Jet Nuts | McMaster-Carr

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Finish

Cadmium Yellow-Chromate Plated

Phosphate Coated

Silver Plated

Zinc Plated

Zinc Yellow-Chromate Plated

Width

Material

Fastener Strength Grade/Class

Thread Pitch

Specifications Met

Performance

Flange Thickness

Thread Spacing

Thread Type

Thread Fit

Unified Standard Class 2B

Unified Standard Class 3B

Fastener Strength Rating

Low

Medium

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DFARS Specialty Metals

REACH

RoHS

Export Control Classification Number (ECCN)

EAR99

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

Yes

Distorted Thread Type

126 Products

Performance

High Strength

Withstand heavy loads and high stress without cracking

68 products

Corrosion Resistant

Won't rust in wet and outdoor environments

29 products

Certification

Mil. Spec.

Meet U.S. military standards and have the strongest hold

33 products

Distorted-Thread Flange Nuts

The strongest hold of all the flange nuts we offer, these have irregularly shaped threads that grip the screw to resist loosening. The threads prevent the nut from backing out due to high vibration, 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, so they are not reusable. Nuts have a flange that distributes pressure evenly across the mounting surface without the need for a separate washer. They are ideal for securing screws in oversized or irregularly shaped holes since the flange covers a larger area than standard nuts. Also known as collar nuts.

Medium-Strength Steel

Image of Product. Bottom orientation. Flange Nuts. Distorted-Thread Flange Nuts.

Rated Grade 5, Grade F, or Class 8, these nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Black Phosphate-Coated Steel—The dark coating creates both a finished appearance and a barrier against rust that withstands occasional exposure to moisture.

				Flange
	Thread Size	Wd.	Ht.	Dia.	Thk.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		1/4"-20	7/16"	15/64"	9/16"	0.05"	SAE Grade 5	—	100	90426A320	00000


		5/16"-18	1/2"	9/32"	11/16"	0.05"	SAE Grade 5	—	100	90426A330	0000
		5/16"-24	1/2"	9/32"	11/16"	0.05"	SAE Grade 5	—	100	90426A340	0000
		3/8"-16	9/16"	11/32"	3/4"	0.06"	SAE Grade 5	—	100	90426A350	00000
		7/16"-14	11/16"	25/64"	15/16"	0.06"	SAE Grade 5	—	50	90426A360	00000
		7/16"-20	11/16"	25/64"	15/16"	0.06"	SAE Grade 5	—	50	90426A370	00000
		1/2"-13	3/4"	29/64"	1 1/32"	0.08"	SAE Grade 5	—	50	90426A380	00000
		1/2"-20	3/4"	29/64"	1 1/32"	0.08"	SAE Grade 5	—	50	90426A390	00000
		5/8"-11	15/16"	9/16"	1 9/32"	0.09"	SAE Grade 5	—	10	90426A410	0000
		3/4"-10	1 1/8"	43/64"	1 37/64"	0.11"	SAE Grade 5	—	10	90426A420	0000
		7/8"-9	1 5/16"	25/32"	1 3/4"	0.13"	SAE Grade 5	—	5	90426A430	00000


		1"-8	1 1/2"	29/32"	2 1/16"	0.13"	SAE Grade 5	—	1	90426A440	0000
		1"-14	1 1/2"	29/32"	2 1/16"	0.13"	SAE Grade 5	—	1	90426A450	0000
		M5 × 0.8 mm	8 mm	6.2 mm	11.8 mm	1 mm	Class 8	DIN 6927	50	90426A160	00000
		M6 × 1 mm	10 mm	7.3 mm	14.2 mm	1.1 mm	Class 8	DIN 6927	50	90426A110	00000
		M8 × 1.25 mm	13 mm	9.4 mm	17.9 mm	1.2 mm	Class 8	DIN 6927	50	90426A120	00000
		M10 × 1.25 mm	15 mm	11.4 mm	21.8 mm	1.5 mm	Class 8	DIN 6927	25	90426A170	00000
		M10 × 1.5 mm	15 mm	11.4 mm	21.8 mm	1.5 mm	Class 8	DIN 6927	25	90426A130	00000
		M12 × 1.75 mm	18 mm	13.8 mm	26 mm	1.8 mm	Class 8	DIN 6927	25	90426A140	00000
		M16 × 2 mm	24 mm	18.3 mm	34.5 mm	2.4 mm	Class 8	DIN 6927	10	90426A150	00000


