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387373 — NUT,PLAIN,EXTENDED WASHER,HEXAGO

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

387373: NUT,PLAIN,EXTENDED WASHER,HEXAGO.

NUT,PLAIN,EXTENDED WASHER,HEXAGO. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: HEXAGON, thread_series: UNS, overall_height: 1.010 INCHES NOMINAL IN, special_features: DRILLED HOLES FOR LOCK WIRE, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-797-3094, 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
387373
NSN: 5310-00-797-3094
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleHEXAGON
thread_seriesUNS
overall_height1.010 INCHES NOMINAL IN
special_featuresDRILLED HOLES FOR LOCK WIRE
thread_directionRIGHT-HAND
washer_thickness0.140 INCHES NOMINAL IN
width_across_flats0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
nominal_thread_size0.6875 INCHES IN
thread_pitch_diameters+0.6514 TO 0.6558 INCHES IN
washer_outside_diameter1.310 INCHES NOMINAL IN
thread_quantity_per_inch18
NSN5310-00-797-3094
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 387373 · 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: 1.310 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
•
THREAD SERIES: UNS
•
THREAD PITCH DIAMETERS: +0.6514 TO 0.6558 INCHES IN
•
WASHER THICKNESS: 0.140 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.010 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER1.310 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN
THREAD SERIESUNS
THREAD PITCH DIAMETERS+0.6514 TO 0.6558 INCHES IN
WASHER THICKNESS0.140 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.6875 INCHES IN
SPECIAL FEATURESDRILLED HOLES FOR LOCK WIRE
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

No substitute or cross-reference records for this part.

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 387373?
387373 is a NUT,PLAIN,EXTENDED WASHER,HEXAGO.
What is the NSN for 387373?
387373 is cataloged in the U.S. Government catalog under NSN 5310-00-797-3094. 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.