0166986 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

0166986: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL OVERALL, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), locking_feature: PREVAILING TORQUE ALL METAL DESIGN, thread_direction: RIGHT-HAND, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-598-7925, 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

0166986

NSN: 5310-01-598-7925
FSC: 5310 — Nuts and Washers
CAGE: 0Y3H3 — FASTENAL COMPANY DBA FASTENAL CO (USA)

SPECIFICATIONS

material	STEEL OVERALL
thread_class	2B
thread_series	UNIFIED NATIONAL COARSE (UNC)
locking_feature	PREVAILING TORQUE ALL METAL DESIGN
thread_direction	RIGHT-HAND
surface_treatment	ZINC OVERALL
nominal_thread_size	0.250 INCHES IN
end_item_identification	MRAP; COUGAR
thread_quantity_per_inch	20
part_name_assigned_by_controlling_agency	1/4IN-20 ZINC FINISH GRADE F FLANGE TOP LOCK NUT IN
NSN	5310-01-598-7925

COMPONENT DIAGRAM

KEY FEATURES

•

THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.250 INCHES IN

•

LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN

•

SURFACE TREATMENT: ZINC OVERALL

•

THREAD CLASS: 2B

TECHNICAL CHARACTERISTICS

THREAD SERIES	UNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.250 INCHES IN
LOCKING FEATURE	PREVAILING TORQUE ALL METAL DESIGN
SURFACE TREATMENT	ZINC OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCY	1/4IN-20 ZINC FINISH GRADE F FLANGE TOP LOCK NUT IN
THREAD CLASS	2B
END ITEM IDENTIFICATION	MRAP; COUGAR
THREAD QUANTITY PER INCH	20
MATERIAL	STEEL OVERALL

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

12759-01180Reference document

Same NSN cross-reference

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

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 0166986?

0166986 is a NUT,SELF-LOCKING,EXTENDED WASHER.

What parts can replace 0166986?

There is 1 known substitute for 0166986: 12759-01180. Substitute compatibility should be verified for your specific system.

What is the NSN for 0166986?

0166986 is cataloged in the U.S. Government catalog under NSN 5310-01-598-7925. This indicates validated use in U.S. government and defense supply chains.

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0166986 — NUT,SELF-LOCKING,EXTENDED WASHER

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