Acetal-Head Screws | McMaster-Carr

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245 Products

Grip Style

Knurled Head

The texture increases friction so your fingers won't slip when tightening

173 products

Two Arm

Evenly-spaced, flat arms for more force when tightening and loosening

27 products

Grip Style

Six Arm

The largest head of any thumb screw we offer

45 products

Performance

High Visibility

Choose from bright colors so screws are easy to see

123 products

Plastic-Knurled-Head Thumb Screws

Combine the strength of stainless steel with a lightweight head that won't rust. These thumb screws are an economical alternative to fully metal thumb screws. The knurled texture of the head creates extra grip as you twist.

Length is measured from under the head.

18-8 Stainless Steel with Acetal Head—With a stainless steel body and an acetal head, these screws resist moisture and are chemical resistant.

		Head
	Lg.	Dia.	Ht.	Temp. Range, ° F	Threading	Tensile Strength	Choose a Head Color	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Acetal Head







				4-40

				1/4"	5/16"	11/64"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A233	000000


				3/8"	5/16"	11/64"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A237	00000
				1/2"	5/16"	11/64"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A241	00000
				5/8"	5/16"	11/64"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A245	00000
				3/4"	5/16"	11/64"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A249	00000
				1"	5/16"	11/64"	32 to 180	Partially Threaded	Not Rated	Black, Red	25	91185A253	00000




						6-32

						1/4"	3/8"	3/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A257	00000


						3/8"	3/8"	3/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A261	00000
						1/2"	3/8"	3/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A265	00000
						5/8"	3/8"	3/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A269	00000
						3/4"	3/8"	3/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A273	00000
						7/8"	3/8"	3/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A277	00000
						1"	3/8"	3/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A281	00000




								8-32

								1/4"	1/2"	7/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A285	00000


								3/8"	1/2"	7/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A289	00000
								1/2"	1/2"	7/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A293	00000
								5/8"	1/2"	7/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A297	00000
								3/4"	1/2"	7/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A301	00000
								7/8"	1/2"	7/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A305	00000
								1"	1/2"	7/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A309	00000




										10-24

										3/8"	5/8"	1/4"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A342	00000


										1/2"	5/8"	1/4"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A346	00000
										5/8"	5/8"	1/4"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A350	00000
										3/4"	5/8"	1/4"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A354	00000
										7/8"	5/8"	1/4"	32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A358	0000
										1"	5/8"	1/4"	32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A362	0000




	10-32

	3/8"										5/8"	1/4"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A366	00000


	1/2"	5/8"									1/4"	32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A370	00000
	5/8"	5/8"	1/4"								32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A374	00000
	3/4"	5/8"	1/4"								32 to 180	Fully Threaded	Not Rated	Black, Red	25	91185A378	00000
	7/8"	5/8"	1/4"								32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A382	0000
	1"	5/8"	1/4"								32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A386	0000
	1 1/2"	5/8"	1/4"								32 to 180	Partially Threaded	Not Rated	Black, Red	10	91185A390	0000




			1/4"-20

			3/8"								3/4"	5/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A394	0000


			1/2"	3/4"							5/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A398	0000
			5/8"	3/4"	5/16"						32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A402	0000
			3/4"	3/4"	5/16"						32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A406	0000
			7/8"	3/4"	5/16"						32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A410	0000
			1"	3/4"	5/16"						32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A414	0000
			1 1/4"	3/4"	5/16"						32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A418	0000
			1 1/2"	3/4"	5/16"						32 to 180	Partially Threaded	Not Rated	Black, Red	10	91185A422	00000
			1 3/4"	3/4"	5/16"						32 to 180	Partially Threaded	Not Rated	Black, Red	10	91185A426	00000
			2"	3/4"	5/16"						32 to 180	Partially Threaded	Not Rated	Black, Red	5	91185A430	0000




					1/4"-28

					3/8"						3/4"	5/16"	32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A455	0000


					1/2"	3/4"	5/16"				32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A459	0000
					5/8"	3/4"	5/16"				32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A463	0000
					3/4"	3/4"	5/16"				32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A467	0000
					7/8"	3/4"	5/16"				32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A471	00000
					1"	3/4"	5/16"				32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A475	00000
					1 1/4"	3/4"	5/16"				32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A479	00000