		Black Phosphate-Coated Steel



				1/4"-20	7/16"	15/64"	9/16"	0.05"	SAE Grade 5	—	100	90426A210	0000


				5/16"-18	1/2"	9/32"	11/16"	0.05"	SAE Grade 5	—	100	90426A220	0000
				3/8"-16	9/16"	11/32"	3/4"	0.06"	SAE Grade 5	—	100	90426A230	00000
				7/16"-14	11/16"	25/64"	15/16"	0.06"	SAE Grade 5	—	50	90426A240	00000
				7/16"-20	11/16"	25/64"	15/16"	0.06"	SAE Grade 5	—	50	90426A250	00000
				1/2"-13	3/4"	29/64"	1 1/32"	0.08"	SAE Grade 5	—	50	90426A260	00000
				1/2"-20	3/4"	29/64"	1 1/32"	0.08"	SAE Grade 5	—	50	90426A270	00000
				5/8"-11	15/16"	9/16"	1 9/32"	0.09"	SAE Grade 5	—	10	90426A280	0000
				3/4"-10	1 1/8"	43/64"	1 37/64"	0.11"	SAE Grade 5	—	10	90426A290	0000
				1"-8	1 1/2"	29/32"	2 1/16"	0.13"	SAE Grade 5	—	1	90426A310	0000

High-Strength Steel

Rated Grade 8, Grade G, or Class 10, these are about 25% stronger than medium-strength steel nuts. They are commonly used to fasten components in valves, pumps, and motors. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.

Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Black Phosphate-Coated Steel—The dark coating creates both a finished appearance and a barrier against rust that withstands occasional exposure to moisture.

				Flange
	Thread Size	Wd.	Ht.	Dia.	Thk.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		M6 × 1 mm	10 mm	7.3 mm	14.2 mm	1.1 mm	Class 10	DIN 6927, EN 1664, ISO 7044	50	3528N11	000000


		M8 × 1.25 mm	13 mm	9.4 mm	17.9 mm	1.2 mm	Class 10	DIN 6927, EN 1664, ISO 7044	25	3528N12	00000
		M10 × 1.5 mm	15 mm	11.4 mm	21.8 mm	1.5 mm	Class 10	DIN 6927, EN 1664, ISO 7044	10	3528N13	0000
		M12 × 1.75 mm	18 mm	13.8 mm	26 mm	1.8 mm	Class 10	DIN 6927, EN 1664, ISO 7044	10	3528N14	00000
		M14 × 2 mm	21 mm	15.9 mm	29.9 mm	2.1 mm	Class 10	DIN 6927, EN 1664, ISO 7044	5	3528N15	00000
		M16 × 2 mm	24 mm	18.3 mm	34.5 mm	2.4 mm	Class 10	DIN 6927, EN 1664, ISO 7044	1	3528N16	0000
		M20 × 2.5 mm	30 mm	22.4 mm	42.8 mm	3 mm	Class 10	DIN 6927, EN 1664, ISO 7044	1	3528N17	0000


		Zinc-Yellow-Chromate-Plated Steel



				1/4"-20	7/16"	19/64"	9/16"	0.04"	ASME Grade G	—	50	90949A212	00000


				1/4"-28	7/16"	19/64"	9/16"	0.04"	ASME Grade G	—	50	90949A213	00000
				5/16"-18	1/2"	23/64"	11/16"	0.05"	ASME Grade G	—	25	90949A214	00000
				5/16"-24	1/2"	23/64"	11/16"	0.05"	ASME Grade G	—	25	90949A215	00000
				3/8"-16	9/16"	27/64"	13/16"	0.06"	ASME Grade G	—	25	90949A216	00000
				3/8"-24	9/16"	27/64"	13/16"	0.06"	ASME Grade G	—	25	90949A217	00000
				1/2"-13	3/4"	9/16"	1 1/16"	0.08"	ASME Grade G	—	10	90949A218	00000
				1/2"-20	3/4"	9/16"	1 1/16"	0.08"	ASME Grade G	—	10	90949A219	00000
				5/8"-11	15/16"	11/16"	1 21/64"	0.1"	ASME Grade G	—	10	90949A221	00000
				5/8"-18	15/16"	11/16"	1 21/64"	0.1"	ASME Grade G	—	10	90949A222	00000
				3/4"-10	1 1/8"	13/16"	1 37/64"	0.11"	ASME Grade G	—	5	90949A223	00000


