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AP391T04H — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AP391T04H: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY UNS R56400 OVERALL, nut_style: HEXAGON, nut_height: 0.210 INCHES NOMINAL IN, lubrication: DRY FILM LUBRICANT, thread_class: 3B, thread_series: UNJS. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-351-9400, 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
AP391T04H
NSN: 5310-01-351-9400
FSC: 5310 — Nuts and Washers
CAGE: 01673 — SPS TECHNOLOGIES, LLC DBA AIRDROME PRECISION COMPONENTS (USA)
SPECIFICATIONS
materialTITANIUM ALLOY UNS R56400 OVERALL
nut_styleHEXAGON
nut_height0.210 INCHES NOMINAL IN
lubricationDRY FILM LUBRICANT
thread_class3B
thread_seriesUNJS
special_featuresTWO HOLES EQUALLY SPACED APART DIAMTER OF HOLES 0.070 NOM
thread_directionRIGHT-HAND
width_across_flats0.688 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch24
NSN5310-01-351-9400
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AP391T04H · 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
•
LUBRICATION: DRY FILM LUBRICANT
•
WIDTH ACROSS FLATS: 0.688 INCHES NOMINAL IN
•
THREAD SERIES: UNJS
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 4965 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
NUT HEIGHT: 0.210 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LUBRICATIONDRY FILM LUBRICANT
WIDTH ACROSS FLATS0.688 INCHES NOMINAL IN
THREAD SERIESUNJS
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 4965 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.438 INCHES IN
NUT HEIGHT0.210 INCHES NOMINAL IN
SPECIAL FEATURESTWO HOLES EQUALLY SPACED APART DIAMTER OF HOLES 0.070 NOM
NUT STYLEHEXAGON
THREAD CLASS3B
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 AP391T04H?
AP391T04H is a NUT,PLAIN,HEXAGON.
What is the NSN for AP391T04H?
AP391T04H is cataloged in the U.S. Government catalog under NSN 5310-01-351-9400. 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.