Zinc Yellow-Chromate Plated Jam Nuts

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74 Products

About Hex Nuts

Choose a hex nut with the right profile, material, and strength for your application.

Thin-Profile Hex Nuts

About half the height of standard-profile nuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against another hex nut to hold it in place.

Medium-Strength Steel

These Grade 5 or Class 04 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-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.

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
Zinc-Yellow-Chromate-Plated Steel



	M4 × 0.7 mm	7	2.2	Class 04	DIN 439B, ISO 4035	—	100	95027A111	00000


	M5 × 0.8 mm	8	2.7	Class 04	DIN 439B, ISO 4035	—	100	95027A112	0000
	M6 × 1 mm	10	3.2	Class 04	DIN 439B, ISO 4035	—	100	95027A113	0000
	M8 × 1 mm	13	4	Class 04	DIN 439B, ISO 8675	Material Certificate	25	93737A111	00000
	M8 × 1.25 mm	13	4	Class 04	DIN 439B, ISO 4035	—	100	95027A114	00000
	M10 × 1.25 mm	17	5	Class 04	DIN 439B, ISO 8675	—	25	93737A112	0000
	M10 × 1.5 mm	17	5	Class 04	DIN 439B, ISO 4035	—	50	95027A115	00000
	M12 × 1.5 mm	19	6	Class 04	DIN 439B, ISO 8675	—	25	93737A113	0000
	M12 × 1.75 mm	19	6	Class 04	DIN 439B, ISO 4035	—	50	95027A116	00000
	M14 × 1.5 mm	22	7	Class 04	DIN 439B, ISO 8675	—	25	93737A114	00000
	M14 × 2 mm	22	7	Class 04	DIN 439B, ISO 4035	—	10	95027A117	0000


	M16 × 1.5 mm	24	8	Class 04	DIN 439B, ISO 8675	—	10	93737A115	0000
	M16 × 2 mm	24	8	Class 04	DIN 439B, ISO 4035	Material Certificate	25	95027A118	00000
	M18 × 1.5 mm	27	9	Class 04	DIN 439B, ISO 8675	Material Certificate	5	93737A116	0000
	M20 × 1.5 mm	30	10	Class 04	DIN 439B, ISO 4035	—	10	93737A117	0000
	M20 × 2.5 mm	30	10	Class 04	DIN 439B, ISO 4035	—	10	95027A119	00000
	M22 × 1.5 mm	32	11	Class 04	DIN 439B, ISO 8675	—	5	93737A118	0000
	M30 × 2 mm	46	15	Class 04	DIN 439B, ISO 8675	—	1	93737A119	0000

High-Strength Steel

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

Material Certificate—Nuts include a report with a traceable lot number and a description of their chemical and physical properties.

	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
Zinc-Yellow-Chromate-Plated Steel



	1/4"-20	7/16"	5/32"	SAE Grade 8	ASME B18.2.2	Material Certificate	100	93839A029	000000


	1/4"-28	7/16"	5/32"	SAE Grade 8	ASME B18.2.2	Material Certificate	100	93839A805	00000
	5/16"-18	1/2"	3/16"	SAE Grade 8	ASME B18.2.2	Material Certificate	50	93839A030	00000
	5/16"-24	1/2"	3/16"	SAE Grade 8	ASME B18.2.2	Material Certificate	50	93839A810	00000
	3/8"-16	9/16"	7/32"	SAE Grade 8	ASME B18.2.2	—	50	93839A031	00000
	3/8"-24	9/16"	7/32"	SAE Grade 8	ASME B18.2.2	—	50	93839A815	00000
	7/16"-14	11/16"	1/4"	SAE Grade 8	ASME B18.2.2	—	25	93839A818	00000
	7/16"-20	11/16"	1/4"	SAE Grade 8	ASME B18.2.2	—	25	93839A820	00000
	1/2"-13	3/4"	5/16"	SAE Grade 8	ASME B18.2.2	—	25	93839A823	00000
	1/2"-20	3/4"	5/16"	SAE Grade 8	ASME B18.2.2	Material Certificate	25	93839A825	00000
	9/16"-12	7/8"	5/16"	SAE Grade 8	ASME B18.2.2	—	10	93839A110	0000