				Black-Oxide Steel



						1/4"-20	7/16"	19/64"	9/16"	0.04"	ASME Grade G	—	50	90949A224	00000


						1/4"-28	7/16"	19/64"	9/16"	0.04"	ASME Grade G	—	50	90949A225	00000
						5/16"-18	1/2"	23/64"	11/16"	0.05"	ASME Grade G	—	25	90949A226	00000
						5/16"-24	1/2"	23/64"	11/16"	0.05"	ASME Grade G	—	25	90949A227	00000
						3/8"-16	9/16"	27/64"	13/16"	0.06"	ASME Grade G	—	25	90949A228	00000
						3/8"-24	9/16"	27/64"	13/16"	0.06"	ASME Grade G	—	25	90949A229	00000
						1/2"-13	3/4"	9/16"	1 1/16"	0.08"	ASME Grade G	—	10	90949A231	00000
						1/2"-20	3/4"	9/16"	1 1/16"	0.08"	ASME Grade G	—	10	90949A232	00000
						5/8"-11	15/16"	11/16"	1 21/64"	0.1"	ASME Grade G	—	10	90949A233	00000
						5/8"-18	15/16"	11/16"	1 21/64"	0.1"	ASME Grade G	—	10	90949A234	00000
						3/4"-10	1 1/8"	13/16"	1 37/64"	0.11"	ASME Grade G	—	5	90949A235	00000


						M6 × 1 mm	10 mm	7.3 mm	14.2 mm	1.1 mm	Class 10	DIN 6927, EN 1664, ISO 7044	25	3528N21	0000
						M8 × 1.25 mm	13 mm	9.4 mm	17.9 mm	1.2 mm	Class 10	DIN 6927, EN 1664, ISO 7044	10	3528N22	0000
						M10 × 1.5 mm	15 mm	11.4 mm	21.8 mm	1.5 mm	Class 10	DIN 6927, EN 1664, ISO 7044	10	3528N23	0000
						M12 × 1.75 mm	18 mm	13.8 mm	26 mm	1.8 mm	Class 10	DIN 6927, EN 1664, ISO 7044	10	3528N24	0000
						M14 × 2 mm	21 mm	15.9 mm	29.9 mm	2.1 mm	Class 10	DIN 6927, EN 1664, ISO 7044	5	3528N25	0000
						M16 × 2 mm	24 mm	18.3 mm	34.5 mm	2.4 mm	Class 10	DIN 6927, EN 1664, ISO 7044	1	3528N26	0000


						Black Phosphate-Coated Steel



1/4"-20								7/16"	19/64"	9/16"	0.04"	ASME Grade G	—	100	90949A016	0000


1/4"-28	7/16"							19/64"	9/16"	0.04"	ASME Grade G	—	100	90949A018	0000
5/16"-18	1/2"							23/64"	11/16"	0.05"	ASME Grade G	—	100	90949A025	00000
5/16"-24	1/2"							23/64"	11/16"	0.05"	ASME Grade G	—	100	90949A029	00000
3/8"-16	9/16"							27/64"	13/16"	0.06"	ASME Grade G	—	50	90949A031	00000
3/8"-24	9/16"							27/64"	13/16"	0.06"	ASME Grade G	—	25	90949A211	00000
1/2"-13	3/4"							9/16"	1 1/16"	0.08"	ASME Grade G	—	25	90949A033	00000
1/2"-20	3/4"							9/16"	1 1/16"	0.08"	ASME Grade G	—	25	90949A037	00000
5/8"-11	15/16"							11/16"	1 21/64"	0.1"	ASME Grade G	—	10	90949A110	00000
5/8"-18	15/16"							11/16"	1 21/64"	0.1"	ASME Grade G	—	10	90949A112	0000
3/4"-10	1 1/8"							53/64"	1 37/64"	0.11"	ASME Grade G	—	10	90949A115	00000


