Stainless Steel Acorn Nuts

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208 Products

Cap Nut Profile

Standard

The most commonly used cap nuts

184 products

High

Cover extra-long screws without cutting them

8 products

Cap Nut Profile

High Heavy

Large gripping area keeps wrenches from slipping off as you tighten

7 products

Open End

Thread onto screws of any length

9 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.

Stainless Steel

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

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

Black-Oxide 18-8 Stainless Steel—Typically chosen for their appearance, these nuts have a dark, matte coating. They resist rust in wet and outdoor environments but won't hold up to the harsh chemicals that 316 stainless steel can.

Highly Corrosion-Resistant 316 Stainless Steel—Our most corrosion-resistant cap nuts, these hold up in just about any environment. They won't degrade from exposure to weather, salt water, and most chemicals.

	Thread Size	Thread Dp.	Wd.	Ht.	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel



		0-80	1/16"	3/16"	3/16"	—	—	1	91855A101	00000


		1-72	1/16"	3/16"	3/16"	—	—	1	91855A102	0000
		2-56	5/64"	3/16"	3/16"	—	—	1	91855A103	0000
		3-48	5/64"	1/4"	1/4"	—	—	1	91855A104	0000
		4-40	5/32"	1/4"	1/4"	—	Material Certificate	10	99022A101	0000
		4-48	5/32"	1/4"	1/4"	—	—	10	91855A670	0000
		5-40	1/8"	5/16"	11/32"	—	Material Certificate	1	91855A105	0000
		6-32	5/32"	5/16"	11/32"	—	Material Certificate	10	91855A430	0000
		6-32	3/16"	5/16"	9/32"	—	Material Certificate	10	99022A102	0000
		6-40	5/32"	5/16"	11/32"	—	—	10	91855A680	00000
		8-32	5/32"	5/16"	11/32"	—	Material Certificate	10	91855A440	0000


		8-32	3/16"	5/16"	9/32"	—	Material Certificate	10	99022A103	0000
		8-36	5/32"	5/16"	11/32"	—	Material Certificate	10	91855A690	00000
		10-24	3/16"	3/8"	13/32"	—	Material Certificate	10	91855A450	0000
		10-24	7/32"	3/8"	11/32"	—	Material Certificate	10	99022A104	0000
		10-32	3/16"	3/8"	13/32"	—	Material Certificate	10	91855A460	0000
		10-32	7/32"	3/8"	11/32"	—	Material Certificate	10	99022A105	0000
		12-24	7/32"	3/8"	13/32"	—	—	10	91855A410	0000
		12-28	7/32"	3/8"	13/32"	—	Material Certificate	1	91855A640	0000
		1/4"-20	7/32"	7/16"	3/8"	—	Material Certificate	10	99022A106	00000
		1/4"-20	1/4"	7/16"	15/32"	—	Material Certificate	10	91855A520	00000


		1/4"-20	5/16"	7/16"	19/32"	—	—	10	91855A360	00000
		1/4"-28	7/32"	7/16"	3/8"	—	Material Certificate	10	99022A107	00000
		1/4"-28	1/4"	7/16"	15/32"	—	Material Certificate	10	91855A470	00000
		5/16"-18	9/32"	9/16"	7/16"	—	Material Certificate	5	99022A108	0000
		5/16"-18	5/16"	1/2"	17/32"	—	Material Certificate	10	91855A540	00000
		5/16"-24	9/32"	9/16"	7/16"	—	—	5	99022A109	0000
		5/16"-24	5/16"	1/2"	17/32"	—	—	10	91855A032	00000
		3/8"-16	5/16"	5/8"	1/2"	—	Material Certificate	5	99022A112	00000
		3/8"-16	3/8"	9/16"	5/8"	—	Material Certificate	5	91855A550	00000
		3/8"-24	5/16"	5/8"	1/2"	—	Material Certificate	5	99022A113	00000


		3/8"-24	3/8"	9/16"	5/8"	—	Material Certificate	5	91855A331	00000
		7/16"-14	3/8"	3/4"	9/16"	—	—	1	99022A114	0000
		7/16"-14	7/16"	5/8"	11/16"	—	—	1	91855A560	0000
		7/16"-20	3/8"	3/4"	9/16"	—	—	1	99022A115	0000
		7/16"-20	7/16"	5/8"	11/16"	—	—	1	91855A490	0000
		1/2"-13	3/8"	3/4"	9/16"	—	Material Certificate	1	99022A116	0000
		1/2"-13	1/2"	3/4"	13/16"	—	Material Certificate	1	91855A480	0000
		1/2"-20	3/8"	3/4"	9/16"	—	Material Certificate	1	99022A126	0000
		1/2"-20	1/2"	3/4"	13/16"	—	—	1	91855A333	0000
		9/16"-12	9/16"	7/8"	15/16"	—	—	1	91855A112	0000


