Mil. Spec. Thin Hex Nuts

Filter by

Hex Nut Profile

Thread Size

Material

Nut Type

Military Specification

Fed. Spec. FF-N-836

Military Specification

Height

Thread Type

Locking Type

DFARS Specialty Metals

Width

Thread Fit

Unified Standard Class 2B

Unified Standard Class 3B

Finish

Cadmium Yellow-Chromate Plated

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

Yes

Performance

Corrosion Resistant

Vibration Resistant

Export Control Classification Number (ECCN)

RoHS

Thread Spacing

REACH

Fastener Strength Rating

Low

Forward

How can we improve?

29 Products

Mil. Spec. Thin-Profile Nylon-Insert Locknuts

These locknuts are manufactured and tested to strict U.S. military standards for material and construction. They are about half the height of standard-profile locknuts to 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.

Low-Strength Steel

Rated Grade 2, Class 6, or lower, these locknuts are about half as strong as medium-strength steel nuts. Use them with screws that have a similar strength rating to avoid stripping threads during installation.

Cadmium Yellow-Chromate-Plated Steel—These locknuts have good lubricity to thread on smoothly and ease installation. The plating also creates a barrier against rust that's comparable to zinc-yellow-chromate plating.

	Wd.	Ht.	Mil. Spec.	Insert Max. Temp., ° F	Pkg. Qty.		Pkg.
Cadmium Yellow-Chromate-Plated Steel



	4-40	1/4"	1/8"	MS21083N04, NASM21083	250	10	95496A310	000000


	6-32	5/16"	9/64"	MS21083N06, NASM21083	250	10	95496A320	00000
	8-32	11/32"	3/16"	MS21083N08, NASM21083	250	10	95496A330	0000
	10-32	3/8"	3/16"	MS21083N3, NASM21083	250	10	95496A340	0000
	1/4"-28	7/16"	7/32"	MS21083N4, NASM21083	250	10	95496A350	0000
	1/2"-20	3/4"	5/16"	MS21083N8, NASM21083	250	1	95496A380	0000

Corrosion-Resistant Stainless Steel

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

	Wd.	Ht.	Mil. Spec.	Insert Max. Temp., ° F	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	2-56	1/4"	7/64"	MS21083C02, NASM21083	250	5	97231A480	000000


	4-40	1/4"	1/8"	MS21083C04, NASM21083	250	10	97231A410	00000
	6-32	5/16"	9/64"	MS21083C06, NASM21083	250	10	97231A420	00000
	8-32	11/32"	3/16"	MS21083C08, NASM21083	250	5	97231A430	0000
	10-32	3/8"	3/16"	MS21083C3, NASM21083	250	5	97231A440	00000
	1/4"-28	7/16"	7/32"	MS21083C4, NASM21083	250	5	97231A450	00000
	5/16"-24	1/2"	17/64"	MS21083C5, NASM21083	250	1	97231A460	0000
	3/8"-24	9/16"	9/32"	MS21083C6, NASM21083	250	1	97231A470	0000
	7/16"-20	11/16"	21/64"	MS21083C7, NASM21083	250	1	97231A510	00000
	1/2"-20	3/4"	5/16"	MS21083C8, NASM21083	250	1	97231A490	00000
	5/8"-18	15/16"	13/32"	MS21083C10, NASM21083	250	1	97231A520	00000

Mil. Spec. Thin-Profile Hex Nuts

These nuts are manufactured and tested to strict U.S. military standards for material and construction. About half the height of standard-profile nuts, they 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.

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.

	Wd.	Ht.	Mil. Spec.	Certificate Type	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	1/4"-20	7/16"	5/32"	Fed. Spec. FF-N-836, MS35691-3	—	5	92101A210	000000


	1/4"-28	7/16"	5/32"	Fed. Spec. FF-N-836, MS35691-7	—	1	92101A320	0000
	5/16"-18	1/2"	3/16"	Fed. Spec. FF-N-836, MS35691-11	Material Certificate	5	92101A430	00000
	5/16"-24	1/2"	3/16"	Fed. Spec. FF-N-836, MS35691-15	—	5	92101A540	00000
	3/8"-16	9/16"	7/32"	Fed. Spec. FF-N-836, MS35691-19	—	1	92101A650	0000
	3/8"-24	9/16"	7/32"	Fed. Spec. FF-N-836, MS35691-23	—	1	92101A760	0000
	7/16"-14	11/16"	1/4"	Fed. Spec. FF-N-836, MS35691-27	Material Certificate	1	92101A101	00000
	7/16"-20	11/16"	1/4"	Fed. Spec. FF-N-836, MS35691-31	—	1	92101A102	0000
	1/2"-13	3/4"	5/16"	Fed. Spec. FF-N-836, MS35691-35	Material Certificate	1	92101A870	0000
	1/2"-20	3/4"	5/16"	Fed. Spec. FF-N-836, MS35691-39	Material Certificate	1	92101A980	0000
	5/8"-11	15/16"	3/8"	Fed. Spec. FF-N-836, MS35691-51	—	1	92101A103	00000


	5/8"-18	15/16"	3/8"	Fed. Spec. FF-N-836, MS35691-55	—	1	92101A104	00000