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398371 — 398371

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

398371: 398371.

The 398371 is a the manufacturer industrial component. Key specifications include overall_width: 0.520 INCHES NOMINAL IN, overall_height: 0.440 INCHES NOMINAL IN, overall_length: 0.903 INCHES NOMINAL IN, end_item_identification: RT662/GRC, part_name_assigned_by_controlling_agency: FSC APPLICATION DATA:RADIO AND TELEVISION @COMMUNICATION EQUIPMENT,EXCEPT AIRBORNE. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-045-1057, 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
MRO→ MRO_GENERAL→ 398371
NSN: 5310-00-045-1057
NIINs: 000451057, 007631486
FSC: 5310 — Nuts and Washers
CAGE: 65282 — WHITE MOTOR CORP (USA)
SPECIFICATIONS
overall_width0.520 INCHES NOMINAL IN
overall_height0.440 INCHES NOMINAL IN
overall_length0.903 INCHES NOMINAL IN
end_item_identificationRT662/GRC
part_name_assigned_by_controlling_agencyFSC APPLICATION DATA:RADIO AND TELEVISION @COMMUNICATION EQUIPMENT,EXCEPT AIRBORNE
NSN5310-00-045-1057
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 398371 · 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
•
WIDTH ACROSS FLATS: 0.500 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
LOCKING FEATURE: FREE-RUNNING ALL METAL DESIGN
•
NUT HEIGHT: 0.187 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM AND ZINC OVERALL
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.500 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
LOCKING FEATUREFREE-RUNNING ALL METAL DESIGN
NUT HEIGHT0.187 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM AND ZINC OVERALL
THREAD CLASS2B
THREAD QUANTITY PER INCH18
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
145025Reference document
Same NSN cross-reference
Reference document — Secondary reference
451057Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 398371?
398371 is a 398371. It is classified as a MRO (MRO_GENERAL).
What parts can replace 398371?
There are 2 known substitutes for 398371: 145025, 451057. Substitute compatibility should be verified for your specific system.
What is the NSN for 398371?
398371 is cataloged in the U.S. Government catalog under NSN 5310-00-045-1057. 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.