PartsTable
Technical Data Sheet

D38999/28-1K — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

D38999/28-1K: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include end_item_identification: T406-AD-400 ENGINE, criticality_code_justification: AGAV. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-473-6630, 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
D38999/28-1K
NSN: 5310-01-473-6630
FSC: 5310 — Nuts and Washers
CAGE: 06324 — GLENAIR, INC. (USA)
SPECIFICATIONS
end_item_identificationT406-AD-400 ENGINE
criticality_code_justificationAGAV
NSN5310-01-473-6630
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: D38999/28-1K · 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
•
CRITICALITY CODE JUSTIFICATION: AGAV
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONAGAV
END ITEM IDENTIFICATIONT406-AD-400 ENGINE
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 2
NSN SPECIFIC V-22 AE1107C ENGINEReference document
Same NSN cross-reference
Reference document — Secondary reference
GLENAIR 2ND SOURCE FOR MQ25A ENGReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is D38999/28-1K?
D38999/28-1K is a NUT,PLAIN,ROUND.
What parts can replace D38999/28-1K?
There are 2 known substitutes for D38999/28-1K: NSN SPECIFIC V-22 AE1107C ENGINE, GLENAIR 2ND SOURCE FOR MQ25A ENG. Substitute compatibility should be verified for your specific system.
What is the NSN for D38999/28-1K?
D38999/28-1K is cataloged in the U.S. Government catalog under NSN 5310-01-473-6630. 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.