1 1/4" Pins | McMaster-Carr

The most commonly used clevis pins—just slide a cotter pin into the hole to secure parts. These pins have a flat, low-profile head to fit in tight spaces. They're less likely to get in the way than pins with a loop grip or T-handle but aren’t as easy to grab if you want to remove them frequently. Add your own cotter pin, or choose a clevis pin that includes a reusable hairpin cotter.

Steel

Cotter Pin Not

Included

Carbon Steel—Stronger than stainless steel, these pins won't deform from stress and vibration. They perform best in dry environments since moisture will cause them to rust.

Zinc-Plated Carbon Steel—These pins withstand occasional exposure to moisture. However, since friction from moving parts can wear away the finish, they're not ideal for wet environments. While not nearly as corrosion resistant as stainless steel, they are stronger and won’t deform under stress.

						Head
	Usable Lg.	Dia. Tolerance	For Max. Cotter Pin Dia.	Min. Hardness	Lg.	Dia.	Ht.	Pkg. Qty.		Pkg.
Carbon Steel







				1 1/4" Diameter

				2 3/8"	-0.020" to 0.000"	3/16"	Rockwell B63	3"	1 31/64"	11/32"	1	98306A692	000000


				3 3/8"	-0.020" to 0.000"	3/16"	Rockwell B63	4"	1 1/2"	11/32"	1	98306A851	00000
				4 3/8"	-0.020" to 0.000"	3/16"	Rockwell B63	5"	1 1/2"	11/32"	1	98306A852	00000
				5 3/8"	-0.020" to 0.000"	3/16"	Rockwell B63	6"	1 1/2"	11/32"	1	98306A853	00000


				Zinc-Plated Carbon Steel







								1 1/4" Diameter

								3 3/8"	-0.020" to 0.000"	3/16"	Rockwell B63	4"	1 31/64"	11/32"	1	97245A774	00000


								4 3/8"	-0.020" to 0.000"	3/16"	Rockwell B63	5"	1 31/64"	11/32"	1	97245A775	00000
								5 3/8"	-0.020" to 0.000"	3/16"	Rockwell B63	6"	1 31/64"	11/32"	1	97245A776	00000

Corrosion-Resistant Stainless Steel

Cotter Pin Not

Included

18-8 Stainless Steel—The choice for wet and outdoor environments, these pins resist rusting. They're strong enough to fasten most components but won't withstand stress and vibration as well as steel.

High-Strength 17-4 PH Stainless Steel—The strongest stainless steel pins we offer, these are the least likely to deform due to stress and vibration. Similar to 18-8 stainless steel, they're suitable for most wet and outdoor environments. However, they won't hold up to the harsh conditions and chemicals that 316 stainless steel can.

						Head
	Usable Lg.	Dia. Tolerance	For Max. Cotter Pin Dia.	Min. Hardness	Lg.	Dia.	Ht.	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				1 1/4" Diameter

				2 3/8"	-0.004" to -0.002"	3/16"	Rockwell B80	3"	1 1/2"	11/32"	1	90378A268	000000


				3 3/8"	-0.020" to 0.000"	1/2"	Rockwell B80	4"	1 1/2"	11/32"	1	92390A841	00000
				3 3/8"	-0.004" to -0.002"	3/16"	Rockwell B80	4"	1 1/2"	11/32"	1	90378A269	00000
				4 3/8"	-0.020" to 0.000"	1/2"	Rockwell B80	5"	1 1/2"	11/32"	1	92390A849	00000


				High-Strength 17-4 PH Stainless Steel







								1 1/4" Diameter

								2 3/8"	-0.004" to -0.002"	3/16"	Rockwell C28	3"	1 1/2"	11/32"	1	93392A273	00000


								3 3/8"	-0.004" to -0.002"	3/16"	Rockwell C28	4"	1 1/2"	11/32"	1	93392A274	00000
								4 3/8"	-0.004" to -0.002"	3/16"	Rockwell C28	5"	1 1/2"	11/32"	1	93392A275	00000

Tethered Loop-Grip Clevis Pins

A lanyard or chain prevents your pin from getting lost when removed. With a large loop handle that's easy to grip and pull, these clevis pins are often used for towing and other applications where you regularly secure and release components.

Steel


With Cotter Pin and Lanyard	With Cotter Pin and Lanyard	With Linch Pin and Chain

Painted Carbon Steel—Stronger than stainless steel, these pins won't deform from stress and vibration. The dark enamel creates a finished look but offers minimal corrosion resistance. They're best for dry environments.

