Knurled Grippers | McMaster-Carr

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

Yes

Export Control Classification Number (ECCN)

EAR99

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102 Products

Knob-Grip Retractable Spring Plungers

With the most versatile handle we offer, these fit in tight spaces while still giving you something to grab. A tug retracts the nose so you can make controlled adjustments. Use these spring plungers for everything from positioning workpieces to changing the height of tables and platforms.

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.

Steel Nose—The strongest, most wear-resistant noses, these won't deform from stress and vibration. Steel is best for dry environments, however, since moisture will cause it to rust.

18-8 Stainless Steel Nose—The choice for wet and outdoor environments, 18-8 stainless steel resists rusting. It's strong enough for most jobs, but won't withstand stress and vibration as well as steel.

316 Stainless Steel Nose—With the best corrosion resistance of all, 316 stainless steel stands up to harsh weather, salt water, and chemicals. The nose is strong enough for most jobs, but won't withstand stress and vibration as well as steel.

Brass Nose—Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments. Since brass is softer than other metals, these noses are less likely to dent surfaces, however, they could deform under high stress.

Acetal Nose—The best plastic for damp and wet environments, acetal won't swell or lose strength if exposed to moisture. These noses are extra soft to avoid scratching delicate surfaces. They are best for use on soft materials, such as aluminum.

Twist-to-Lock—Free up both hands to adjust your workpiece or switch out parts without the plunger springing back and getting in the way. Pull back the handle and twist to lock the nose in its retracted position.

			Nose		Nose Force, lbf		Body		Handle		Nonlocking		Twist-to-Lock
	Thread Size	Thread Lg.	Extended Lg.	Dia.	Extended	Compressed	Material	Lg.	Material	Dia.		Each		Each
Steel Nose



		10-32	0.4"	0.09"	0.104"	0.5	3	Black-Oxide Steel	0.76"	Steel	3/8"	———	0	8497A75	000000


		10-32	0.4"	0.094"	0.104"	0.5	3	Zinc-Plated Steel	0.65"	Steel	3/8"	84915A44	000000	———	0
		10-32	0.41"	0.094"	0.104"	1	3.5	Zinc-Plated Steel	0.69"	Steel	3/8"	———	0	84915A55	00000
		1/4"-20	0.4"	0.125"	0.124"	0.5	2	Zinc-Plated Steel	0.81"	Steel	1/2"	———	0	84915A41	00000
		1/4"-20	0.4"	0.125"	0.124"	1	4	Zinc-Plated Steel	0.81"	Steel	1/2"	———	0	84915A11	00000
		1/4"-20	0.5"	0.125"	0.123"	1	4	Zinc-Plated Steel	0.81"	Steel	1/2"	84915A45	00000	———	0
		5/16"-18	0.6"	0.19"	0.155"	1	5	Black-Oxide Steel	1.1"	Steel	5/8"	———	0	8497A76	00000
		5/16"-18	0.63"	0.187"	0.155"	1.5	6	Zinc-Plated Steel	1.09"	Steel	5/8"	———	0	84915A56	00000
		5/16"-18	0.63"	0.188"	0.154"	1	6	Zinc-Plated Steel	1"	Steel	5/8"	84915A46	00000	———	0
		3/8"-16	0.75"	0.218"	0.185"	1	8	Zinc-Plated Steel	1.25"	Steel	3/4"	84915A47	00000	———	0
		3/8"-16	0.75"	0.22"	0.186"	0.5	3	Zinc-Plated Steel	1.26"	Steel	3/4"	———	0	84915A42	00000


		3/8"-16	0.75"	0.22"	0.186"	1	8	Zinc-Plated Steel	1.26"	Steel	3/4"	———	0	84915A12	00000
		1/2"-13	0.65"	0.25"	0.249"	0.5	4	Zinc-Plated Steel	1.38"	Steel	1"	———	0	84915A43	00000
		1/2"-13	0.65"	0.25"	0.249"	1	10	Zinc-Plated Steel	1.38"	Steel	1"	———	0	84915A13	00000
		1/2"-13	0.88"	0.25"	0.248"	1	10	Zinc-Plated Steel	1.5"	Steel	1"	84915A48	00000	———	0
		5/8"-11	1"	0.312"	0.311"	5	10	Zinc-Plated Steel	1.72"	Steel	1 1/8"	———	0	84915A57	00000
		5/8"-11	1"	0.319"	0.312"	1.5	12	Zinc-Plated Steel	1.75"	Steel	1 1/4"	84915A81	00000	———	0
		3/4"-10	1.13"	0.45"	0.375"	1.5	16	Black-Oxide Steel	2.15"	Steel	1 1/2"	———	0	8497A77	00000
		3/4"-10	1.13"	0.45"	0.375"	1.5	16	Zinc-Plated Steel	2.15"	Steel	1 1/2"	———	0	84915A779	00000
		3/4"-10	1.2"	0.45"	0.375"	1.5	16	Zinc-Plated Steel	2"	Steel	1 1/2"	84915A82	00000	———	0
		M5 x 0.8 mm	9.5 mm	2 mm	2.6 mm	0.5	3	Zinc-Plated Steel	18 mm	Steel	10 mm	———	0	84915A83	00000


