Push-On Retaining Caps | McMaster-Carr

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56 Products

Retaining Caps


400 Series Stainless Steel	1050 Spring Steel

Plastic

Use these caps to hold components in place and protect shaft ends. Install these caps with a hammer or push them into place by hand.

Corrosion-Resistant Coated—Corrosion-resistant-coated finish is more corrosion resistant in wet environments than zinc-plated finish. Also known as black luster.

Nickel Plated—Nickel-plated finish has excellent corrosion resistance and a decorative appearance.

Zinc Plated—Zinc-plated finish is corrosion resistant in wet environments.

	For OD	OD	Ht.	Insert Material	Min. Hardness	Temp. Range, ° F	Pkg. Qty.		Pkg.
Black Corrosion-Resistant-Coated 1050 Spring Steel



		1/4"	9/16"	7/32"	Steel	Not Rated	—	5	000000000	00000


		5/16"	5/8"	1/4"	Steel	Not Rated	—	5	000000000	0000
		3/8"	3/4"	9/32"	Steel	Not Rated	—	5	000000000	00000
		1/2"	15/16"	21/64"	Steel	Not Rated	—	5	000000000	00000


		Nickel-Plated 1050 Spring Steel



				1/4"	1/2"	7/32"	Steel	Rockwell C13	—	25	000000000	0000


				3/8"	3/4"	9/32"	Steel	Rockwell C13	—	25	000000000	0000


				Zinc-Plated 1050 Spring Steel



						5/16"	9/16"	19/64"	Steel	Rockwell C44	—	25	000000000	0000


						1/2"	15/16"	21/64"	Steel	Rockwell C38	—	10	000000000	0000
						5/8"	1 3/16"	27/64"	Steel	Rockwell C38	—	10	000000000	0000


						400 Series Stainless Steel



								1/8"	27/64"	1/8"	18-8 Stainless Steel	Rockwell C49	—	10	000000000	0000


								3/16"	1/2"	5/32"	18-8 Stainless Steel	Rockwell C49	—	25	000000000	0000
								1/4"	41/64"	13/64"	18-8 Stainless Steel	Rockwell C49	—	10	000000000	0000
								3/8"	25/32"	15/64"	18-8 Stainless Steel	Rockwell C49	—	10	000000000	00000


								Black Plastic



										5/32"	21/32"	23/64"	Steel	Rockwell C45	-90 to 150	50	000000000	00000


										3/16"	21/32"	23/64"	Steel	Rockwell C45	-90 to 150	50	000000000	00000
										1/4"	27/32"	23/64"	Steel	Rockwell C45	-90 to 150	50	000000000	00000
										5/16"	27/32"	29/64"	Steel	Rockwell C45	-90 to 150	25	000000000	00000
										3/8"	55/64"	15/32"	Steel	Rockwell C45	-90 to 150	25	000000000	0000
										7/16"	53/64"	7/16"	Steel	Rockwell C45	-90 to 150	10	000000000	0000
										1/2"	1 5/16"	41/64"	Steel	Rockwell C45	-90 to 150	10	000000000	0000
										5/8"	1 5/16"	41/64"	Steel	Rockwell C45	-90 to 150	10	000000000	0000


										White Plastic



1/8"												21/32"	23/64"	Steel	Rockwell C45	-90 to 150	10	000000000	00000


3/16"	21/32"											11/32"	Steel	Rockwell C45	-90 to 150	25	000000000	0000
3/8"	55/64"											15/32"	Steel	Rockwell C45	-90 to 150	25	000000000	0000


Red Plastic



												5/16"	55/64"	15/32"	Steel	Rockwell C45	-90 to 150	25	000000000	0000

Flanged Push Nuts for Unthreaded Shafts

The wide flange provides better load distribution than standard push nuts and can be used to cover oversized holes. Also known as thread cutting nuts. Use them on unhardened shafts that are softer than the push nut. The nut bites into the metal to form an interference grip.