							5/16"-18

							1/2"				1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A483	00000


							5/8"	1"	13/32"		32 to 180	Fully Threaded	Not Rated	Black, Red	10	91185A487	00000
							3/4"	1"	13/32"		32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A491	0000
							7/8"	1"	13/32"		32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A495	0000
							1"	1"	13/32"		32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A499	0000
							1 1/4"	1"	13/32"		32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A503	00000
							1 1/2"	1"	13/32"		32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A507	0000




5/16"-24

1/2"									1"		13/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A511	0000


5/8"									1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A515	00000
3/4"									1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A519	0000
7/8"									1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A523	0000
1"									1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A527	0000
1 1/4"									1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A531	00000
1 1/2"									1"	13/32"	32 to 180	Fully Threaded	Not Rated	Black, Red	5	91185A535	0000




	M3 × 0.5 mm

	6 mm	9.6 mm								4.4 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A551	0000


	8 mm	9.6 mm								4.4 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A552	0000
	10 mm	9.6 mm								4.4 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A553	0000
	12 mm	9.6 mm								4.4 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A554	0000
	16 mm	9.6 mm								4.4 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A555	0000
	20 mm	9.6 mm								4.4 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A556	0000




										M4 × 0.7 mm

										6 mm	13 mm	5.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A557	0000


			8 mm							13 mm	5.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A558	0000
			10 mm	13 mm						5.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A559	0000
			12 mm	13 mm						5.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A561	0000
			16 mm	13 mm						5.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A562	0000
			20 mm	13 mm						5.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A563	0000




										M5 × 0.8 mm

										8 mm	16 mm	6.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A564	0000


										10 mm	16 mm	6.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A565	0000
					12 mm					16 mm	6.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A566	0000
					16 mm	16 mm				6.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A567	0000
					20 mm	16 mm				6.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A568	0000
					25 mm	16 mm				6.5 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A569	0000




										M6 × 1 mm

										10 mm	19 mm	7.6 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A571	0000


										10 mm	26 mm	7.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Red	10	96016A572	00000
										12 mm	19 mm	7.6 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A573	0000
							12 mm			26 mm	7.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Red	10	96016A574	00000
							16 mm	19 mm		7.6 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A575	0000
							16 mm	26 mm		7.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red	10	96016A576	0000
							20 mm	19 mm		7.6 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A577	0000
							20 mm	26 mm		7.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red	10	96016A578	0000
							25 mm	19 mm		7.6 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A579	0000
							25 mm	26 mm		7.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	10	96016A581	0000




										M8 × 1.25 mm

12 mm										26 mm	9.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red	5	96016A582	0000


16 mm									26 mm	9.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	5	96016A583	0000
20 mm									26 mm	9.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red, Yellow	5	96016A584	0000
25 mm									26 mm	9.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Yellow	5	96016A585	0000
30 mm									26 mm	9.8 mm	32 to 180	Fully Threaded	Not Rated	Black, Gray, Red	5	96016A586	00000

Six-Arm Plastic-Head Thumb Screws

These thumb screws have the largest head of any we offer. They're often found on stops, plates, and jigs. The six arms leave extra space to fit your fingers for easy twisting. These thumb screws combine the strength of stainless steel with a lightweight plastic head that won't rust.

Length is measured from under the head.

18-8 Stainless Steel with Acetal Head—With a stainless steel body and an acetal head, these screws resist moisture and are chemical resistant.

