Type S Thumb Screws | McMaster-Carr

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97 Products

Stainless Steel Flanged Spade-Head Thumb Screws

These corrosion-resistant thumb screws have a built-in flange that distributes pressure in thin and soft materials—no washer needed. It also provides extra surface area under the screw head to hold down material. The head of these thumb screws is slim and flat like a coin for extra leverage when twisting.

Length is measured from under the flange.

18-8 Stainless Steel—The choice for wet and outdoor environments, these screws resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

		Head
	Lg.	Wd.	Ht.	Flange Dia.	Threading	Tensile Strength	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				6-32

				3/8"	5/16"	11/32"	0.245"	Fully Threaded	Not Rated	10	000000000	000000


				1/2"	5/16"	11/32"	0.245"	Fully Threaded	Not Rated	10	000000000	00000




						8-32

						3/8"	23/64"	25/64"	0.281"	Fully Threaded	Not Rated	10	000000000	00000


						1/2"	23/64"	25/64"	0.281"	Fully Threaded	Not Rated	10	000000000	00000
						3/4"	23/64"	25/64"	0.281"	Fully Threaded	Not Rated	5	000000000	0000
						1"	23/64"	25/64"	0.281"	Fully Threaded	Not Rated	5	000000000	00000




								10-24

								3/8"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	10	000000000	00000


								1/2"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	5	000000000	00000
								3/4"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	5	000000000	00000
								1"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	5	000000000	00000
								1 1/2"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	5	000000000	00000




										10-32

										3/8"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	10	000000000	00000


										1/2"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	5	000000000	0000
										3/4"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	5	000000000	00000
										1"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	5	000000000	00000
										1 1/2"	7/16"	15/32"	0.343"	Fully Threaded	Not Rated	5	000000000	00000




												1/4"-20

												1/2"	33/64"	19/32"	0.435"	Fully Threaded	Not Rated	5	000000000	0000


												5/8"	33/64"	19/32"	0.435"	Fully Threaded	Not Rated	5	000000000	00000
												3/4"	33/64"	19/32"	0.435"	Fully Threaded	Not Rated	5	000000000	00000
												1"	33/64"	19/32"	0.435"	Fully Threaded	Not Rated	5	000000000	00000
												1 1/4"	33/64"	19/32"	0.435"	Fully Threaded	Not Rated	5	000000000	00000
1 1/2"												33/64"	19/32"	0.435"	Fully Threaded	Not Rated	5	000000000	00000
2"	33/64"											19/32"	0.435"	Fully Threaded	Not Rated	1	000000000	0000
2 1/2"	33/64"											19/32"	0.435"	Fully Threaded	Not Rated	1	000000000	0000




		5/16"-18

		3/4"	11/16"									3/4"	0.563"	Fully Threaded	Not Rated	1	000000000	0000


		1"	11/16"									3/4"	0.563"	Fully Threaded	Not Rated	1	000000000	0000
		1 1/2"	11/16"									3/4"	0.563"	Fully Threaded	Not Rated	1	000000000	0000




				3/8"-16

				1"	13/16"							15/16"	0.69"	Fully Threaded	Not Rated	1	000000000	0000


				1 1/2"	13/16"							15/16"	0.69"	Fully Threaded	Not Rated	1	000000000	0000
				2"	13/16"							15/16"	0.69"	Fully Threaded	Not Rated	1	000000000	0000

Steel Flanged Spade-Head Thumb Screws

A built-in flange distributes pressure in thin and soft materials—no washer needed. It also provides extra surface area under the head to hold down material. The head of these thumb screws is slim and flat like a coin for extra leverage when twisting.

Length is measured from under the flange.

Steel—An economical choice that's strong, but rusts in moisture. They're best for dry environments.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

		Head
	Lg.	Wd.	Ht.	Flange Dia.	Threading	Tensile Strength, psi	Pkg. Qty.		Pkg.
Steel







				6-32

				1/4"	5/16"	11/32"	0.250"	Fully Threaded	40,000	25	000000000	000000


				3/8"	5/16"	11/32"	0.250"	Fully Threaded	40,000	25	000000000	00000
				1/2"	5/16"	11/32"	0.250"	Fully Threaded	40,000	25	000000000	00000
				3/4"	5/16"	11/32"	0.250"	Fully Threaded	40,000	25	000000000	00000
				1"	5/16"	11/32"	0.250"	Fully Threaded	40,000	25	000000000	00000




						8-32

						3/8"	23/64"	25/64"	0.281"	Fully Threaded	40,000	25	000000000	0000


						1/2"	23/64"	25/64"	0.281"	Fully Threaded	40,000	25	000000000	0000




								10-24

								3/8"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000


								1/2"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000
								3/4"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000
								1"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000
								1 1/2"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000
								2"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000




