Expanding-Diameter Pins | McMaster-Carr

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17-4 PH Stainless Steel

6061 Aluminum

Double Shear Breaking Strength

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9 Products

Expanding-Diameter Quick-Release Pins

With a shaft that expands to fill the hole completely, these pins withstand severe vibration and resist pulling. They’re often used to align fixtures during machining as well as open and close molds. Even with repeated insertion and removal, the shaft won’t wear the inside of holes like a retaining ball can. Flip the handle 180° to expand; flip back to contract the shaft and release.

Corrosion-Resistant Stainless Steel

Image of Attribute. Front orientation. Contains Annotated. Quick-Release Pins. Expanding-Diameter Quick-Release Pins.

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. They resist rust in wet and outdoor environments but won't hold up to the harsh chemicals and acids that 316 stainless steel can.

	Handle Color	Handle Material		Each
High-Strength 17-4 PH Stainless Steel







	1/4" Diameter

	1"	8,000	Not Rated	Black	Aluminum	000000000	0000000


	2"	8,000	Not Rated	Black	Aluminum	000000000	000000




			5/16" Diameter

			2"	12,500	Not Rated	Black	Aluminum	000000000	000000




					3/8" Diameter

					1"	18,000	Not Rated	Black	Aluminum	000000000	000000


					2"	18,000	Not Rated	Black	Aluminum	000000000	000000
					3"	18,000	Not Rated	Black	Aluminum	000000000	000000




							1/2" Diameter

							1"	32,000	Not Rated	Black	Aluminum	000000000	000000


							2"	32,000	Not Rated	Black	Aluminum	000000000	000000
							3"	32,000	Not Rated	Black	Aluminum	000000000	000000