Zinc-Yellow-Chromate-Plated Carbon Steel—With a more durable finish than clear zinc plating, these pins hold up in wet and outdoor environments although not as well as stainless steel. Because the plating resists wear and the steel holds up under stress, they're good for pivoting parts, like rod end linkages.

Cotter Pin Included—The hairpin cotter is quicker to install and remove than a linch pin but not as secure.

Linch Pin Included—Less likely to get knocked or shaken out of place than a hairpin, the linch pin has a ring that snaps down and locks.

	Min. Hardness	Head Dia.	Handle Color		Each
Zinc-Plated Carbon Steel with Cotter Pin and Lanyard







	1 1/4" Diameter

	7"	-0.016" to 0.016"	3/16"	Rockwell C19	2"	—	98412A519	000000


	Zinc-Yellow-Chromate-Plated Carbon Steel with Cotter Pin and Lanyard







					1 1/4" Diameter

					7"	-0.016" to 0.016"	3/16"	Rockwell C19	2"	—	98412A247	00000


					Zinc-Yellow-Chromate-Plated Carbon Steel with Linch Pin and Chain







									1 1/4" Diameter

									7"	-0.012" to 0.000"	9/32"	Rockwell C28	1 7/8"	—	98497A675	00000


									Black-Painted Carbon Steel with Cotter Pin and Lanyard







													1 1/4" Diameter

													8 1/2"	-0.003" to 0.002"	17/64"	Rockwell C32	—	Red	91594A360	00000


													12"	-0.003" to 0.002"	11/64"	Rockwell C32	—	Red	91594A670	00000

Corrosion-Resistant Stainless Steel

With Cotter Pin and Lanyard

With Linch Pin and Chain

Cotter Pin Included—The hairpin cotter is quicker to install and remove than a linch pin but not as secure.

Linch Pin Included—Less likely to get knocked or shaken out of place than a hairpin, the linch pin has a ring that snaps down and locks.

	Min. Hardness	Head Dia.		Each
High-Strength 17-4 PH Stainless Steel with Cotter Pin and Lanyard







	1 1/4" Diameter

	7"	-0.016" to 0.016"	3/16"	Rockwell B80	2"	98412A504	000000


	High-Strength 17-4 PH Stainless Steel with Linch Pin and Chain







					1 1/4" Diameter

					7"	-0.016" to 0.016"	17/64"	Rockwell B80	2"	98497A490	00000

Dowel Pins

Precisely align machine parts and prevent movement during assembly. These dowel pins are machined to tight tolerances and have a uniform diameter for a snug fit. They can also be used as a pivot, shaft, or hinge to join moving components. Since dowel pins can be hard to remove, they are best suited for permanent fixtures that don't require frequent adjustments or disassembly.

Steel

High-Strength Alloy Steel—Our strongest, most wear-resistant pins, these won't bend or break from vibration. Use them for high-stress applications, such as mounting and aligning hydraulic cylinders and injection molds. They perform best in dry environments since moisture will cause them to rust.

Material Certificate—Pins include a report with a traceable lot number and a description of their chemical, physical, and mechanical properties.

	Min. Hardness	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
High-Strength Alloy Steel







	1 1/4" Diameter

	1 1/2"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	—	1	98381A950	000000


	2"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	—	1	98381A952	00000
	3"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	—	1	98381A956	00000
	4"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	Material Certificate	1	98381A960	00000
	6"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	—	1	98381A968	00000

Corrosion-Resistant Stainless Steel About Corrosion-Resistant Stainless Steel

High-Strength Machinable 416 Stainless Steel—These pins hold their shape under stress and friction from moving parts. In addition to being the strongest stainless steel alloy, 416 is also the most machinable, so you can shape these pins to fit your hole. However, they are the least corrosion-resistant stainless steel option.

	Min. Hardness	Pkg. Qty.		Pkg.
High-Strength Machinable 416 Stainless Steel







	1 1/4" Diameter

	1 1/2"	0.0001" to 0.0003"	Not Rated	Rockwell C36	1	98380A790	000000


	2"	0.0001" to 0.0003"	Not Rated	Rockwell C36	1	98380A792	00000
	3"	0.0001" to 0.0003"	Not Rated	Rockwell C36	1	98380A794	00000
	4"	0.0001" to 0.0003"	Not Rated	Rockwell C36	1	98380A796	00000
	6"	0.0001" to 0.0003"	Not Rated	Rockwell C36	1	98380A798	00000

T-Handle Clevis Pins

With the widest grip, these pins give you the most leverage. They’re also the easiest to grab with gloved or slippery hands but take up the most space when installed. To secure, slide a cotter pin (not included) into the hole.