		Head
	Lg.	Dia.	Ht.	Temp. Range, ° F	Color	Threading	Tensile Strength	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Acetal Head







				1/4"-20

				3/8"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A801	000000


				1/2"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A803	00000
				5/8"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A805	00000
				3/4"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A807	00000
				7/8"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A809	00000
				1"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A811	00000
				1 1/4"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A813	00000
				1 1/2"	1 1/2"	15/32"	32 to 180	Black	Partially Threaded	Not Rated	10	91185A815	00000
				1 3/4"	1 1/2"	15/32"	32 to 180	Black	Partially Threaded	Not Rated	5	91185A817	0000
				2"	1 1/2"	15/32"	32 to 180	Black	Partially Threaded	Not Rated	5	91185A819	0000




						1/4"-28

						3/8"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A821	00000


						1/2"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A823	00000
						5/8"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A825	00000
						3/4"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A827	00000
						7/8"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A829	00000
						1"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A831	00000
						1 1/4"	1 1/2"	15/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A833	00000




								5/16"-18

								1/2"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A835	00000


								5/8"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A837	0000
								3/4"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A839	0000
								7/8"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A841	0000
								1"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A843	0000
								1 1/4"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A845	0000
								1 1/2"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A847	0000




										5/16"-24

										1/2"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A849	0000


										5/8"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A851	0000
										3/4"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A853	00000
										7/8"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A855	0000
										1"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A857	0000
1 1/4"										1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A859	0000
1 1/2"	1 1/2"									13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A861	0000




		3/8"-16

		3/4"	1 1/2"							15/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A863	0000


		7/8"	1 1/2"							15/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A865	0000
		1"	1 1/2"							15/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A867	0000
		1 1/4"	1 1/2"							15/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A869	00000
		1 1/2"	1 1/2"							15/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A871	00000




										M6 × 1 mm

										10 mm	38 mm	12.2 mm	32 to 180	Black	Fully Threaded	Not Rated	10	96016A501	00000


				12 mm						38 mm	12.2 mm	32 to 180	Black	Fully Threaded	Not Rated	10	96016A505	00000
				16 mm	38 mm					12.2 mm	32 to 180	Black	Fully Threaded	Not Rated	10	96016A509	00000
				20 mm	38 mm					12.2 mm	32 to 180	Black	Fully Threaded	Not Rated	10	96016A513	00000
				25 mm	38 mm					12.2 mm	32 to 180	Black	Fully Threaded	Not Rated	10	96016A517	00000




										M8 × 1.25 mm

										12 mm	38 mm	10 mm	32 to 180	Black	Fully Threaded	Not Rated	5	96016A602	0000


										16 mm	38 mm	10 mm	32 to 180	Black	Fully Threaded	Not Rated	5	96016A606	0000
										20 mm	38 mm	10 mm	32 to 180	Black	Fully Threaded	Not Rated	5	96016A610	0000
						25 mm				38 mm	10 mm	32 to 180	Black	Fully Threaded	Not Rated	5	96016A614	0000

Hex-Drive Plastic-Head Thumb Screws

Twist these thumb screws with a hex key when you need more torque than fingers can provide. You can also use a hex key to unfasten them in cramped spaces such as small control boxes. When fastening these thumb screws by hand, the knurled texture of the head creates extra grip as you twist. These thumb screws combine the strength of stainless steel with a lightweight plastic head that won't rust.

Length is measured from under the head.

18-8 Stainless Steel with Acetal Head—With a stainless steel body and an acetal head, these screws resist moisture and are chemical resistant.

		Head
	Lg.	Dia.	Ht.	Temp. Range, ° F	Color	Threading	Tensile Strength	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Acetal Head







				4-40

				9/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	25	98704A105	000000


				13/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	25	98704A110	00000
				17/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	25	98704A115	00000
				21/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A120	0000
				25/32"	5/16"	11/64"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A125	0000
				29/32"	5/16"	11/64"	32 to 180	Black	Partially Threaded	Not Rated	10	98704A130	0000




						6-32

						9/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A200	0000


						13/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A205	0000
						17/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A210	0000
						21/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A215	0000
						25/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A220	0000
						29/32"	3/8"	3/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A225	0000




								8-32

								9/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A310	0000


								13/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A315	0000
								17/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A320	0000
								21/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A325	0000
								25/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A330	0000
								29/32"	1/2"	7/32"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A335	0000




										10-24

										3/8"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A415	0000


										1/2"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A420	0000
										5/8"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A425	0000
										3/4"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A430	0000
										7/8"	5/8"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A435	0000
										1 1/8"	5/8"	1/4"	32 to 180	Black	Partially Threaded	Not Rated	10	98704A440	0000




