.279"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	5	92281A349	00000
	4"	0.258"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	1	92281A353	0000
	5"	0.237"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	1	92281A357	0000
	6"	0.216"	1:48	3/8"	5/16"-24	Rockwell B85	46,500	1	92281A361	0000


	18-8 Stainless Steel







					6 Taper Pin—0.339" Large End Diameter

					1 1/4"	0.315"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A342	0000


					1 1/2"	0.31"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A343	0000
					1 3/4"	0.305"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A344	0000
					2"	0.299"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A345	0000
					2 1/4"	0.294"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A346	0000
					2 1/2"	0.289"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A347	0000
					3"	0.279"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A349	0000
					4"	0.258"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A353	0000
					5"	0.237"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A357	00000
					6"	0.216"	1:48	3/8"	5/16"-24	Rockwell B90	54,000	1	92284A361	00000

Single-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.

18-8 Stainless Steel—Stud and cotter pin are 18-8 stainless steel, making them chemical resistant and mildly magnetic.

			Shaft			Cotter Pin
	Lg.	Thread Lg.	Lg.	Dia.	Dia. Tolerance	Lg.	Hole Dia.	Tensile Strength	Hardness		Each
18-8 Stainless Steel







				5/16"-24

				2"	1"	1"	5/16"	-0.005" to 0.005"	2"	0.141"	Not Rated	Rockwell B89	93712A100	00000


				3"	2"	1"	5/16"	-0.005" to 0.005"	3"	0.141"	Not Rated	Rockwell B89	93712A200	0000
				4"	3"	1"	5/16"	-0.005" to 0.005"	4"	0.141"	Not Rated	Rockwell B89	93712A300	0000

Steel Cotter-Pin-Locking Hex Head Screws

Partially

Threaded

Secure rotating parts subjected to vibration, such as the wheels on carts and hand trucks. A cotter pin (not included) slides through the hole in the shank of these screws to keep nuts from loosening. They hold stronger than screws with threadlocker and lockwashers, but they aren’t recommended for high-vibration applications because prolonged stress can shear the pin. The head's six flat sides keep wrenches and sockets from slipping and rounding off the drive.

Length is measured from under the head.

Medium-Strength Fastener—Your go-to screws for fastening most machinery and equipment. They have tensile strengths from 90,000 to 120,000 psi.

Cadmium-Plated Steel—The plating reduces friction between the screw and your mounting surface to prevent sticking when you tighten or loosen screws. It also creates a barrier against rust.

		Head
	Lg.	Wd.	Ht.	Hole Dia.	For Cotter Pin Dia.	Threading	Thread Spacing	Tensile Strength, psi	Mil. Spec.	Pkg. Qty.		Pkg.
Medium-Strength Cadmium-Plated Steel







				5/16"-24

				27/32"	1/2"	13/64"	0.076"	1/16"	Partially Threaded	Fine	120,000	AN5-6	5	94622A221	00000


				1 3/32"	1/2"	13/64"	0.076"	1/16"	Partially Threaded	Fine	120,000	AN5-10	5	94622A222	00000
				1 11/32"	1/2"	13/64"	0.076"	1/16"	Partially Threaded	Fine	120,000	AN5-12	5	94622A223	00000
				1 19/32"	1/2"	13/64"	0.076"	1/16"	Partially Threaded	Fine	120,000	AN5-14	5	94622A224	00000
				2 3/32"	1/2"	13/64"	0.076"	1/16"	Partially Threaded	Fine	120,000	AN5-20	5	94622A225	00000

Ball-Nose Spring Plungers

Align, position, and lock moving parts for most machining and assembly tasks. These spring plungers have a spring-loaded ball that compresses when a part presses against it, and then pops out into a notch or groove to hold the part in place. Unlike long-nose spring plungers, the ball rolls easily in and out of position, so they're a great fit for applications that require consistent, smooth movement, such as positioning parts in an assembly line and aligning fixtures and jigs when cutting or drilling.