Steel

	Min. Hardness	Handle Color		Each
Black-Zinc-Plated Carbon Steel







	1 1/4" Diameter

	7"	-0.003" to 0.001"	1/4"	Rockwell B90	Black	91640A170	000000

Loop-Grip Clevis Pins with Toggle

For components you need to lock in place but also disconnect frequently, these pins have a toggle end and large loop handle. No need for a separate cotter pin, the toggle swivels so you can insert into a hole and then swivels back to secure. Fold down the handle to save space when installed.

Steel

		Each
Zinc-Plated Carbon Steel







	1 1/4" Diameter

	7"	-0.010" to 0"	Rockwell B70	97141A712	000000

Clevis Pins with Locking Retainer

Secure and release these heavy duty pins with one hand. Swing the welded solid steel retainer closed, and it locks onto the pin until you press the lever to open. Unlike other clevis pins, you don’t have to reach around to insert a cotter pin or worry about it falling out. These are often used for towing since they make it easy to hitch and unhitch your equipment.

Steel

Powder-Coated Carbon Steel—A shiny black finish creates a barrier against rust in damp and outdoor environments. While not as corrosion resistant as stainless steel, these pins are stronger and won't deform under stress.

	Retainer Clearance	Min. Hardness	Lg.		Each
Black-Powder-Coated Carbon Steel







	Square-Retainer

	1 1/4"	7"	-0.003" to 0.010"	3 7/8"	Rockwell C32	11"	91533A600	000000

Quarter-Turn Quick-Change Fixture Clamps

Install these clamps into fixture plates, machine subplates, and tombstones to quickly swap components in or out of your machining setup. They lock or unlock with the turn of a knob. Since they locate while they clamp, you can accurately position components with repeatability of ±0.1".

For accurate positioning, use at least two sets of clamps and cam receptacles. Install receptacles into a base plate and clamps into a fixture plate. Line up the two plates, insert the clamps into the receptacles, then turn the knobs to secure your fixture in place. If you need more holding capacity, use additional clamps and receptacles.

Cam Receptacles


Fastener Mount	Thread In

Fastener Mount—Fastener-mount receptacles have three recessed holes on the face so you can secure them to your base plate with the included screws.

Thread In—Thread-in receptacles have a threaded body for installation in a tapped hole. You hold them in place with the included nut, so they’re good for thin base plates.

	For Fixture Plate Thk.
	Min.	Max.	For Clamp Shank Dia., mm	Dia.	Thk.	Thread Size	Material	Mounting Fasteners Included		Each
Fastener Mount



		1/2"	Not Rated	8	1 1/4"	7/16"	—	Nickel-Plated Steel	Yes	9952N124	000000


		Thread In



				1/4"	1/2"	8	1 1/4"	11/16"	M20 × 1.5 mm	Nickel-Plated Steel	—	9952N125	00000

Domed-Head Locating and Support Buttons

Support rounded or irregularly shaped workpieces from the bottom or side with minimal contact. Press the stud into a drilled hole for permanent installation. Also known as rest buttons.

			Stud		Tolerance
	Dia.	Lg.	Dia.	Lg.	Lg.	Stud Dia.		Each
Steel



		1 1/4"	1 1/4"	3/4"	7/8"	-0.002" to 0.002"	-0.0005" to 0"	1371N21	000000

Impact-Resistant Alignment Pins


	Alignment Pins with Tether Hole

Often called bull pins, these pins are designed to resist mushrooming caused by repeated pounding. The large striking surface allows you to drive the pins quickly and efficiently. Use alignment pins to align structural components such as I-beams and angle irons for bolting, riveting, and welding.

Alignment Pins with Tether Hole—For added safety, choose pins with a tether hole while working from heights.

					Body
	Point Dia.	Taper Lg.	Dia.	Overall Lg.	Shape	Texture		Each
Steel







				Alignment Pins

				5/16"	6"	1 1/4"	13"	Round	Smooth	6057A12	000000




						Alignment Pins with Tether Hole

						5/16"	6 5/16"	1 1/4"	13 3/4"	Round	Smooth	6057A14	00000

Screw-Mount Locating and Support Buttons

Flat Head

Also known as rest buttons, these buttons support workpieces and fixtures from the bottom or side. Mount them onto a screw or stud extending from your jig or table.

Round—Round buttons have an unthreaded, counterbored through hole. Mount them to a socket head cap screw.

	Lg.	Lg. Tolerance	For Mounting Screw Size	Mounting Fasteners Included		Each
Steel—Round with Flat Head



	1 1/4"	7/8"	-0.001" to 0.001"	1/2"	No	8506A27	00000


	1 1/4"	1 1/2"	0" to 0.001"	3/8"	No	8506A113	00000
	1 1/4"	2"	0" to 0.001"	3/8"	No	8506A115	00000

Alignment Pins

Line up holes by driving these pins through existing rivet, pin, and bolt holes in multiple pieces of metal. Alternatively known as lineup taper punches.