		M5 x 0.8 mm	10 mm	2 mm	2.5 mm	0.5	3	Zinc-Plated Steel	16 mm	Steel	9 mm	84915A51	00000	———	0
		M6 x 1 mm	10.1 mm	3 mm	2.9 mm	1	4	Zinc-Plated Steel	20.3 mm	Steel	13 mm	———	0	84915A84	00000
		M6 x 1 mm	13 mm	3 mm	3 mm	1	4	Zinc-Plated Steel	21 mm	Steel	13 mm	84915A52	00000	———	0
		M10 x 1.5 mm	18.7 mm	6 mm	4.7 mm	1	8	Zinc-Plated Steel	33 mm	Steel	19 mm	———	0	84915A85	00000
		M10 x 1.5 mm	19 mm	6 mm	5 mm	1	8	Zinc-Plated Steel	32 mm	Steel	19 mm	84915A53	00000	———	0
		M12 x 1.75 mm	21.6 mm	6 mm	6.3 mm	1	10	Zinc-Plated Steel	39.6 mm	Steel	25 mm	———	0	84915A86	00000
		M12 x 1.75 mm	23 mm	6 mm	6 mm	1	10	Zinc-Plated Steel	39 mm	Steel	25 mm	84915A54	00000	———	0


		18-8 Stainless Steel Nose



				10-32	0.4"	0.094"	0.104"	0.5	3	18-8 Stainless Steel	0.65"	18-8 Stainless Steel	3/8"	84935A36	00000	———	0


				10-32	0.41"	0.094"	0.104"	1	3.5	18-8 Stainless Steel	0.69"	18-8 Stainless Steel	3/8"	———	0	84935A65	00000
				1/4"-20	0.4"	0.125"	0.124"	0.5	2	18-8 Stainless Steel	0.81"	18-8 Stainless Steel	1/2"	———	0	84935A33	00000
				1/4"-20	0.4"	0.125"	0.124"	1	4	18-8 Stainless Steel	0.81"	18-8 Stainless Steel	1/2"	———	0	84935A11	00000
				1/4"-20	0.5"	0.125"	0.123"	1	4	18-8 Stainless Steel	0.81"	18-8 Stainless Steel	1/2"	84935A37	00000	———	0
				5/16"-18	0.63"	0.187"	0.155"	1.5	6	18-8 Stainless Steel	1.09"	18-8 Stainless Steel	5/8"	———	0	84935A66	00000
				5/16"-18	0.63"	0.188"	0.154"	1	6	18-8 Stainless Steel	1"	18-8 Stainless Steel	5/8"	84935A38	00000	———	0
				3/8"-16	0.75"	0.218"	0.185"	1	8	18-8 Stainless Steel	1.25"	18-8 Stainless Steel	3/4"	84935A39	00000	———	0
				3/8"-16	0.75"	0.22"	0.186"	0.5	3	18-8 Stainless Steel	1.26"	18-8 Stainless Steel	3/4"	———	0	84935A34	00000
				3/8"-16	0.75"	0.22"	0.186"	1	8	18-8 Stainless Steel	1.26"	18-8 Stainless Steel	3/4"	———	0	84935A12	00000
				1/2"-13	0.65"	0.25"	0.249"	0.5	4	18-8 Stainless Steel	1.38"	18-8 Stainless Steel	1"	———	0	84935A35	00000


				1/2"-13	0.65"	0.25"	0.249"	1	10	18-8 Stainless Steel	1.38"	18-8 Stainless Steel	1"	———	0	84935A13	00000
				1/2"-13	0.88"	0.25"	0.248"	1	10	18-8 Stainless Steel	1.5"	18-8 Stainless Steel	1"	84935A41	00000	———	0
				5/8"-11	1"	0.312"	0.311"	5	10	18-8 Stainless Steel	1.72"	18-8 Stainless Steel	1 1/8"	———	0	84935A67	00000
				5/8"-11	1"	0.319"	0.312"	1.5	12	18-8 Stainless Steel	1.75"	18-8 Stainless Steel	1 1/4"	84935A91	00000	———	0
				3/4"-10	1.13"	0.45"	0.375"	1.5	16	18-8 Stainless Steel	2.15"	18-8 Stainless Steel	1 1/2"	———	0	84935A51	00000
				M5 x 0.8 mm	9.5 mm	2 mm	2.5 mm	0.5	3	18-8 Stainless Steel	18 mm	18-8 Stainless Steel	10 mm	———	0	84935A53	00000
M5 x 0.8 mm				10 mm	2 mm	2.5 mm	0.5	3	18-8 Stainless Steel	16 mm	18-8 Stainless Steel	9 mm	84935A61	00000	———	0
M6 x 1 mm	13 mm			3 mm	3 mm	1	4	18-8 Stainless Steel	21 mm	18-8 Stainless Steel	13 mm	84935A62	00000	———	0
M10 x 1.5 mm	19 mm			6 mm	5 mm	1	8	18-8 Stainless Steel	32 mm	18-8 Stainless Steel	19 mm	84935A63	00000	———	0
M12 x 1.75 mm	23 mm			6 mm	6 mm	1	10	18-8 Stainless Steel	39 mm	18-8 Stainless Steel	25 mm	84935A64	00000	———	0