		9/16"-18	9/16"	7/8"	15/16"	—	—	1	91855A113	0000
		5/8"-11	7/16"	15/16"	3/4"	—	Material Certificate	1	99022A117	00000
		5/8"-11	5/8"	15/16"	1"	—	Material Certificate	1	91855A420	00000
		5/8"-18	5/8"	15/16"	1"	—	—	1	91855A510	00000
		3/4"-10	1/2"	1 1/16"	7/8"	—	Material Certificate	1	99022A118	00000
		3/4"-10	3/4"	1 1/16"	1 5/32"	—	—	1	91855A530	00000
		3/4"-16	3/4"	1 1/16"	1 5/32"	—	Material Certificate	1	91855A114	00000
		7/8"-9	7/8"	1 1/4"	1 23/64"	—	Material Certificate	1	91855A115	00000
		7/8"-14	7/8"	1 1/4"	1 23/64"	—	—	1	91855A116	00000
		1"-8	1"	1 7/16"	1 35/64"	—	—	1	91855A117	00000

1"-14	1"	1 7/16"	1 33/64"	—	—	1	91855A700	00000
1 1/4"-7	1 1/4"	1 13/16"	1 61/64"	—	Material Certificate	1	91855A650	00000
M3 × 0.5 mm	3.8 mm	5.5 mm	6 mm	DIN 1587	—	10	94000A330	0000
M4 × 0.7 mm	5.7 mm	7 mm	8 mm	DIN 1587	Material Certificate	25	94000A035	0000
M5 × 0.8 mm	4.5 mm	8 mm	10 mm	DIN 1587	Material Certificate	25	94000A037	0000
M6 × 1 mm	7.7 mm	10 mm	12 mm	DIN 1587	Material Certificate	20	94000A038	0000
M8 × 1.25 mm	10.7 mm	13 mm	15 mm	DIN 1587	Material Certificate	10	94000A039	0000
M10 × 1.5 mm	12.7 mm	17 mm	18 mm	DIN 1587	—	5	94000A040	0000
M12 × 1.75 mm	15.7 mm	19 mm	22 mm	DIN 1587	—	5	94000A041	0000
M14 × 2 mm	17.7 mm	22 mm	25 mm	DIN 1587	—	1	94000A431	0000
M16 × 2 mm	20.6 mm	24 mm	28 mm	DIN 1587	—	1	94000A461	0000
M18 × 2.5 mm	24.6 mm	27 mm	32 mm	DIN 1587	Material Certificate	1	94000A490	0000
M20 × 2.5 mm	25.6 mm	30 mm	34 mm	DIN 1587	—	1	94000A510	0000
M22 × 2.5 mm	28.6 mm	34 mm	39 mm	DIN 1587	Material Certificate	1	94000A101	0000
M24 × 3 mm	30.5 mm	36 mm	42 mm	DIN 1587	—	1	94000A102	0000

Black-Oxide 18-8 Stainless Steel



		6-32	5/32"	5/16"	11/32"	—	Material Certificate	10	91855A121	0000


		8-32	5/32"	5/16"	11/32"	—	Material Certificate	10	91855A122	0000
		10-24	3/16"	3/8"	13/32"	—	Material Certificate	10	91855A123	00000
		10-32	3/16"	3/8"	13/32"	—	Material Certificate	10	91855A124	00000
		1/4"-20	1/4"	7/16"	15/32"	—	Material Certificate	10	91855A125	00000
		5/16"-18	5/16"	1/2"	17/32"	—	Material Certificate	5	91855A126	0000
		3/8"-16	3/8"	9/16"	5/8"	—	Material Certificate	1	91855A127	0000
		1/2"-13	1/2"	3/4"	13/16"	—	Material Certificate	1	91855A128	0000