Spring plungers are available with or without a threadlocker. Those with a threadlocker won't wiggle loose from vibration. Spring plungers without a threadlocker are easier to remove.

440C Stainless Steel Nose—The strongest, most wear-resistant stainless steel noses, these grind against hard metal surfaces without denting or scratching. However, they are not as corrosion resistant as 316 stainless steel.

		Nose		Nose Force, lbf		Body		Drive Style
	Thread Size	Extended Lg.	Dia.	Extended	Compressed	Material	Lg.	Front	Back		Each
440C Stainless Steel Nose



		5/16"-24	0.04"	0.156"	6	17	18-8 Stainless Steel	0.58"	Spring Plunger Driver	Slotted	3408A641	000000


		5/16"-24	0.04"	0.156"	6	17	Steel	0.58"	Spring Plunger Driver	Slotted	3408A541	0000

Go/No-Go Threaded Plug Gauges with Handle

Speed up thread tolerance checks—the handle on these gauges gives you a good grip to quickly thread and unthread go or no-go gauges. Use these gauges to make sure nuts, tapped holes, and other parts fall within tolerance. All are precisely manufactured to confirm thread fit. If the plug gauges wear down, you can insert new ones (not included) onto the taperlock handle.

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.

Go/no-go gauges have both a go gauge on one end of the handle and a no-go gauge on the other to speed up tests. Go gauges check the minimum internal thread size. No-go gauges check the maximum internal thread size.

Class X Gauge

Double-Ended Taperlock

Handle

Calibration Certificate Traceable to NIST—Gauges with a calibration certificate traceable to NIST were calibrated in a lab. The certificate, sometimes called a test report or long-form certificate, details the tested measurements.

For Class 2B Unified Standard Thread Fit—For inch threads, the higher the class number, the tighter the fit. Unified Standard Class 2B is standard and works for most applications.

For Thread Fit—Thread fit designates the tightness or looseness of mating threads.

	Thread Type	Pitch Dia. Tolerance	Hardness	Material	Features	Choose a Thread Fit		Each
Go/No-Go Gauges



	5/16"-24	UNF	-0.0003" to 0.0003"	Rockwell C70	Chrome-Plated Tool Steel	Double-Ended Taperlock Handle	Unified Standard Class 2B, Unified Standard Class 3B	2366A525	000000


	Go/No-Go Gauges with Calibration Certificate Traceable to NIST



			5/16"-24	UNF	-0.0003" to 0.0003"	Rockwell C70	Chrome-Plated Tool Steel	Double-Ended Taperlock Handle	Unified Standard Class 2B, Unified Standard Class 3B	3157A33	000000

Threaded Plug Gauges

Test if internal threads fall within tolerance. These plug gauges are often used in nuts and tapped holes to confirm thread fit. For precision and accuracy, they’re manufactured to tight tolerances.

Threads are within tolerance if it’s easy to thread a go gauge but difficult to thread a no-go gauge more than two turns.

Class X Gauge

Go Gauge—Go gauges check the minimum hole diameter.

No-Go Gauge—No-go gauges check the maximum hole diameter.

Accuracy Certificate Traceable to NIST—Gauges with an accuracy certificate traceable to NIST include verification from the manufacturer that their thread sizes are within tolerance. The certificate is also known as a certificate of compliance or a short-form certification.

For Class 2B Unified Standard Thread Fit—For inch threads, the higher the class number, the tighter the fit. Unified Standard Class 2B is standard and works for most applications.

For Thread Fit—Thread fit designates the tightness or looseness of mating threads.