316 Stainless Steel Nose



				10-32	0.4"	0.09"	0.104"	0.5	3	316 Stainless Steel	0.65"	316 Stainless Steel	3/8"	8692A11	00000	———	0


				10-32	0.4"	0.09"	0.104"	0.5	3	316 Stainless Steel	0.76"	316 Stainless Steel	3/8"	———	0	8692A21	00000
				1/4"-20	0.4"	0.13"	0.124"	0.1	0.5	316 Stainless Steel	0.84"	316 Stainless Steel	1/2"	———	0	8692A19	00000
				1/4"-20	0.4"	0.13"	0.124"	1	4	316 Stainless Steel	0.84"	316 Stainless Steel	1/2"	———	0	8692A22	00000
				1/4"-20	0.5"	0.13"	0.124"	0.1	0.5	316 Stainless Steel	0.81"	316 Stainless Steel	1/2"	8692A18	00000	———	0
				1/4"-20	0.5"	0.13"	0.124"	1	4	316 Stainless Steel	0.81"	316 Stainless Steel	1/2"	8692A12	00000	———	0
				5/16"-18	0.6"	0.19"	0.155"	1	5	316 Stainless Steel	1.1"	316 Stainless Steel	5/8"	———	0	8692A23	00000
				5/16"-18	0.63"	0.19"	0.155"	1	5	316 Stainless Steel	1.01"	316 Stainless Steel	5/8"	8692A13	00000	———	0
				3/8"-16	0.75"	0.22"	0.186"	1	8	316 Stainless Steel	1.25"	316 Stainless Steel	3/4"	8692A14	00000	———	0
				3/8"-16	0.75"	0.22"	0.186"	1	8	316 Stainless Steel	1.33"	316 Stainless Steel	3/4"	———	0	8692A24	00000
				1/2"-13	0.88"	0.25"	0.249"	1	10	316 Stainless Steel	1.51"	316 Stainless Steel	1"	8692A15	00000	———	0


				1/2"-13	0.89"	0.25"	0.249"	1	10	316 Stainless Steel	1.64"	316 Stainless Steel	1"	———	0	8692A25	00000
				5/8"-11	0.88"	0.38"	0.312"	1.5	12	316 Stainless Steel	1.84"	316 Stainless Steel	1 1/4"	———	0	8692A26	00000
				5/8"-11	1"	0.38"	0.312"	1.5	12	316 Stainless Steel	1.75"	316 Stainless Steel	1 1/4"	8692A16	00000	———	0
				3/4"-10	1.13"	0.45"	0.375"	1.5	16	316 Stainless Steel	2.15"	316 Stainless Steel	1 1/2"	———	0	8692A27	00000
				3/4"-10	1.2"	0.45"	0.375"	1.5	16	316 Stainless Steel	2.01"	316 Stainless Steel	1 1/2"	8692A17	00000	———	0


				Brass Nose



						10-32	0.4"	0.09"	0.104"	0.5	3	Brass	0.65"	Brass	3/8"	8471A24	00000	———	0


						10-32	0.4"	0.09"	0.104"	0.5	3	Brass	0.76"	Brass	3/8"	———	0	8471A15	00000
						1/4"-20	0.4"	0.13"	0.124"	0.1	0.5	Brass	0.84"	Brass	1/2"	———	0	8471A32	00000
		1/4"-20				0.4"	0.13"	0.124"	1	4	Brass	0.84"	Brass	1/2"	———	0	8471A16	00000
		1/4"-20	0.45"			0.13"	0.124"	0.1	0.5	Brass	0.81"	Brass	1/2"	8471A31	00000	———	0
		1/4"-20	0.5"			0.13"	0.124"	1	4	Brass	0.81"	Brass	1/2"	8471A25	00000	———	0
		5/16"-18	0.6"			0.19"	0.155"	1	5	Brass	1.1"	Brass	5/8"	———	0	8471A17	00000
		5/16"-18	0.63"			0.19"	0.155"	1	5	Brass	1.01"	Brass	5/8"	8471A26	00000	———	0
		3/8"-16	0.75"			0.22"	0.186"	1	8	Brass	1.25"	Brass	3/4"	8471A27	00000	———	0
		3/8"-16	0.75"			0.22"	0.186"	1	8	Brass	1.33"	Brass	3/4"	———	0	8471A18	00000
		1/2"-13	0.88"			0.25"	0.249"	1	10	Brass	1.51"	Brass	1"	8471A28	00000	———	0