												10-32

3/8"	5/8"											1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A520	0000


1/2"	5/8"											1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A525	0000
5/8"	5/8"	1/4"										32 to 180	Black	Fully Threaded	Not Rated	10	98704A530	0000
3/4"	5/8"	1/4"	32 to 180									Black	Fully Threaded	Not Rated	10	98704A535	0000
7/8"	5/8"	1/4"	32 to 180									Black	Fully Threaded	Not Rated	10	98704A540	0000
1 1/8"	5/8"	1/4"	32 to 180									Black	Partially Threaded	Not Rated	10	98704A545	0000




		1/4"-20

		3/8"	3/4"									5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A605	0000


		1/2"	3/4"									5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A610	0000
		5/8"	3/4"									5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A615	0000
		3/4"	3/4"	5/16"								32 to 180	Black	Fully Threaded	Not Rated	10	98704A620	0000
		7/8"	3/4"	5/16"	32 to 180							Black	Fully Threaded	Not Rated	10	98704A625	00000
		1 1/8"	3/4"	5/16"	32 to 180							Black	Fully Threaded	Not Rated	10	98704A630	00000
		1 3/8"	3/4"	5/16"	32 to 180							Black	Partially Threaded	Not Rated	10	98704A635	00000




				1/4"-28

				3/8"	3/4"							5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A705	00000


				1/2"	3/4"							5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A710	00000
				5/8"	3/4"							5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	98704A715	00000
				3/4"	3/4"	5/16"						32 to 180	Black	Fully Threaded	Not Rated	10	98704A720	00000
				7/8"	3/4"	5/16"	32 to 180					Black	Fully Threaded	Not Rated	10	98704A725	00000
				1 1/8"	3/4"	5/16"	32 to 180					Black	Fully Threaded	Not Rated	10	98704A730	00000
				1 3/8"	3/4"	5/16"	32 to 180					Black	Partially Threaded	Not Rated	10	98704A735	00000




						5/16"-18

						1/2"	1"					13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	98704A800	0000


						5/8"	1"					13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	98704A805	0000
						3/4"	1"					13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	98704A810	0000
						7/8"	1"	13/32"				32 to 180	Black	Fully Threaded	Not Rated	5	98704A815	0000
						1 1/8"	1"	13/32"	32 to 180			Black	Fully Threaded	Not Rated	5	98704A820	0000
						1 3/8"	1"	13/32"	32 to 180			Black	Fully Threaded	Not Rated	5	98704A825	0000




								5/16"-24

								1/2"	1"			13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	98704A900	0000


								5/8"	1"			13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	98704A905	0000
								3/4"	1"			13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	98704A910	0000
								7/8"	1"			13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	98704A915	0000
								1 1/8"	1"	13/32"		32 to 180	Black	Fully Threaded	Not Rated	5	98704A920	0000
								1 3/8"	1"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	98704A925	0000

Two-Arm Plastic-Head Thumb Screws

The flat, evenly spaced arms give your fingers extra leverage. These thumb screws combine the strength of stainless steel with a lightweight, plastic head that won’t corrode.

Length is measured from under the head.

18-8 Stainless Steel with Acetal Head—With a stainless steel body and an acetal head, these screws resist moisture and are chemical resistant.

		Head
	Lg.	Wd.	Ht.	Temp. Range, ° F	Color	Threading	Tensile Strength	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Acetal Head







				10-24

				1/2"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	25	91185A891	000000


				5/8"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	25	91185A893	00000
				3/4"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	25	91185A895	00000
				1"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A899	0000




						10-32

						3/8"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	25	91185A901	00000


						1/2"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	25	91185A903	00000
						5/8"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	25	91185A905	00000
						3/4"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	25	91185A907	00000
						7/8"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A909	0000
						1"	1"	1/4"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A911	0000
						1 1/2"	1"	1/4"	32 to 180	Black	Partially Threaded	Not Rated	10	91185A913	0000