		Highly Corrosion-Resistant 316 Stainless Steel



				2-56	5/64"	3/16"	3/16"	—	—	1	92994A101	00000


				4-40	5/32"	1/4"	1/4"	—	—	5	92994A005	00000
				5-40	1/8"	5/16"	11/32"	—	Material Certificate	1	92994A128	0000
				6-32	5/32"	5/16"	11/32"	—	—	5	92994A007	00000
				8-32	5/32"	5/16"	11/32"	—	—	5	92994A009	00000
				10-24	3/16"	3/8"	13/32"	—	—	5	92994A401	00000
				10-32	3/16"	3/8"	13/32"	—	Material Certificate	5	92994A402	00000
				12-24	7/32"	3/8"	13/32"	—	—	1	92994A133	0000
				1/4"-20	1/4"	7/16"	15/32"	—	Material Certificate	1	92994A029	0000
				1/4"-28	1/4"	7/16"	15/32"	—	—	1	92994A329	0000
				5/16"-18	5/16"	1/2"	17/32"	—	—	1	92994A030	0000


				5/16"-24	5/16"	1/2"	17/32"	—	—	1	92994A330	0000
				3/8"-16	3/8"	9/16"	5/8"	—	Material Certificate	1	92994A031	0000
				3/8"-24	3/8"	9/16"	5/8"	—	—	1	92994A331	0000
				7/16"-14	7/16"	5/8"	11/16"	—	—	1	92994A111	0000
				7/16"-20	7/16"	5/8"	11/16"	—	—	1	92994A112	0000
				1/2"-13	1/2"	3/4"	13/16"	—	Material Certificate	1	92994A033	0000
				1/2"-20	1/2"	3/4"	13/16"	—	Material Certificate	1	92994A034	0000
				9/16"-12	9/16"	7/8"	15/16"	—	—	1	92994A135	00000
				9/16"-18	9/16"	7/8"	15/16"	—	Material Certificate	1	92994A136	00000
				5/8"-11	5/8"	15/16"	1"	—	Material Certificate	1	92994A035	00000


				5/8"-18	5/8"	15/16"	1"	—	—	1	92994A113	00000
				3/4"-10	3/4"	1 1/16"	1 5/32"	—	Material Certificate	1	92994A038	00000
				3/4"-16	3/4"	1 1/16"	1 5/32"	—	Material Certificate	1	92994A114	00000
				7/8"-9	7/8"	1 1/4"	1 23/64"	—	Material Certificate	1	92994A137	00000
				7/8"-14	7/8"	1 1/4"	1 23/64"	—	Material Certificate	1	92994A138	00000
				1"-8	1"	1 7/16"	1 35/64"	—	—	1	92994A139	00000
				1"-12	1"	1 7/16"	1 35/64"	—	—	1	92994A141	00000
				1"-14	1"	1 7/16"	1 35/64"	—	—	1	92994A142	00000
				1 1/4"-7	1 1/4"	1 13/16"	1 61/64"	—	Material Certificate	1	92994A143	00000
				1 1/4"-12	1 1/4"	1 13/16"	1 61/64"	—	Material Certificate	1	92994A144	00000


				M3 × 0.5 mm	3.8 mm	5.5 mm	6 mm	DIN 1587	—	25	95514A101	0000
				M4 × 0.7 mm	5.5 mm	7 mm	8 mm	DIN 1587	—	25	95514A102	0000
				M5 × 0.8 mm	4.5 mm	8 mm	10 mm	DIN 1587	Material Certificate	25	95514A103	0000
				M6 × 1 mm	8 mm	10 mm	12 mm	DIN 1587	Material Certificate	25	95514A104	00000
				M8 × 1.25 mm	11 mm	13 mm	15 mm	DIN 1587	Material Certificate	10	95514A105	0000
				M10 × 1.5 mm	13 mm	17 mm	18 mm	DIN 1587	Material Certificate	10	95514A106	00000
M12 × 1.75 mm				16 mm	19 mm	22 mm	DIN 1587	—	5	95514A107	00000
M14 × 2 mm	18 mm			22 mm	25 mm	DIN 1587	—	1	95514A108	0000
M16 × 2 mm	21 mm			24 mm	28 mm	DIN 1587	—	1	95514A109	0000
M20 × 2.5 mm	26 mm			30 mm	34 mm	DIN 1587	—	1	95514A111	00000


M22 × 2.5 mm	29 mm			34 mm	39 mm	DIN 1587	Material Certificate	1	95514A112	00000
M24 × 3 mm	31 mm			36 mm	42 mm	DIN 1587	—	1	95514A113	00000

Cap Nuts with Threadlocker

These nuts not only conceal and protect protruding screw threads, they also resist loosening from mild vibration. They have a nylon patch bonded to their threads that grips screws for a tighter hold than standard cap nuts. They’re reusable a handful of times, but the patch’s holding power decreases with each use. Also known as acorn nuts, they have a smooth, rounded head that creates a finished look.