		1/2"-13	0.89"			0.25"	0.249"	1	10	Brass	1.64"	Brass	1"	———	0	8471A19	00000
		5/8"-11	0.88"			0.38"	0.312"	1.5	12	Brass	1.84"	Brass	1 1/4"	———	0	8471A21	00000
		5/8"-11	1"			0.32"	0.312"	1.5	12	Brass	1.75"	Brass	1 1/4"	8471A22	00000	———	0
		3/4"-10	1"			0.45"	0.375"	1.5	16	Brass	2.01"	Brass	1 1/2"	8471A62	00000	———	0
		3/4"-10	1.13"			0.45"	0.375"	1.5	16	Brass	2.15"	Brass	1 1/2"	———	0	8471A23	00000
		3/4"-10	1.2"			0.45"	0.375"	1.5	16	Brass	2.01"	Brass	1 1/2"	8471A29	00000	———	0


		Acetal Nose



						10-32	0.4"	0.09"	0.104"	0.5	3	18-8 Stainless Steel	0.76"	18-8 Stainless Steel	3/8"	———	0	2369A46	00000


						10-32	0.4"	0.09"	0.104"	0.5	3	Steel	0.76"	Steel	3/8"	———	0	2387A66	00000
						1/4"-20	0.5"	0.125"	0.144"	1	5	18-8 Stainless Steel	0.88"	18-8 Stainless Steel	1/2"	———	0	2369A41	00000
						1/4"-20	0.5"	0.125"	0.144"	1	5	Steel	0.88"	Steel	1/2"	———	0	2387A61	00000
						1/4"-20	0.5"	0.13"	0.124"	1	4	18-8 Stainless Steel	0.81"	18-8 Stainless Steel	1/2"	84935A92	00000	———	0
						1/4"-20	0.5"	0.13"	0.124"	1	4	Steel	0.81"	Steel	1/2"	8497A71	00000	———	0
5/16"-18						0.63"	0.188"	0.179"	1.5	6	18-8 Stainless Steel	1.09"	18-8 Stainless Steel	5/8"	———	0	2369A42	00000
5/16"-18	0.63"					0.188"	0.179"	1.5	6	Steel	1.09"	Steel	5/8"	———	0	2387A62	00000
5/16"-18	0.63"					0.19"	0.155"	1	6	18-8 Stainless Steel	1"	18-8 Stainless Steel	5/8"	84935A93	00000	———	0
5/16"-18	0.63"					0.19"	0.155"	1	6	Steel	1"	Steel	5/8"	8497A72	00000	———	0
3/8"-16	0.75"					0.218"	0.216"	1.5	8	18-8 Stainless Steel	1.28"	18-8 Stainless Steel	3/4"	———	0	2369A43	00000


3/8"-16	0.75"					0.218"	0.216"	1.5	8	Steel	1.28"	Steel	3/4"	———	0	2387A63	00000
3/8"-16	0.75"					0.22"	0.186"	1	8	18-8 Stainless Steel	1.25"	18-8 Stainless Steel	3/4"	84935A917	00000	———	0
3/8"-16	0.75"					0.22"	0.186"	1	8	Steel	1.25"	Steel	3/4"	8497A73	00000	———	0
1/2"-13	0.88"					0.25"	0.249"	1	10	Steel	1.5"	Steel	1"	8497A74	00000	———	0
1/2"-13	0.88"					0.25"	0.31"	2.5	10	18-8 Stainless Steel	1.5"	18-8 Stainless Steel	1"	———	0	2369A44	00000
1/2"-13	0.88"					0.25"	0.31"	2.5	10	Steel	1.5"	Steel	1"	———	0	2387A64	00000
5/8"-11	1"					0.313"	0.373"	5	10	18-8 Stainless Steel	1.72"	18-8 Stainless Steel	1 1/8"	———	0	2369A45	00000
5/8"-11	1"					0.313"	0.373"	5	10	Steel	1.72"	Steel	1 1/8"	———	0	2387A65	00000
5/8"-11	1"					0.319"	0.312"	1.5	12	Steel	1.75"	Steel	1 1/4"	8497A719	00000	———	0
3/4"-10	1.13"					0.45"	0.375"	1.5	16	18-8 Stainless Steel	2.15"	18-8 Stainless Steel	1 1/2"	———	0	2369A47	00000