	Hex Wd.	Ht.	Flange Dia.	Min. Hardness	Pkg. Qty.		Pkg.
Zinc-Plated 1050 Spring Steel



	1/8"	5/16"	3/16"	7/16"	Rockwell C41	100	000000000	00000


	1/8"	5/16"	13/64"	17/32"	Rockwell C41	100	000000000	00000
	5/32"	3/8"	13/64"	9/16"	Rockwell C41	100	000000000	00000
	3/16"	3/8"	7/32"	1/2"	Rockwell C41	100	000000000	0000
	3/16"	3/8"	15/64"	5/8"	Rockwell C41	100	000000000	00000
	1/4"	7/16"	15/64"	19/32"	Rockwell C41	100	000000000	00000
	1/4"	7/16"	15/64"	11/16"	Rockwell C41	100	000000000	00000
	5/16"	1/2"	5/16"	7/8"	Rockwell C41	50	000000000	00000

Quick-Release Pin Retaining Caps

Press a retaining cap onto the end of a pin to hold it in a hole that's oversized or out of round. They're made of 18-8 stainless steel for a balance of strength and corrosion resistance.

Quick-Release Pin Retaining Caps

Passivated—Caps that are passivated offer added protection against corrosion and oxidation.

For Pin Dia.	Cap OD	Overall Lg.	Usable Lg. Reduction	Material	Passivation	Each
3/16"	3/8"	9/16"	1/8"	18-8 Stainless Steel	Passivated	000000
1/4"	3/8"	9/16"	1/8"	18-8 Stainless Steel	Unpassivated	00000
5/16"	1/2"	5/8"	1/8"	18-8 Stainless Steel	Unpassivated	00000
3/8"	9/16"	3/4"	3/16"	18-8 Stainless Steel	Unpassivated	00000
1/2"	3/4"	1"	1/4"	18-8 Stainless Steel	Unpassivated	00000
5/8"	1"	1 1/4"	1/4"	18-8 Stainless Steel	Passivated	00000
6 mm	9.5 mm	14.7 mm	3 mm	18-8 Stainless Steel	Passivated	00000
8 mm	12.7 mm	15.9 mm	3 mm	18-8 Stainless Steel	Passivated	00000
10 mm	14.3 mm	18.5 mm	5 mm	18-8 Stainless Steel	Passivated	00000
12 mm	19.1 mm	25.4 mm	6 mm	18-8 Stainless Steel	Passivated	00000
16 mm	25.4 mm	31.8 mm	6 mm	18-8 Stainless Steel	Passivated	00000

Quick-Release Pin Retaining Caps with Screw

Caps with screw included provide a convenient attachment point for a lanyard (sold separately).

Passivated—Caps that are passivated offer added protection against corrosion and oxidation.

For Pin Dia.	Cap OD	Overall Lg.	Usable Lg. Reduction	Material	Passivation	Each
3/16"	3/8"	9/16"	1/8"	18-8 Stainless Steel	Passivated	000000
1/4"	3/8"	9/16"	1/8"	18-8 Stainless Steel	Passivated	00000
5/16"	1/2"	5/8"	1/8"	18-8 Stainless Steel	Passivated	00000
3/8"	9/16"	3/4"	3/16"	18-8 Stainless Steel	Passivated	00000
1/2"	3/4"	1"	1/4"	18-8 Stainless Steel	Passivated	00000
5/8"	1"	1 1/4"	1/4"	18-8 Stainless Steel	Passivated	00000

Lanyards

		Each
6" Lg. Lanyard for 3/8" to 3/4" OD Caps	000000000	00000
12" Lg. Lanyard for 3/8" to 3/4" OD Caps	000000000	0000
18" Lg. Lanyard for 3/8" to 3/4" OD Caps	000000000	0000
12" Lg. Lanyard for 1" OD Caps	000000000	00000
24" Lg. Lanyard for 1" OD Caps	000000000	00000
3 ft. Lg. Lanyard for 1" OD Caps	000000000	00000