Stainless Steel

Image of Product. Front orientation. Contains Annotated, Border. Cap Nuts. Cap Nuts with Threadlocker.

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

	Thread Dp.	Wd.	Ht.	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	10-24	3/16"	3/8"	13/32"	—	Material Certificate	5	90421A110	000000


	10-32	3/16"	3/8"	13/32"	—	Material Certificate	5	90421A120	00000
	12-24	7/32"	3/8"	13/32"	—	—	5	90421A130	00000
	1/4"-20	1/4"	7/16"	15/32"	—	Material Certificate	5	90421A140	00000
	1/4"-28	1/4"	7/16"	15/32"	—	—	5	90421A150	00000
	5/16"-18	19/64"	1/2"	17/32"	—	Material Certificate	5	90421A160	00000
	3/8"-16	3/8"	9/16"	5/8"	—	Material Certificate	5	90421A170	00000
	3/8"-24	3/8"	9/16"	5/8"	—	—	5	90421A180	00000
	7/16"-14	7/16"	5/8"	45/64"	—	—	1	90421A190	0000
	1/2"-13	1/2"	3/4"	13/16"	—	—	1	90421A210	0000
	5/8"-11	5/8"	15/16"	1"	—	—	1	90421A220	00000


	3/4"-10	3/4"	1 1/16"	1 5/32"	—	—	1	90421A230	00000
	M5 × 0.8 mm	5.6 mm	8 mm	10 mm	DIN 1587	Material Certificate	5	90428A110	00000
	M6 × 1 mm	5.7 mm	10 mm	12 mm	DIN 1587	—	5	90428A120	00000
	M8 × 1.25 mm	8.2 mm	13 mm	15 mm	DIN 1587	Material Certificate	5	90428A130	00000
	M10 × 1.5 mm	9.7 mm	17 mm	18 mm	DIN 1587	—	1	90428A140	00000
	M12 × 1.75 mm	12.2 mm	19 mm	22 mm	DIN 1587	—	1	90428A150	00000


	Black-Oxide 18-8 Stainless Steel



			10-32	3/16"	3/8"	13/32"	—	—	5	90421A320	00000


			1/4"-20	1/4"	7/16"	15/32"	—	Material Certificate	5	90421A340	00000


			Highly Corrosion-Resistant 316 Stainless Steel



					10-24	3/16"	3/8"	13/32"	—	Material Certificate	5	93052A110	00000


					10-32	3/16"	3/8"	13/32"	—	—	5	93052A120	00000
					1/4"-20	1/4"	7/16"	15/32"	—	—	5	93052A130	00000
					5/16"-18	5/16"	1/2"	17/32"	—	—	1	93052A140	0000
					3/8"-16	3/8"	9/16"	5/8"	—	—	1	93052A150	0000
					1/2"-13	1/2"	3/4"	13/16"	—	Material Certificate	1	93052A160	00000
					5/8"-11	5/8"	15/16"	1"	—	Material Certificate	1	93052A170	00000

Sanitary Cap Nuts

With extremely smooth sides and rounded edges, these nuts are free of crevices where bacteria can grow. Use them to cover and protect exposed threads while fastening parts together. Nuts are certified by EHEDG to meet sanitary design standards. They have a Buna-N seal on the base that keeps liquid, debris, and other contaminants off the threads. The seal is made with metal and chemical additives, so you can find it with a metal detector or X-ray machine if it falls into your line. Also known as acorn nuts, these have a domed head to create a finished look.

Stainless Steel

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

Highly Corrosion-Resistant 316 Stainless Steel—Won't corrode from frequent washdowns and can stand up to the harshest cleaners and detergents.