3/4"-16	1 1/8"	53/64"						1 37/64"	0.11"	ASME Grade G	—	10	90949A119	00000
7/8"-9	1 5/16"	51/64"	1 3/4"					0.12"	ASME Grade G	—	5	90949A124	00000
7/8"-14	1 5/16"	51/64"	1 3/4"					0.12"	ASME Grade G	—	5	90949A127	00000
1"-8	1 1/2"	57/64"	2 1/16"					0.13"	ASME Grade G	—	5	90949A133	00000
1"-14	1 1/2"	57/64"	2 1/16"					0.13"	ASME Grade G	—	5	90949A135	00000

Corrosion-Resistant 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.

				Flange
	Thread Size	Wd.	Ht.	Dia.	Thk.	Pkg. Qty.		Pkg.
18-8 Stainless Steel



		6-32	5/16"	11/64"	0.422"	0.02"	5	90423A110	00000


		8-32	11/32"	13/64"	0.469"	0.02"	5	90423A120	0000
		10-24	3/8"	7/32"	0.5"	0.03"	5	90423A130	0000
		10-32	3/8"	7/32"	0.5"	0.03"	5	90423A150	0000
		12-24	7/16"	15/64"	0.594"	0.04"	5	90423A140	00000
		1/4"-20	7/16"	15/64"	0.594"	0.04"	10	98892A131	0000
		1/4"-28	7/16"	15/64"	0.594"	0.04"	1	90423A160	0000
		5/16"-18	1/2"	9/32"	0.68"	0.04"	10	98892A132	0000
		3/8"-16	9/16"	11/32"	0.75"	0.04"	10	98892A133	0000
		3/8"-24	9/16"	11/32"	0.75"	0.04"	1	90423A170	0000
		1/2"-13	3/4"	29/64"	1.031"	0.04"	5	98892A134	00000


		1/2"-20	3/4"	29/64"	1.031"	0.05"	1	90423A180	0000

Mil. Spec. Distorted-Thread Flange Nuts

Not only do these have the strongest hold of all the flange nuts we offer, they are also manufactured and tested to strict U.S. military standards for material and construction. They have irregularly shaped threads that grip the screw to resist loosening in high-vibration applications. The threads prevent the nut from backing out, 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, so they are not reusable. Nuts have a flange that distributes pressure evenly across the mounting surface without the need for a separate washer. They are ideal for securing screws in oversized or irregularly shaped holes since the flange covers a larger area than standard nuts. Also known as collar nuts.

Low-Strength Steel

Image of Product. Front orientation. Flange Nuts. Mil. Spec. Distorted-Thread Flange Nuts.

About half the strength of medium-strength steel nuts. Use them with screws that have a similar strength rating to avoid stripping threads during installation.

Cadmium-Plated Steel—The plating reduces friction during installation, so these nuts thread on smoother than others. It also creates a barrier against rust that's comparable to zinc yellow-chromate plating.

Cadmium Yellow-Chromate-Plated Steel—Better corrosion resistance than plain cadmium. These nuts withstand salt water and are suitable for most wet and outdoor environments.

				Flange
	Thread Size	Wd.	Ht.	Dia.	Thk.	Mil. Spec.	Pkg. Qty.		Pkg.
Cadmium-Plated Steel



		2-56	1/8"	3/32"	0.167"	0.01"	MS21042L02	5	95307A801	00000


		4-40	5/32"	1/8"	0.206"	0.03"	MS21042L04	5	95307A802	0000
		6-32	3/16"	9/64"	0.244"	0.03"	MS21042L06	5	95307A803	0000
		8-32	7/32"	3/16"	0.29"	0.03"	MS21042L08	5	95307A804	0000
		10-32	1/4"	3/16"	0.33"	0.03"	MS21042L3	5	95307A805	0000
		1/4"-28	5/16"	7/32"	0.42"	0.04"	MS21042L4	5	95307A806	0000
		5/16"-24	3/8"	17/64"	0.52"	0.04"	MS21042L5	1	95307A807	0000
		3/8"-24	7/16"	9/32"	0.62"	0.04"	MS21042L6	1	95307A808	0000


