MS 51971 Hex Nuts | McMaster-Carr

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	Specifications Met Specifications Met

Mil. Spec.

	Material Material

Stainless Steel

	System of Measurement System of Measurement

Inch

	Thread Size Thread Size

	Thread Type Thread Type

UNC

	Nut Type Nut Type

	Hex

	Hex Nut Profile Hex Nut Profile

	Standard

	Thread Direction Thread Direction

	Right Hand

	Width Width

	Height Height

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
Compliant

	Thread Fit Thread Fit

Class 2B

	Drive Style Drive Style

	External Hex

	Thread Spacing Thread Spacing

Coarse

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

6 Products

About Nuts, Materials, and Finishes

Choose these nuts for their adherence to strict military standards for material and construction. They're passivated for excellent corrosion resistance. Nuts may be mildly magnetic.

For technical drawings and 3-D models, click on a part number.

18-8 Stainless Steel
Thread Size	Wd.	Ht.	Specifications Met	Pkg. Qty.		Pkg.
1/4"-20	7/16"	7/32"	Fed. Spec. FF-N-836, MS51971-1, Fed. Spec. QQ-P-35	10	000000000	00000
5/16"-18	1/2"	17/64"	Fed. Spec. FF-N-836, MS51971-2, Fed. Spec. QQ-P-35	10	000000000	0000
3/8"-16	9/16"	21/64"	Fed. Spec. FF-N-836, MS51971-3, Fed. Spec. QQ-P-35	5	000000000	0000
1/2"-13	3/4"	7/16"	Fed. Spec. FF-N-836, MS51971-5, Fed. Spec. QQ-P-35	1	000000000	0000
5/8"-11	15/16"	35/64"	Fed. Spec. FF-N-836, MS51971-7, Fed. Spec. QQ-P-35	1	000000000	0000
3/4"-10	1 1/8"	41/64"	Fed. Spec. FF-N-836, MS51971-8, Fed. Spec. QQ-P-35	1	000000000	0000

About Nuts, Materials, and Finishes

Mil. Spec. 18-8 Stainless Steel Hex Nuts