										10-32

										3/8"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000


										1/2"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000
										3/4"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000
										1"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000
										1 1/2"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000
										2"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000




												1/4"-20

												1/2"	33/64"	19/32"	0.438"	Fully Threaded	40,000	25	000000000	00000


												3/4"	33/64"	19/32"	0.438"	Fully Threaded	40,000	25	000000000	00000
1"												33/64"	19/32"	0.438"	Fully Threaded	40,000	25	000000000	00000
1 1/4"	33/64"											19/32"	0.438"	Fully Threaded	40,000	25	000000000	00000
1 1/2"	33/64"											19/32"	0.438"	Fully Threaded	40,000	25	000000000	00000
2"	33/64"											19/32"	0.438"	Fully Threaded	40,000	25	000000000	00000
2 1/2"	33/64"											19/32"	0.438"	Fully Threaded	40,000	10	000000000	0000




		5/16"-18

		1/2"	11/16"									3/4"	0.563"	Fully Threaded	40,000	25	000000000	00000


		3/4"	11/16"									3/4"	0.563"	Fully Threaded	40,000	10	000000000	00000
		1"	11/16"									3/4"	0.563"	Fully Threaded	40,000	10	000000000	0000
		1 1/2"	11/16"									3/4"	0.563"	Fully Threaded	40,000	10	000000000	0000
		2"	11/16"									3/4"	0.563"	Fully Threaded	40,000	10	000000000	0000
		2 1/2"	11/16"									3/4"	0.563"	Fully Threaded	40,000	10	000000000	00000




				3/8"-16

				3/4"	13/16"							15/16"	0.688"	Fully Threaded	40,000	10	000000000	00000


				1"	13/16"							15/16"	0.688"	Fully Threaded	40,000	10	000000000	00000
				1 1/4"	13/16"							15/16"	0.688"	Fully Threaded	40,000	10	000000000	00000
				1 1/2"	13/16"	15/16"						0.688"	Fully Threaded	40,000	10	000000000	00000
				2"	13/16"	15/16"	0.688"					Fully Threaded	40,000	10	000000000	00000
				2 1/2"	13/16"	15/16"	0.688"					Fully Threaded	40,000	10	000000000	00000
				3"	13/16"	15/16"	0.688"					Fully Threaded	40,000	10	000000000	00000


				Zinc-Plated Steel







												6-32

								1/4"	5/16"			11/32"	0.250"	Fully Threaded	40,000	10	000000000	00000


								3/8"	5/16"			11/32"	0.250"	Fully Threaded	40,000	10	000000000	0000




												8-32

												3/8"	23/64"	25/64"	0.281"	Fully Threaded	40,000	25	000000000	0000


										1/2"		23/64"	25/64"	0.281"	Fully Threaded	40,000	25	000000000	0000




												10-24

												1/2"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	0000


												3/4"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	0000
												1"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	0000




												10-32

												3/8"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	0000


												1/2"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	0000
												3/4"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	0000
												1"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	0000
												1 1/2"	7/16"	15/32"	0.344"	Fully Threaded	40,000	25	000000000	00000




												1/4"-20

												1/2"	33/64"	19/32"	0.438"	Fully Threaded	40,000	25	000000000	00000


												3/4"	33/64"	19/32"	0.438"	Fully Threaded	40,000	25	000000000	00000
												1"	33/64"	19/32"	0.438"	Fully Threaded	40,000	25	000000000	00000
												1 1/4"	33/64"	19/32"	0.438"	Fully Threaded	40,000	10	000000000	0000
												1 1/2"	33/64"	19/32"	0.438"	Fully Threaded	40,000	10	000000000	0000
												2"	33/64"	19/32"	0.438"	Fully Threaded	40,000	10	000000000	0000
												2 1/2"	33/64"	19/32"	0.438"	Fully Threaded	40,000	10	000000000	0000




												5/16"-18

												1/2"	11/16"	3/4"	0.563"	Fully Threaded	40,000	10	000000000	0000


						3/4"	11/16"					3/4"	0.563"	Fully Threaded	40,000	10	000000000	0000
						1"	11/16"					3/4"	0.563"	Fully Threaded	40,000	10	000000000	0000
						1 1/2"	11/16"					3/4"	0.563"	Fully Threaded	40,000	10	000000000	0000
						2"	11/16"					3/4"	0.563"	Fully Threaded	40,000	10	000000000	0000




								3/8"-16

								3/4"	13/16"			15/16"	0.688"	Fully Threaded	40,000	10	000000000	0000


								1"	13/16"			15/16"	0.688"	Fully Threaded	40,000	10	000000000	0000
								1 1/2"	13/16"			15/16"	0.688"	Fully Threaded	40,000	10	000000000	00000
								2"	13/16"			15/16"	0.688"	Fully Threaded	40,000	10	000000000	00000