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F2E9C — NUT,PLAIN,EXTENDED WASHER,HEXAGO

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

F2E9C: NUT,PLAIN,EXTENDED WASHER,HEXAGO.

NUT,PLAIN,EXTENDED WASHER,HEXAGO. Key specifications include material: COPPER ALLOY OVERALL, thread_class: 3B, thread_series: UNF, overall_height: 0.938 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, washer_thickness: 0.125 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-386-9557, 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
F2E9C
NSN: 5310-00-386-9557
FSC: 5310 — Nuts and Washers
CAGE: 7PZX0 — FAIRBANKS MORSE, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
thread_class3B
thread_seriesUNF
overall_height0.938 INCHES NOMINAL IN
thread_directionRIGHT-HAND
washer_thickness0.125 INCHES NOMINAL IN
width_across_flats0.625 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES IN
washer_outside_diameter1.062 INCHES NOMINAL IN
thread_quantity_per_inch24
NSN5310-00-386-9557
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: F2E9C · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WASHER OUTSIDE DIAMETER: 1.062 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.625 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
WASHER THICKNESS: 0.125 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
THREAD CLASS: 3B
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.938 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER1.062 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
THREAD SERIESUNF
WASHER THICKNESS0.125 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
THREAD CLASS3B
THREAD QUANTITY PER INCH24
MATERIALCOPPER ALLOY 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 4
55F1 1-4E30APC12Reference document
Same NSN cross-reference
Reference document — Secondary reference
381-4105-521062ALT4PC12Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
55F1 1-4E30DPC12Reference document
Same NSN cross-reference
Reference document — Secondary reference
381-4105-521055ALT4PC12Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is F2E9C?
F2E9C is a NUT,PLAIN,EXTENDED WASHER,HEXAGO.
What parts can replace F2E9C?
There are 4 known substitutes for F2E9C: 55F1 1-4E30APC12, 381-4105-521062ALT4PC12, 55F1 1-4E30DPC12 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for F2E9C?
F2E9C is cataloged in the U.S. Government catalog under NSN 5310-00-386-9557. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.