		Cadmium Yellow-Chromate-Plated Steel



				2-56	1/8"	3/32"	0.167"	0.01"	MS21042-02	5	95307A800	0000


				4-40	5/32"	1/8"	0.206"	0.03"	MS21042-04	5	95307A100	0000
				6-32	3/16"	9/64"	0.244"	0.03"	MS21042-06	5	95307A200	0000
				8-32	7/32"	3/16"	0.29"	0.03"	MS21042-08	5	95307A300	0000
				10-32	1/4"	3/16"	0.33"	0.03"	MS21042-3	5	95307A400	0000
				1/4"-28	5/16"	7/32"	0.42"	0.04"	MS21042-4	5	95307A500	0000
				5/16"-24	3/8"	17/64"	0.52"	0.04"	MS21042-5	1	95307A600	0000
				3/8"-24	7/16"	9/32"	0.62"	0.04"	MS21042-6	1	95307A700	0000

Corrosion-Resistant Stainless Steel

High-Temperature A286 Stainless Steel—Stronger than 316 stainless steel and withstand high temperatures up to 1500° F. These nuts resist corrosion from chemicals, such as bleach and chlorine, but they won't hold up to salt water as well as 316 stainless steel.

High-Temperature Silver-Plated A286 Stainless Steel—The silver plating reduces friction during installation, so these nuts thread on smoother than others. They are stronger than 316 stainless steel and withstand temperatures up to 800° F. Nuts resist corrosion from chemicals, such as bleach and chlorine, but won't hold up to salt water as well as 316 stainless steel.

				Flange
	Thread Size	Wd.	Ht.	Dia.	Thk.	Mil. Spec.	Specs. Met	Pkg. Qty.		Pkg.
High-Temperature A286 Stainless Steel



		2-56	1/8"	3/32"	0.167"	0.01"	—	NAS1291C02M	5	98892A800	000000


		4-40	5/32"	1/8"	0.206"	0.01"	—	NAS1291C04M	1	98892A121	0000
		6-32	3/16"	9/64"	0.244"	0.01"	—	NAS1291C06M	1	98892A111	0000
		8-32	7/32"	3/16"	0.29"	0.02"	—	NAS1291C08M	1	98892A122	0000
		10-32	1/4"	3/16"	0.33"	0.02"	—	NAS1291C3M	1	98892A112	0000
		1/4"-28	5/16"	7/32"	0.42"	0.02"	—	NAS1291C4M	1	98892A113	0000
		5/16"-24	3/8"	17/64"	0.52"	0.03"	—	NAS1291C5M	1	98892A123	0000
		3/8"-24	7/16"	9/32"	0.62"	0.03"	—	NAS1291C6M	1	98892A114	0000
		7/16"-20	1/2"	21/64"	0.708"	0.04"	—	NAS1291C7M	1	98892A115	00000
		1/2"-20	9/16"	13/32"	0.814"	0.04"	—	NAS1291C8M	1	98892A116	00000


		High-Temperature Silver-Plated A286 Stainless Steel



				4-40	5/32"	1/8"	0.206"	0.03"	MS21043-04	—	5	98892A100	00000


				6-32	3/16"	9/64"	0.244"	0.03"	MS21043-06	—	5	98892A200	00000
				8-32	7/32"	3/16"	0.29"	0.03"	MS21043-08	—	5	98892A300	00000
				10-32	1/4"	3/16"	0.33"	0.03"	MS21043-3	—	5	98892A400	00000
				1/4"-28	5/16"	7/32"	0.42"	0.04"	MS21043-4	—	5	98892A500	00000
				5/16"-24	3/8"	17/64"	0.52"	0.04"	MS21043-5	—	1	98892A600	0000
				3/8"-24	7/16"	9/32"	0.62"	0.04"	MS21043-6	—	1	98892A700	0000