	Thread Dp.	Wd.	Ht.	Seal Material	Certification	Food Industry Std.		Each
Highly Corrosion-Resistant 316 Stainless Steel



	1/4"-20	1/4"	7/16"	21/64"	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A160	00000


	5/16"-18	9/32"	1/2"	25/64"	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A170	0000
	3/8"-16	5/16"	9/16"	15/32"	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A180	00000
	7/16"-14	21/64"	11/16"	33/64"	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A190	00000
	1/2"-13	11/32"	3/4"	35/64"	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A200	00000
	5/8"-11	7/16"	15/16"	43/64"	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A210	00000
	M6 × 1 mm	5.5 mm	10 mm	8 mm	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A110	00000
	M8 × 1.25 mm	6.5 mm	13 mm	10 mm	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A120	00000
	M10 × 1.5 mm	8 mm	16 mm	12 mm	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A130	00000
	M12 × 1.75 mm	9 mm	18 mm	14 mm	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A140	00000
	M16 × 2 mm	10.5 mm	24 mm	17 mm	Buna-N	EHEDG Certified	FDA Compliant 21 CFR 177.2600	97511A150	00000

High-Heavy-Profile Cap Nuts

20% wider and taller than standard cap nuts, these have high, flat sides so your wrench won't slip off as you tighten. They cover screws to protect the threads and to prevent damage to surrounding materials. Also known as acorn nuts, they have a smooth, rounded head to create a finished look.

Stainless Steel

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

	Thread Dp.	Wd.	Ht.	Certificate Type		Each
18-8 Stainless Steel



	1/4"-20	3/8"	5/8"	5/8"	Material Certificate	92040A109	00000


	5/16"-18	3/8"	5/8"	5/8"	—	92040A110	0000
	3/8"-16	15/32"	3/4"	3/4"	—	92040A120	0000
	1/2"-13	19/32"	7/8"	15/16"	Material Certificate	92040A130	00000
	5/8"-11	25/32"	1 1/16"	1 3/16"	Material Certificate	92040A140	00000
	3/4"-10	29/32"	1 1/4"	1 3/8"	Material Certificate	92040A150	00000
	7/8"-9	1 1/16"	1 7/16"	1 5/8"	—	92040A160	00000

Distorted-Thread Cap Nuts

For a stronger hold than nylon-insert cap nuts, these have irregularly shaped threads that grip the screw to resist loosening. The threads prevent the nut from backing out in high-vibration applications, but they also increase the effort to install and remove. To get these nuts off, you may need special tools, such as an impact wrench or propane torch. They have a smooth, rounded head that conceals and protects protruding screw threads while creating a finished look. Nuts are not reusable.

Stainless Steel

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

	Thread Dp.	Wd.	Ht.	Certificate Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	4-40	5/32"	1/4"	1/4"	—	10	90507A209	000000


	6-32	5/32"	5/16"	11/32"	Material Certificate	10	90507A210	00000
	8-32	5/32"	5/16"	11/32"	—	10	90507A215	00000
	10-24	3/16"	3/8"	13/32"	—	10	90507A220	00000
	10-32	3/16"	3/8"	13/32"	—	10	90507A225	00000
	1/4"-20	1/4"	7/16"	15/32"	—	10	90507A230	00000
	1/4"-28	1/4"	7/16"	15/32"	Material Certificate	10	90507A235	00000
	5/16"-18	5/16"	1/2"	17/32"	—	5	90507A240	00000
	5/16"-24	5/16"	1/2"	17/32"	—	5	90507A245	00000
	3/8"-16	3/8"	9/16"	5/8"	Material Certificate	5	90507A250	00000
	3/8"-24	3/8"	9/16"	5/8"	—	5	90507A255	00000


	7/16"-14	7/16"	5/8"	11/16"	—	1	90507A275	0000
	7/16"-20	7/16"	5/8"	11/16"	—	1	90507A276	0000
	1/2"-13	1/2"	3/4"	13/16"	—	1	90507A033	00000
	1/2"-20	1/2"	3/4"	13/16"	—	1	90507A044	00000
	5/8"-11	19/32"	1"	63/64"	—	1	90507A260	0000
	3/4"-10	11/16"	1 1/16"	1 3/16"	—	1	90507A270	0000


	Highly Corrosion-Resistant 316 Stainless Steel



			8-32	5/32"	5/16"	11/32"	—	1	90431A110	0000


			10-24	3/16"	3/8"	13/32"	Material Certificate	1	90431A120	0000
			10-32	3/16"	3/8"	13/32"	Material Certificate	1	90431A130	0000
			1/4"-20	1/4"	7/16"	15/32"	—	1	90431A140	0000
			5/16"-18	5/16"	1/2"	17/32"	—	1	90431A150	0000
			3/8"-16	3/8"	9/16"	5/8"	—	1	90431A160	0000
			1/2"-13	1/2"	3/4"	13/16"	—	1	90431A170	00000

Open-End Cap Nuts

The open top allows threads to stick out slightly, so you don't have to worry about picking the wrong thread depth. These nuts also engage more threads than standard nuts for a tighter hold. The smooth, curved head creates a finished look, while still partially concealing and protecting the sides of the screw from damage.