	9/16"-18	7/8"	5/16"	SAE Grade 8	ASME B18.2.2	—	20	93839A830	00000
	5/8"-11	15/16"	3/8"	SAE Grade 8	ASME B18.2.2	Material Certificate	10	93839A832	00000
	5/8"-18	15/16"	3/8"	SAE Grade 8	ASME B18.2.2	—	10	93839A835	00000
	3/4"-10	1 1/8"	27/64"	SAE Grade 8	ASME B18.2.2	—	10	93839A837	00000
	3/4"-16	1 1/8"	27/64"	SAE Grade 8	ASME B18.2.2	Material Certificate	10	93839A840	00000
	7/8"-9	1 5/16"	31/64"	SAE Grade 8	ASME B18.2.2	—	5	93839A843	0000
	7/8"-14	1 5/16"	31/64"	SAE Grade 8	ASME B18.2.2	—	5	93839A845	00000
	1"-8	1 1/2"	35/64"	SAE Grade 8	ASME B18.2.2	Material Certificate	5	93839A852	00000
	1"-14	1 1/2"	35/64"	SAE Grade 8	ASME B18.2.2	Material Certificate	5	93839A855	00000
	1 1/8"-7	1 11/16"	39/64"	SAE Grade 8	ASME B18.2.2	—	1	93839A039	0000


	1 1/8"-12	1 11/16"	39/64"	SAE Grade 8	ASME B18.2.2	—	1	93839A858	0000
	1 1/4"-7	1 7/8"	23/32"	SAE Grade 8	ASME B18.2.2	—	1	93839A040	0000
	1 1/4"-12	1 7/8"	23/32"	SAE Grade 8	ASME B18.2.2	Material Certificate	1	93839A860	0000
	1 3/8"-6	2 1/16"	25/32"	SAE Grade 8	ASME B18.2.2	—	1	93839A660	00000
	1 1/2"-6	2 1/4"	27/32"	SAE Grade 8	ASME B18.2.2	—	1	93839A043	00000
	1 1/2"-12	2 1/4"	27/32"	SAE Grade 8	ASME B18.2.2	Material Certificate	1	93839A865	00000
	1 3/4"-12	2 5/8"	31/32"	SAE Grade 8	ASME B18.2.2	Material Certificate	1	93839A670	00000
	2"-4 1/2	3"	1 3/32"	SAE Grade 8	ASME B18.2.2	Material Certificate	1	93839A120	00000
	2"-12	3"	1 3/32"	SAE Grade 8	ASME B18.2.2	Material Certificate	1	93839A130	00000

Thin-Profile Nylon-Insert Locknuts

About half the height of standard-profile locknuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against a hex nut to hold it in place. The nylon insert grips the screw to prevent loosening from moderate vibration without damaging threads. However, the insert may become brittle if exposed to high temperatures. These locknuts are reusable a handful of times, but the holding power decreases with each use.

High-Strength Steel

Rated Grade 8, Grade C, or Class 10, these locknuts are about 25% stronger than medium-strength steel nuts. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

	Wd.	Ht.	Fastener Strength Grade/Class	Insert Max. Temp., ° F	Pkg. Qty.		Pkg.
Zinc-Yellow-Chromate-Plated Steel



	1/4"-20	7/16"	13/64"	SAE Grade 8	Not Rated	100	94945A205	000000


	1/4"-28	7/16"	13/64"	SAE Grade 8	250	10	94945A139	0000
	5/16"-18	1/2"	1/4"	SAE Grade 8	Not Rated	100	94945A213	00000
	5/16"-24	1/2"	1/4"	SAE Grade 8	250	10	94945A119	00000
	3/8"-16	9/16"	17/64"	SAE Grade 8	Not Rated	100	94945A217	00000
	3/8"-24	9/16"	17/64"	SAE Grade 8	Not Rated	50	94945A218	00000
	7/16"-14	5/8"	5/16"	SAE Grade 8	Not Rated	25	94945A260	00000
	7/16"-20	5/8"	5/16"	SAE Grade 8	Not Rated	25	94945A270	00000
	1/2"-13	3/4"	5/16"	SAE Grade 8	Not Rated	25	94945A224	00000
	1/2"-20	3/4"	5/16"	SAE Grade 8	250	5	94945A121	0000
	5/8"-11	15/16"	25/64"	SAE Grade 8	Not Rated	10	94945A227	0000


