LK-440-1EF — NUT,SELF-LOCKING,CLINCH

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

LK-440-1EF: NUT,SELF-LOCKING,CLINCH.

The NUT,SELF-LOCKING,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CLINCH, nut_height: 0.173 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC), pilot_diameter: 0.185 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-883-2928, 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

LK-440-1EF

NSN: 5310-00-883-2928
FSC: 5310 — Nuts and Washers
CAGE: 46384 — PENN ENGINEERING & MANUFACTURING CORP (USA)

SPECIFICATIONS

material	STEEL OVERALL
nut_style	CLINCH
nut_height	0.173 INCHES NOMINAL IN
thread_class	3B
thread_series	UNIFIED NATIONAL COARSE (UNC)
pilot_diameter	0.185 INCHES MAXIMUM IN
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM AND CHROMATE OVERALL
width_across_flats	0.250 INCHES NOMINAL IN
nominal_thread_size	0.112 INCHES IN
thread_quantity_per_inch	40
NSN	5310-00-883-2928

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL IN

•

THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.112 INCHES IN

•

PILOT DIAMETER: 0.185 INCHES MAXIMUM IN

•

LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN

•

NUT HEIGHT: 0.173 INCHES NOMINAL IN

•

SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL

TECHNICAL CHARACTERISTICS

WIDTH ACROSS FLATS	0.250 INCHES NOMINAL IN
THREAD SERIES	UNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.112 INCHES IN
PILOT DIAMETER	0.185 INCHES MAXIMUM IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT	0.173 INCHES NOMINAL IN
SURFACE TREATMENT	CADMIUM AND CHROMATE OVERALL
NUT STYLE	CLINCH
THREAD CLASS	3B

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 3

5310-012-0001Reference document

Same NSN cross-reference

Reference document — Secondary reference

LK440-1Reference document

Same NSN cross-reference

Reference document — Secondary reference

P9881-5Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 LK-440-1EF?

LK-440-1EF is a NUT,SELF-LOCKING,CLINCH.

What parts can replace LK-440-1EF?

There are 3 known substitutes for LK-440-1EF: 5310-012-0001, LK440-1, P9881-5. Substitute compatibility should be verified for your specific system.

What is the NSN for LK-440-1EF?

LK-440-1EF is cataloged in the U.S. Government catalog under NSN 5310-00-883-2928. This indicates validated use in U.S. government and defense supply chains.

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