110166987 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

110166987: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thread_class: 2A A, thread_series: UNIFIED NATIONAL COARSE (UNC), overall_height: 0.370 INCHES NOMINAL IN, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-662-4413, 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

110166987

NSN: 5310-01-662-4413
FSC: 5310 — Nuts and Washers
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)

SPECIFICATIONS

material	STEEL OVERALL
nut_style	HEXAGON
thread_class	2A A
thread_series	UNIFIED NATIONAL COARSE (UNC)
overall_height	0.370 INCHES NOMINAL IN
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
special_features	LOCKING FEATURE IS DEFORMED THREADS
thread_direction	RIGHT-HAND
width_across_flats	0.500 INCHES NOMINAL IN
nominal_thread_size	0.3125 INCHES IN
end_item_identification	4210-01-622-0440
washer_outside_diameter	0.680 INCHES NOMINAL IN
NSN	5310-01-662-4413

COMPONENT DIAGRAM

KEY FEATURES

•

WASHER OUTSIDE DIAMETER: 0.680 INCHES NOMINAL IN

•

WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: WSD--21+10-B3 MFR REF SINGLE TREATMENT RESPONSE OVERALL

•

THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)

•

MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.3125 INCHES IN

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	0.370 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER	0.680 INCHES NOMINAL IN
WIDTH ACROSS FLATS	0.500 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	WSD--21+10-B3 MFR REF SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES	UNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATION	SAE J429 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.3125 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
SPECIAL FEATURES	LOCKING FEATURE IS DEFORMED THREADS

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

4220722Same 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 110166987?

110166987 is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace 110166987?

There is 1 known substitute for 110166987: 4220722. Substitute compatibility should be verified for your specific system.

What is the NSN for 110166987?

110166987 is cataloged in the U.S. Government catalog under NSN 5310-01-662-4413. This indicates validated use in U.S. government and defense supply chains.

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110166987 — NUT,SELF-LOCKING,EXTENDED WASHER

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