	Thread Type	Pitch Dia. Tolerance	Hardness	Material	For Thread Fit		Each
Go Gauges



	5/16"-24	UNF	0" to 0.0003"	Rockwell C70	Chrome-Plated Tool Steel	Unified Standard Class 2B, Unified Standard Class 3B	7968N22	000000


	Go Gauges with Accuracy Certificate Traceable to NIST



			5/16"-24	UNF	0" to 0.0003"	Rockwell C70	Chrome-Plated Tool Steel	Unified Standard Class 2B, Unified Standard Class 3B	7968N112	00000


			No-Go Gauges



					5/16"-24	UNF	-0.0003" to 0"	Rockwell C70	Chrome-Plated Tool Steel	Unified Standard Class 2B	7968N58	00000


					5/16"-24	UNF	-0.0003" to 0"	Rockwell C70	Chrome-Plated Tool Steel	Unified Standard Class 3B	7968N59	00000


					No-Go Gauges with Accuracy Certificate Traceable to NIST



							5/16"-24	UNF	-0.0003" to 0"	Rockwell C70	Chrome-Plated Tool Steel	Unified Standard Class 2B	7968N148	00000


							5/16"-24	UNF	-0.0003" to 0"	Rockwell C70	Chrome-Plated Tool Steel	Unified Standard Class 3B	7968N149	00000

Go/No-Go Left-Hand Threaded Plug Gauges with Handle

A go and no-go gauge in one, these gauges check that left-hand threads fall within tolerance. Use them to confirm thread fit for nuts, tapped holes, and other parts. The taperlock handle speeds up tests, giving you a good grip to thread and unthread each gauge end. It also lets you swap out worn gauges for new ones (not included) on either end.

The go gauge checks the minimum internal thread size, and the no-go gauge checks the maximum. A part is within tolerance if it’s easy to thread the go gauge but difficult to thread the no-go gauge more than two turns.

Class X Gauge

Plug Gauges with Accuracy Certificate Traceable to NIST—Gauges with an accuracy certificate traceable to NIST include verification from the manufacturer that their thread sizes are within tolerance. The certificate is also known as a certificate of compliance or a short-form certification.

Plug Gauges with Calibration Certificate Traceable to NIST—Gauges with a calibration certificate traceable to NIST were calibrated in a lab. The certificate, sometimes called a test report or long-form certificate, details the tested measurements.

For Class 2B Unified Standard Thread Fit—For inch threads, the higher the class number, the tighter the fit. Unified Standard Class 2B is standard and works for most applications.

For Thread Fit—Thread fit designates the tightness or looseness of mating threads.

	Thread Type	Pitch Dia. Tolerance	Hardness	Material	Features	Choose a Thread Fit		Each
Plug Gauges with Accuracy Certificate Traceable to NIST



	5/16"-24	UNF	-0.0003" to 0.0003"	Rockwell C70	Chrome-Plated Tool Steel	Double-Ended Taperlock Handle	Unified Standard Class 2B, Unified Standard Class 3B	7935N103	0000000


	Plug Gauges with Calibration Certificate Traceable to NIST



			5/16"-24	UNF	-0.0003" to 0.0003"	Rockwell C70	Chrome-Plated Tool Steel	Double-Ended Taperlock Handle	Unified Standard Class 2B, Unified Standard Class 3B	7938N103	000000

Go/No-Go Helical Insert Threaded Plug Gauges with Handle

Check that holes tapped for helical threads are within tolerance. You’ll sometimes hear these threads referred to as Screw Thread Insert (STI) threads. To speed up tests, these gauges have a go gauge on one end and a no-go gauge on the other. The double-ended taperlock handle makes them quick to thread and unthread. It also lets you swap in new plug gauges (not included) in place of worn ones.

								Plug Gauges with Accuracy Certificate Traceable to NIST		Plug Gauges with Calibration Certificate Traceable to NIST
	Thread Size	Thread Type	Pitch Dia. Tolerance	Hardness	Material	Features	For Thread Fit		Each		Each
Class X Gauge



		5/16"-24	UNF	-0.0003" to 0.0003"	Rockwell C70	Chrome-Plated Tool Steel	Double-Ended Taperlock Handle	Unified Standard Class 2B	7941N21	0000000	7941N38	0000000