	5/8"-18	15/16"	25/64"	SAE Grade 8	250	5	94945A122	0000
	3/4"-16	1 1/16"	13/32"	SAE Grade 8	250	1	94945A123	0000
	7/8"-14	1 1/4"	15/32"	SAE Grade 8	250	1	94945A124	0000
	1"-14	1 7/16"	35/64"	SAE Grade 8	250	1	94945A125	0000
	1 1/4"-12	1 13/16"	3/4"	SAE Grade 8	Not Rated	1	94945A280	00000
	1 1/2"-12	2 3/16"	51/64"	SAE Grade 8	Not Rated	1	94945A290	00000

Extreme-Pressure Steel Threaded Pipe Locknuts

The strongest steel locknuts we offer, these can withstand extreme-pressure applications.

Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.

												For Pipe		For Flange
	Pipe Size	Dash Size	Hex Wd.	Lg.	Gasket Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	For Use With	Temp. Range, ° F	Material	Fabrication	Schedule	Material	Class	Material		Each
NPT Female



		1/8	02	5/8"	3/16"	PTFE	10,000 psi @ 72° F	5,000 psi @ 500° F	Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water	-100 to 500	Zinc-Yellow-Chromate-Plated Steel	Machined	XXH	Steel	1500	Steel	5530K14	000000


		1/4	04	3/4"	9/32"	PTFE	10,000 psi @ 72° F	5,000 psi @ 500° F	Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water	-100 to 500	Zinc-Yellow-Chromate-Plated Steel	Machined	XXH	Steel	1500	Steel	5530K16	00000
		3/8	06	7/8"	9/32"	PTFE	10,000 psi @ 72° F	5,000 psi @ 500° F	Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water	-100 to 500	Zinc-Yellow-Chromate-Plated Steel	Machined	XXH	Steel	1500	Steel	5530K18	00000
		1/2	08	1 1/8"	19/64"	PTFE	10,000 psi @ 72° F	5,000 psi @ 500° F	Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water	-100 to 500	Zinc-Yellow-Chromate-Plated Steel	Machined	XXH	Steel	1500	Steel	5530K19	00000
		3/4	12	1 5/16"	19/64"	PTFE	5,000 psi @ 72° F	5,000 psi @ 500° F	Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water	-100 to 500	Zinc-Yellow-Chromate-Plated Steel	Machined	XXH	Steel	1500	Steel	5530K21	00000
		1	16	1 5/8"	25/64"	PTFE	5,000 psi @ 72° F	5,000 psi @ 500° F	Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water	-100 to 500	Zinc-Yellow-Chromate-Plated Steel	Machined	XXH	Steel	1500	Steel	5530K23	00000
		1 1/4	20	2"	25/64"	PTFE	5,000 psi @ 72° F	5,000 psi @ 500° F	Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water	-100 to 500	Zinc-Yellow-Chromate-Plated Steel	Machined	XXH	Steel	1500	Steel	5530K25	00000
		1 1/2	24	2 1/4"	25/64"	PTFE	3,000 psi @ 72° F	5,000 psi @ 500° F	Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water	-100 to 500	Zinc-Yellow-Chromate-Plated Steel	Machined	XXH	Steel	1500	Steel	5530K27	00000
		2	32	2 3/4"	27/64"	PTFE	3,000 psi @ 72° F	5,000 psi @ 500° F	Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water	-100 to 500	Zinc-Yellow-Chromate-Plated Steel	Machined	XXH	Steel	1500	Steel	5530K29	000000