					Body
	Point Dia.	Taper Lg.	Dia.	Overall Lg.	Shape	Texture		Each
Steel



		7/16"	10 1/2"	1 1/4"	12"	Round	Smooth	6055A5	000000


		7/16"	10 1/2"	1 1/4"	15"	Round	Smooth	6055A8	00000

Tooth-Slotted Spring Pins

End View

The interlocking teeth resist pulling forces that can cause other slotted pins to wiggle out of place. These pins stay in position under vibration and in holes that aren't perfectly round. Compress pins to insert them in a hole. Once installed, they expand slightly and create tension to hold parts in place. Also known as roll pins.

Black-Oxide Spring Steel—These pins won't deform from stress and vibration. The dark, matte coating creates a finished look with minimal corrosion resistance, so they're best for dry environments.

	Double Shear Breaking Strength, lbf	Min. Hardness		Each
Black-Oxide Spring Steel







	1 1/4" Diameter

	4"	1.25" to 1.252"	0.23"	53,500	Rockwell C42	90354A118	000000


	6"	1.25" to 1.252"	0.23"	53,500	Rockwell C42	90354A121	00000

High-Strength Anchors for Block and Brick

Offering up to twice the strength of double expansion anchors, these US-made anchors expand in four directions for a superior grip in floors, walls, and ceilings. You can even use them to mount heavy machinery with constant motion, such as conveyors and vibrating feeders, because their ridges lock them in place to resist vibration. All of these anchors expand along their full length to distribute the gripping force, so they won’t crack soft materials. You can use them in concrete near edges, corners, or other weak points as an alternative to drop-in anchors.

To install, tap the anchor into a drilled hole. Insert a screw or threaded rod through your machinery and into the anchor. Then, tighten to expand the anchor. All create a permanent female-threaded connection that lets you remove and reinstall a screw or threaded rod.

					Ultimate Strength, lbf
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Material	Pull-Out	Shear	Conditions Tested In	Pkg. Qty.		Pkg.
3/4"-10	3 1/8"	1 1/4"	3 1/8"	Zinc	9,600	15,200	3,000 psi Concrete	1	92915A160	000000

Anchors for Block and Brick

Also known as double expansion anchors, these expand from both sides for full contact with your hole’s walls. They’re often used to mount handrails, shelving, and light fixtures. Since the gripping force is distributed along the entire length of the anchor, it won’t crack soft materials like block and brick. You can use these anchors as an alternative to drop-in anchors in concrete near edges, corners, or other weak points, but they are not as strong.

To install, hammer into a drilled hole and position your component. Then, insert a screw or threaded rod and tighten. For maximum expansion, the anchor should protrude slightly above the surface before threading the screw. All create a permanent female-threaded connection that lets you remove and reinstall a screw or threaded rod. They cannot be used in overhead applications.

					Ultimate Strength, lbf
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Material	Pull-Out	Shear	Conditions Tested In	Pkg. Qty.		Pkg.
3/4"-10	3 15/16"	1 1/4"	3 1/2"	Zinc	8,000	13,200	4,000 psi Concrete	1	97031A046	00000

Shallow-Install Anchors for Block and Brick


	Installation Tools

Secure window frames and doors in walls where your drilling depth is limited. These anchors have similar strengths to double expansion anchors but only need about 75% of the installation depth. All have a sleeve that expands inside your hole to create a strong grip. The sleeve, commonly called a caulking sleeve, also creates a seal to block out air and moisture. Since the gripping force is distributed along the entire length of these anchors, they won’t crack soft materials like block and brick. They’re also known as caulk-in anchors.

To install, place the anchor into a drilled hole, cone end first. Insert an installation tool (sold separately) into the anchor to expand the sleeve over the cone. Then, position your component, insert a screw or threaded rod, and tighten. All create a permanent female-threaded connection that lets you remove and reinstall a screw or threaded rod. They cannot be used in overhead applications.

Anchors												Installation Tools
						Ultimate Strength, lbf
Thread Size	Lg.	Drill Bit Size	Min. Installation Dp.	Sleeve Material	Material	Pull-Out	Shear	Conditions Tested In	Pkg. Qty.		Pkg.		Each
3/4"-10	2"	1 1/4"	2 1/2"	Lead	Zinc	5,600	7,600	4,000 psi Concrete	1	97041A719	00000	97020A124	000000