Stainless Steel

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

	Thread Dp.	Wd.	Ht.	Certificate Type		Each
18-8 Stainless Steel



	4-40	1/4"	5/16"	1/4"	—	94301A105	00000


	6-32	1/4"	5/16"	1/4"	—	94301A110	0000
	8-32	1/4"	3/8"	1/4"	—	94301A115	0000
	10-24	5/16"	7/16"	5/16"	—	94301A120	0000
	10-32	5/16"	7/16"	5/16"	—	94301A125	0000
	1/4"-20	5/16"	1/2"	5/16"	—	94301A130	0000
	5/16"-18	5/16"	9/16"	5/16"	—	94301A135	0000
	3/8"-16	3/8"	11/16"	3/8"	Material Certificate	94301A140	0000
	1/2"-13	1/2"	3/4"	1/2"	—	94301A160	0000

High-Profile Cap Nuts

Three times the thread depth of standard cap nuts, these cover and protect extra-long, protruding screws, so you don't have to cut them when fastening parts together. They 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.

Stainless Steel

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

	Thread Dp.	Wd.	Ht.	Certificate Type		Each
18-8 Stainless Steel



	3/8"-16	3/4"	9/16"	1 1/16"	Material Certificate	90023A101	000000


	3/8"-16	1"	9/16"	1 5/16"	—	90023A102	00000
	3/8"-16	1 1/4"	9/16"	1 9/16"	—	90023A103	00000
	1/2"-13	1"	3/4"	1 7/16"	—	90023A104	00000
	1/2"-13	1 1/4"	3/4"	1 3/4"	—	90023A105	00000
	1/2"-13	1 1/2"	3/4"	2"	Material Certificate	90023A106	00000

Sealing Cap Nuts

Keep liquid, gas, debris, and other contaminants from seeping into or out of machinery, with no need for a separate O-ring. These nuts are often used outdoors to protect enclosures and other equipment from harsh weather. They also withstand high pressure, so they are useful for sealing pneumatic pumps and pressure valves. Also known as acorn nuts, they conceal protruding screw threads while fastening parts together and have a smooth, rounded head for a finished look.

Stainless Steel

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

	Thread Dp.	Wd.	Ht.	Seal Material	Seal Temp. Range, ° F	Max. Pressure, psi		Each
18-8 Stainless Steel



	8-32	5/32"	5/16"	5/16"	Silicone Rubber	-80 to 400	1,200	90194A110	00000


	10-32	3/16"	3/8"	25/64"	Silicone Rubber	-80 to 400	1,200	90194A120	0000
	1/4"-20	1/4"	7/16"	15/32"	Silicone Rubber	-80 to 400	1,200	90194A130	0000
	3/8"-16	3/8"	5/8"	5/8"	Silicone Rubber	-80 to 400	1,200	90194A140	0000
	1/2"-13	1/2"	3/4"	13/16"	Silicone Rubber	-80 to 400	1,200	90194A150	0000

High-Profile Sanitary Cap Nuts

Cover and protect 4" of exposed threads in food plants and other sanitary environments with these extra-long cap nuts. They are free of crevices where bacteria can grow and have a Buna-N seal on the base to keep liquid, debris, and other contaminants off the threads. The seal is made with metal and chemical additives, so you can find it with a metal detector or X-ray machine if it falls into your line. Nuts have a smooth, rounded head to create a finished look.

Stainless Steel

304 Stainless Steel—Won't corrode from frequent washdowns and can stand up to most cleaners and detergents.

	Thread Dp.	Wd.	Ht.	Seal Material	Food Industry Std.		Each
304 Stainless Steel



	5/8"-11	29/32"	7/8"	4 5/32"	Buna-N	FDA Compliant 21 CFR 177.2600	97513A101	000000


	3/4"-10	29/32"	1"	4 5/32"	Buna-N	FDA Compliant 21 CFR 177.2600	97513A102	00000

Cap Nut Assortments

With a range of sizes on hand, you can use these assortments to conceal and protect protruding screw threads while fastening a variety of parts. Also known as acorn nuts, they have a smooth, rounded head that creates a finished look.

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

	No. of Pieces	Container Type		Each
18-8 Stainless Steel



	6-32, 8-32, 10-32, 1/4"-20, 5/16"-18, 3/8"-16	200	Plastic Box	91987A800	0000000