Zinc Yellow-Chromate Plated Jam Nuts

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65 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	Pkg. Qty.		Pkg.
Zinc-Yellow-Chromate-Plated Steel



	M4 × 0.7 mm	7	2.2	ISO Class 04	DIN 439B, ISO 4035	100	000000000	00000


	M5 × 0.8 mm	8	2.7	ISO Class 04	DIN 439B, ISO 4035	100	000000000	0000
	M6 × 1 mm	10	3.2	ISO Class 04	DIN 439B, ISO 4035	100	000000000	0000
	M8 × 1 mm	13	4	ISO Class 04	DIN 439B, ISO 4035	25	000000000	00000
	M8 × 1.25 mm	13	4	ISO Class 04	DIN 439B, ISO 4035	100	000000000	00000
	M10 × 1.25 mm	17	5	ISO Class 04	DIN 439B, ISO 4035	25	000000000	0000
	M10 × 1.5 mm	17	5	ISO Class 04	DIN 439B, ISO 4035	50	000000000	00000
	M12 × 1.5 mm	19	6	ISO Class 04	DIN 439B, ISO 4035	25	000000000	0000
	M12 × 1.75 mm	19	6	ISO Class 04	DIN 439B, ISO 4035	50	000000000	00000
	M14 × 1.5 mm	22	7	ISO Class 04	DIN 439B, ISO 4035	25	000000000	0000
	M14 × 2 mm	22	7	ISO Class 04	DIN 439B, ISO 4035	10	000000000	0000


	M16 × 1.5 mm	24	8	ISO Class 04	DIN 439B, ISO 4035	10	000000000	0000
	M16 × 2 mm	24	8	ISO Class 04	DIN 439B, ISO 4035	25	000000000	00000
	M18 × 1.5 mm	27	9	ISO Class 04	DIN 439B, ISO 4035	5	000000000	0000
	M20 × 1.5 mm	30	10	ISO Class 04	DIN 439B, ISO 4035	10	000000000	0000
	M20 × 2.5 mm	30	10	ISO Class 04	DIN 439B, ISO 4035	10	000000000	00000
	M22 × 1.5 mm	32	11	ISO Class 04	DIN 439B, ISO 4035	5	000000000	0000
	M30 × 2 mm	46	15	ISO Class 04	DIN 439B, ISO 4035	1	000000000	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.

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



	1/4"-20	7/16"	5/32"	SAE Grade 8	ASME B18.2.2	100	000000000	000000


	1/4"-28	7/16"	5/32"	SAE Grade 8	ASME B18.2.2	100	000000000	00000
	5/16"-18	1/2"	3/16"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
	5/16"-24	1/2"	3/16"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
	3/8"-16	9/16"	7/32"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
	3/8"-24	9/16"	7/32"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
	7/16"-14	11/16"	1/4"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
	7/16"-20	11/16"	1/4"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
	1/2"-13	3/4"	5/16"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
	1/2"-20	3/4"	5/16"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
	9/16"-12	7/8"	5/16"	SAE Grade 8	ASME B18.2.2	10	000000000	0000


	9/16"-18	7/8"	5/16"	SAE Grade 8	ASME B18.2.2	20	000000000	00000
	5/8"-11	15/16"	3/8"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
	5/8"-18	15/16"	3/8"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
	3/4"-10	1 1/8"	27/64"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
	3/4"-16	1 1/8"	27/64"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
	7/8"-9	1 5/16"	31/64"	SAE Grade 8	ASME B18.2.2	5	000000000	0000
	7/8"-14	1 5/16"	31/64"	SAE Grade 8	ASME B18.2.2	5	000000000	00000
	1"-8	1 1/2"	35/64"	SAE Grade 8	ASME B18.2.2	5	000000000	00000
	1"-14	1 1/2"	35/64"	SAE Grade 8	ASME B18.2.2	5	000000000	00000
	1 1/8"-7	1 11/16"	39/64"	SAE Grade 8	ASME B18.2.2	1	000000000	0000


	1 1/8"-12	1 11/16"	39/64"	SAE Grade 8	ASME B18.2.2	1	000000000	0000
	1 1/4"-7	1 7/8"	23/32"	SAE Grade 8	ASME B18.2.2	1	000000000	0000
	1 1/4"-12	1 7/8"	23/32"	SAE Grade 8	ASME B18.2.2	1	000000000	0000
	1 3/8"-6	2 1/16"	25/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
	1 1/2"-6	2 1/4"	27/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
	1 1/2"-12	2 1/4"	27/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
	1 3/4"-12	2 5/8"	31/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
	2"-4 1/2	3"	1 3/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
	2"-12	3"	1 3/32"	SAE Grade 8	ASME B18.2.2	1	000000000	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	000000000	00000


	1/4"-28	7/16"	13/64"	SAE Grade 8	250	10	000000000	0000
	5/16"-18	1/2"	1/4"	SAE Grade 8	Not Rated	100	000000000	00000
	5/16"-24	1/2"	1/4"	SAE Grade 8	250	10	000000000	00000
	3/8"-16	9/16"	17/64"	SAE Grade 8	Not Rated	100	000000000	00000
	3/8"-24	9/16"	17/64"	SAE Grade 8	Not Rated	50	000000000	00000
	7/16"-14	5/8"	5/16"	SAE Grade 8	Not Rated	25	000000000	0000
	7/16"-20	5/8"	5/16"	SAE Grade 8	Not Rated	25	000000000	0000
	1/2"-13	3/4"	5/16"	SAE Grade 8	Not Rated	25	000000000	00000
	1/2"-20	3/4"	5/16"	SAE Grade 8	250	5	000000000	0000
	5/8"-11	15/16"	25/64"	SAE Grade 8	Not Rated	10	000000000	0000


	5/8"-18	15/16"	25/64"	SAE Grade 8	250	5	000000000	0000
	3/4"-16	1 1/16"	13/32"	SAE Grade 8	250	1	000000000	0000
	7/8"-14	1 1/4"	15/32"	SAE Grade 8	250	1	000000000	0000
	1"-14	1 7/16"	35/64"	SAE Grade 8	250	1	000000000	0000
	1 1/4"-12	1 13/16"	3/4"	SAE Grade 8	Not Rated	1	000000000	00000
	1 1/2"-12	2 3/16"	51/64"	SAE Grade 8	Not Rated	1	000000000	00000