F1801-040 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

F1801-040: NUT,SELF-LOCKING,HEXAGON.

The NUT,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1137 OVERALL, nut_style: HEXAGON, nut_height: 0.313 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN, temp_rating: 550.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the U.S.

Government catalog under NSN 5310-00-680-6874, 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

F1801-040

NSN: 5310-00-680-6874
FSC: 5310 — Nuts and Washers
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)

SPECIFICATIONS

material	STEEL COMP 1137 OVERALL
nut_style	HEXAGON
nut_height	0.313 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
temp_rating	550.0 FAHRENHEIT NOMINAL DEGF
thread_class	3B
thread_series	UNIFIED NATIONAL COARSE (UNC)
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM OVERALL
width_across_flats	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_size	0.250 INCHES IN
bearing_surface_type	CHAMFERED
NSN	5310-00-680-6874

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN

•

BEARING SURFACE FINISH: 125.0 MICROINCHES

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)

•

TEMP RATING: 550.0 FAHRENHEIT NOMINAL DEGF

•

MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5024 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.250 INCHES IN

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
BEARING SURFACE FINISH	125.0 MICROINCHES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES	UNIFIED NATIONAL COARSE (UNC)
TEMP RATING	550.0 FAHRENHEIT NOMINAL DEGF
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5024 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.250 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT	0.313 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN

SUBSTITUTES & CROSS-REFERENCES 3

F1801-40Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

71-4926Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

1801-040Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

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

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FREQUENTLY ASKED QUESTIONS

What is F1801-040?

F1801-040 is a NUT,SELF-LOCKING,HEXAGON.

What parts can replace F1801-040?

There are 3 known substitutes for F1801-040: F1801-40, 71-4926, 1801-040. Substitute compatibility should be verified for your specific system.

What is the NSN for F1801-040?

F1801-040 is cataloged in the U.S. Government catalog under NSN 5310-00-680-6874. This indicates validated use in U.S. government and defense supply chains.

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