E12509-4 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

E12509-4: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL OVERALL EXCEPT INSERT, lubrication: DRY FILM LUBRICANT, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), locking_feature: PREVAILING TORQUE WITH NONMETALLIC INSERT, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-146-0176, 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

E12509-4

NSN: 5310-01-146-0176
FSC: 5310 — Nuts and Washers
CAGE: 019L2 — ESNA, LLC (USA)

SPECIFICATIONS

material	STEEL OVERALL EXCEPT INSERT
lubrication	DRY FILM LUBRICANT
thread_class	3B
thread_series	UNIFIED NATIONAL JOINT FINE (UNJF)
locking_feature	PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_direction	RIGHT-HAND
nominal_thread_size	0.250 INCHES IN
counterbore_diameter	0.294 INCHES MINIMUM AND 0.309 INCHES MAXIMUM FIRST END IN
nut_counterbore_depth	0.165 INCHES MINIMUM AND 0.185 INCHES MAXIMUM FIRST END IN
thread_quantity_per_inch	28
NSN	5310-01-146-0176

COMPONENT DIAGRAM

KEY FEATURES

•

LUBRICATION: DRY FILM LUBRICANT

•

THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)

•

NUT COUNTERBORE DEPTH: 0.165 INCHES MINIMUM AND 0.185 INCHES MAXIMUM FIRST END IN

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.250 INCHES IN

•

COUNTERBORE DIAMETER: 0.294 INCHES MINIMUM AND 0.309 INCHES MAXIMUM FIRST END IN

•

LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT

•

THREAD CLASS: 3B

TECHNICAL CHARACTERISTICS

LUBRICATION	DRY FILM LUBRICANT
THREAD SERIES	UNIFIED NATIONAL JOINT FINE (UNJF)
NUT COUNTERBORE DEPTH	0.165 INCHES MINIMUM AND 0.185 INCHES MAXIMUM FIRST END IN
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.250 INCHES IN
COUNTERBORE DIAMETER	0.294 INCHES MINIMUM AND 0.309 INCHES MAXIMUM FIRST END IN
LOCKING FEATURE	PREVAILING TORQUE WITH NONMETALLIC INSERT
THREAD CLASS	3B
THREAD QUANTITY PER INCH	28
MATERIAL	STEEL OVERALL EXCEPT INSERT

SUBSTITUTES & CROSS-REFERENCES 4

10109807Reference document

Same NSN cross-reference

Reference document — Informative reference only

5310PL2178774Reference document

Same NSN cross-reference

Reference document — Informative reference only

H6G90Z-4Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

5033T30P04Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is E12509-4?

E12509-4 is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace E12509-4?

There are 4 known substitutes for E12509-4: 10109807, 5310PL2178774, H6G90Z-4 and 1 more. Substitute compatibility should be verified for your specific system.

What is the NSN for E12509-4?

E12509-4 is cataloged in the U.S. Government catalog under NSN 5310-01-146-0176. This indicates validated use in U.S. government and defense supply chains.

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E12509-4 — NUT,SELF-LOCKING,EXTENDED WASHER

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