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4373399 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4373399: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL NUT, nut_style: HEXAGON, special_features: OUTSIDE DIAMETER 16.5 MILLIMETERS MM, thread_direction: RIGHT-HAND, width_across_flats: 12.0 MILLIMETERS NOMINAL MM, nominal_thread_size: 8.0 MILLIMETERS MM. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-678-6215, 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
4373399
NSN: 5310-01-678-6215
FSC: 5310 — Nuts and Washers
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL NUT
nut_styleHEXAGON
thread_seriesM
special_featuresOUTSIDE DIAMETER 16.5 MILLIMETERS MM
thread_directionRIGHT-HAND
width_across_flats12.0 MILLIMETERS NOMINAL MM
nominal_thread_size8.0 MILLIMETERS MM
end_item_identificationNSN 2320-016525208
thread_pitch_in_millimeters1.25
NSN5310-01-678-6215
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4373399 · 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: 12.0 MILLIMETERS NOMINAL MM
•
THREAD SERIES: M
•
THREAD PITCH IN MILLIMETERS: 1.25
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 8.0 MILLIMETERS MM
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS12.0 MILLIMETERS NOMINAL MM
THREAD SERIESM
THREAD PITCH IN MILLIMETERS1.25
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE8.0 MILLIMETERS MM
SPECIAL FEATURESOUTSIDE DIAMETER 16.5 MILLIMETERS MM
NUT STYLEHEXAGON
END ITEM IDENTIFICATIONNSN 2320-016525208
MATERIALSTEEL NUT
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 4373399?
4373399 is a NUT,PLAIN,HEXAGON.
What is the NSN for 4373399?
4373399 is cataloged in the U.S. Government catalog under NSN 5310-01-678-6215. 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.