Plastic Cap Nuts | McMaster-Carr

Filter by

Material

System of Measurement

Thread Size

Color

Nut Type

Height

Thread Depth

Width

Cap Nut Profile

Nut Width

Thread Pitch

Inside Height

Thread Type

RoHS

REACH

Maximum Temperature

Attachment Type

Drive Style

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

Yes

DFARS Specialty Metals

Exempt

Thread Fit

Metric Class 6H

Unified Standard Class 2B

Export Control Classification Number (ECCN)

Thread Spacing

Minimum Temperature

Performance

50 Products

Cap Nuts

Conceal and protect protruding screw threads while fastening parts together. These nuts help prevent damage to surrounding materials and reduce injuries. Also known as acorn nuts, they have a smooth, rounded head that creates a finished look.

Plastic

Image of Product. Front orientation. Cap Nuts. Cap Nuts.

Nylon 6/6—Slippery and abrasion resistant, these nuts thread on smoothly and stand up to daily wear and tear. Nylon will swell and weaken when exposed to moisture, so it's best for dry environments.

								Pkg.
	Thread Size	Wd.	Ht.	Temp. Range, ° F	Choose a Color	Pkg. Qty.		1-9	10-49	50-Up
Nylon 6/6



		4-40	1/4"	9/32"	-40 to 185	Black , Off-White	100	94922A300	000000	000000	000000


		6-32	19/64"	11/32"	-40 to 185	Black , Off-White	100	94922A305	00000	00000	00000
		8-32	21/64"	3/8"	-40 to 185	Black , Off-White	100	94922A310	00000	00000	00000
		10-24	23/64"	13/32"	-40 to 185	Black , Off-White	100	94922A315	00000	00000	00000
		10-32	23/64"	13/32"	-40 to 185	Black , Off-White	100	94922A320	00000	00000	00000
		1/4"-20	27/64"	15/32"	-40 to 185	Black , Off-White	100	94922A325	00000	00000	00000
		1/4"-28	27/64"	15/32"	-40 to 185	Black , Off-White	100	94922A330	00000	00000	00000
		5/16"-18	1/2"	17/32"	-40 to 185	Black , Off-White	50	94922A335	00000	00000	00000
		5/16"-24	1/2"	17/32"	-40 to 185	Black , Off-White	50	94922A340	00000	00000	00000
		3/8"-16	9/16"	5/8"	-40 to 185	Black , Off-White	25	94922A345	00000	00000	00000
		3/8"-24	9/16"	5/8"	-40 to 185	Black , Off-White	25	94922A350	00000	00000	0000


		7/16"-14	3/4"	13/16"	-40 to 185	Black , Off-White	10	94922A430	0000	0000	0000
		1/2"-13	3/4"	13/16"	-40 to 185	Black , Off-White	25	94922A355	00000	00000	00000
		1/2"-20	3/4"	13/16"	-40 to 185	Black , Off-White	10	94922A360	0000	0000	0000
		5/8"-11	15/16"	31/32"	-40 to 185	Black , Off-White	20	94922A365	00000	00000	00000
		M4 × 0.7 mm	7 mm	8 mm	-40 to 185	Black , Off-White	100	90527A505	00000	00000	00000
		M5 × 0.8 mm	8 mm	10 mm	-40 to 185	Black , Off-White	100	90527A510	00000	00000	00000
		M6 × 1 mm	10 mm	12 mm	-40 to 185	Black , Off-White	100	90527A515	00000	00000	00000
		M8 × 1.25 mm	13 mm	15 mm	-40 to 185	Black , Off-White	50	90527A520	00000	00000	00000
		M10 × 1.5 mm	17 mm	18 mm	-40 to 185	Black , Off-White	25	90527A525	00000	00000	00000
		M12 × 1.75 mm	19 mm	20.5 mm	-40 to 185	Black , Off-White	25	90527A530	00000	00000	00000

Caps for Hex Nuts

Cap Installed on Hex

Nut

Image of Product. Front orientation. Protective Caps. Caps for Hex Nuts.

Seal out moisture and dirt to prevent corrosion and buildup on threads. These caps snap onto hex nuts for a tight fit.

Polyethylene—These tough caps are hard and wear resistant to hold up against scrapes and gouges.

	Inside Ht.	Flexibility	Max. Temp., ° F	Color	Pkg. Qty.		Pkg.
Polyethylene



	7/16"	29/64"	Rigid	170	Black	10	9267K55	00000


	1/2"	17/32"	Rigid	170	Black	10	9267K41	0000
	35/64"	1/2"	Rigid	170	Black	10	9267K43	0000
	43/64"	25/32"	Rigid	170	Black	10	9267K31	0000
	3/4"	27/32"	Rigid	170	Black	10	9267K45	00000
	7/8"	15/16"	Rigid	170	Black	5	9267K32	0000
	15/16"	1"	Rigid	170	Black	5	9267K47	00000
	1 1/16"	1"	Rigid	170	Black	5	9267K33	0000
	1 1/4"	1 13/32"	Rigid	170	Black	5	9267K34	00000
	1 13/32"	1 7/16"	Rigid	170	Black	5	9267K35	00000
	1 5/8"	1 23/32"	Rigid	170	Black	1	9267K36	0000


	1 13/16"	2"	Rigid	170	Black	1	9267K17	0000
	1 31/32"	2 3/32"	Rigid	170	Black	1	9267K18	00000
	2 3/16"	2 19/64"	Rigid	170	Black	1	9267K51	00000
	2 3/8"	2 5/16"	Rigid	170	Black	1	9267K52	00000
	2 9/16"	2 19/64"	Rigid	170	Black	1	9267K53	00000
	2 3/4"	2 29/64"	Rigid	170	Black	1	9267K54	00000

Retaining Caps

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.

	OD	Ht.	Insert Material	Min. Hardness	Temp. Range, ° F	Pkg. Qty.		Pkg.
Black Plastic



	5/32"	21/32"	23/64"	Steel	Rockwell C45	-90 to 150	50	90310A325	000000


	3/16"	21/32"	23/64"	Steel	Rockwell C45	-90 to 150	50	90310A335	00000
	1/4"	27/32"	23/64"	Steel	Rockwell C45	-90 to 150	50	90310A345	00000
	5/16"	27/32"	29/64"	Steel	Rockwell C45	-90 to 150	25	90310A355	00000
	3/8"	55/64"	15/32"	Steel	Rockwell C45	-90 to 150	25	90310A378	0000
	7/16"	53/64"	7/16"	Steel	Rockwell C45	-90 to 150	10	90310A372	0000
	1/2"	1 5/16"	41/64"	Steel	Rockwell C45	-90 to 150	10	90310A373	0000
	5/8"	1 5/16"	41/64"	Steel	Rockwell C45	-90 to 150	10	90310A374	0000


	White Plastic



			1/8"	21/32"	23/64"	Steel	Rockwell C45	-90 to 150	10	90310A315	00000


			3/16"	21/32"	11/32"	Steel	Rockwell C45	-90 to 150	25	90310A371	0000
			3/8"	55/64"	15/32"	Steel	Rockwell C45	-90 to 150	25	90310A377	0000


			Red Plastic



					5/16"	55/64"	15/32"	Steel	Rockwell C45	-90 to 150	25	90310A376	0000