								1/4"-20

								3/8"	1 1/4"	5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A915	0000


								1/2"	1 1/4"	5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A917	0000
								5/8"	1 1/4"	5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A919	0000
								3/4"	1 1/4"	5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A921	0000
								7/8"	1 1/4"	5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A923	0000
								1"	1 1/4"	5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A925	0000
								1 1/4"	1 1/4"	5/16"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A927	0000
								1 1/2"	1 1/4"	5/16"	32 to 180	Black	Partially Threaded	Not Rated	10	91185A929	0000
								2"	1 1/4"	5/16"	32 to 180	Black	Partially Threaded	Not Rated	5	91185A933	0000




										5/16"-18

										1/2"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A955	0000


										5/8"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	10	91185A957	00000
										3/4"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A959	0000
										7/8"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A961	0000
										1"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A963	0000
										1 1/4"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A965	0000
										1 1/2"	1 1/2"	13/32"	32 to 180	Black	Fully Threaded	Not Rated	5	91185A967	0000

Precision-Adjust Ball-Tip Thumb Screws

Make precise adjustments where tight tolerances are critical. With ultra-fine threads, these thumb screws are often found on measuring devices and photonic equipment. The rolling ball tip maintains contact and swivels 360° so you can make adjustments without loosening the screw. The narrow width of the head allows these thumb screws to fit in spaces with limited clearance. The knurled texture creates extra grip as you twist. These thumb screws combine the strength of stainless steel with a lightweight plastic head that won’t rust.

Length is measured from under the head.

18-8 Stainless Steel with Acetal Head—With a stainless steel body and an acetal head, these screws resist moisture and are chemical resistant.

		Head
	Lg.	Dia.	Ht.	Color	Tip Dia.	Threading	Tensile Strength, psi		Each
18-8 Stainless Steel with Acetal Head







				3/16"-100

				3/4"	3/8"	7/16"	Black	1/8"	Fully Threaded	60,000	97424A110	000000


				1"	3/8"	7/16"	Black	1/8"	Fully Threaded	60,000	97424A140	00000
				1 1/4"	3/8"	7/16"	Black	1/8"	Fully Threaded	60,000	97424A170	00000
				1 1/2"	3/8"	7/16"	Black	1/8"	Fully Threaded	60,000	97424A200	00000
				1 3/4"	3/8"	7/16"	Black	1/8"	Fully Threaded	60,000	97424A230	00000




						1/4"-80

						3/4"	1/2"	3/4"	Black	3/16"	Fully Threaded	60,000	97424A560	00000


						1"	1/2"	3/4"	Black	3/16"	Fully Threaded	60,000	97424A590	0000
						1 1/4"	1/2"	3/4"	Black	3/16"	Fully Threaded	60,000	97424A620	0000
						1 1/2"	1/2"	3/4"	Black	3/16"	Fully Threaded	60,000	97424A650	0000
						2"	1/2"	3/4"	Black	3/16"	Fully Threaded	60,000	97424A680	00000
						3"	1/2"	3/4"	Black	3/16"	Fully Threaded	60,000	97424A740	00000
						3 1/2"	1/2"	3/4"	Black	3/16"	Fully Threaded	60,000	97424A770	00000

Threaded Inserts

Install in unthreaded holes to create a secure mounting point for your precision-adjust thumb screws.

		Flange
	Installed Lg.	Dia.	Thk.	For Max. Hole Dia.	Drill Bit Size		Each
Brass







				3/16"-100

				0.313"	0.29"	0.01"	0.250"	1/4"	98625A320	00000


				0.438"	0.29"	0.01"	0.250"	1/4"	98625A330	0000
				0.625"	0.29"	0.01"	0.250"	1/4"	98625A340	0000
				0.750"	0.29"	0.01"	0.250"	1/4"	98625A350	0000




						1/4"-80

						0.313"	0.352"	0.01"	0.313"	5/16"	98625A950	0000


						0.438"	0.352"	0.01"	0.313"	5/16"	98625A960	0000
						0.625"	0.352"	0.01"	0.313"	5/16"	98625A970	0000
						0.750"	0.352"	0.01"	0.313"	5/16"	98625A980	0000