1291-N NO.-7 — NUT,PLAIN,HEXAGON

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

1291-N NO.-7: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.812 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-466-7215, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

1291-N NO.-7

NSN: 5310-01-466-7215
FSC: 5310 — Nuts and Washers
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)

SPECIFICATIONS

material	NICKEL ALLOY OVERALL
nut_style	HEXAGON
nut_height	0.812 INCHES NOMINAL IN
thread_class	2B
thread_series	UNIFIED NATIONAL COARSE (UNC)
thread_direction	RIGHT-HAND
width_across_flats	2.250 INCHES NOMINAL IN
nominal_thread_size	1.375 INCHES IN
bearing_surface_type	CHAMFERED
thread_pitch_diameters	+1.2938 TO 1.3031 INCHES IN
thread_tolerance_class	5H INTERNAL
thread_quantity_per_inch	8
NSN	5310-01-466-7215

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 2.250 INCHES NOMINAL IN

•

THREAD TOLERANCE CLASS: 5H INTERNAL

•

THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)

•

THREAD PITCH DIAMETERS: +1.2938 TO 1.3031 INCHES IN

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 1.375 INCHES IN

•

NUT HEIGHT: 0.812 INCHES NOMINAL IN

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	2.250 INCHES NOMINAL IN
THREAD TOLERANCE CLASS	5H INTERNAL
THREAD SERIES	UNIFIED NATIONAL COARSE (UNC)
THREAD PITCH DIAMETERS	+1.2938 TO 1.3031 INCHES IN
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	1.375 INCHES IN
NUT HEIGHT	0.812 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCY	NAVY SPECIAL PROJECT
NUT STYLE	HEXAGON
THREAD CLASS	2B

OTHER ITEMS IN FSC 5310 — Nuts and Washers

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540

SUBSTITUTES & CROSS-REFERENCES 1

31147-U-380Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 1291-N NO.-7?

1291-N NO.-7 is a NUT,PLAIN,HEXAGON.

What parts can replace 1291-N NO.-7?

There is 1 known substitute for 1291-N NO.-7: 31147-U-380. Substitute compatibility should be verified for your specific system.

What is the NSN for 1291-N NO.-7?

1291-N NO.-7 is cataloged in the U.S. Government catalog under NSN 5310-01-466-7215. This indicates validated use in U.S. government and defense supply chains.

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