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AP391D08H — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AP391D08H: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, nut_style: HEXAGON, nut_height: 0.242 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNJS, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-338-9435, 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
AP391D08H
NSN: 5310-01-338-9435
FSC: 5310 — Nuts and Washers
CAGE: 01673 — SPS TECHNOLOGIES, LLC DBA AIRDROME PRECISION COMPONENTS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
nut_styleHEXAGON
nut_height0.242 INCHES NOMINAL IN
thread_class3B
thread_seriesUNJS
thread_directionRIGHT-HAND
surface_treatmentANODIZE OVERALL
width_across_flats1.000 INCHES NOMINAL IN
nominal_thread_size0.719 INCHES IN
thread_quantity_per_inch20
material_document_and_classificationAMS4120 ASSN STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC ALL TREATMENT RESPONSES OVERALL
NSN5310-01-338-9435
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AP391D08H · 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: 1.000 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC ALL TREATMENT RESPONSES OVERALL
•
THREAD SERIES: UNJS
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS4120 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.719 INCHES IN
•
NUT HEIGHT: 0.242 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.000 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC ALL TREATMENT RESPONSES OVERALL
THREAD SERIESUNJS
MATERIAL DOCUMENT AND CLASSIFICATIONAMS4120 ASSN STD ALL MATERIAL RESPONSES OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.719 INCHES IN
NUT HEIGHT0.242 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE OVERALL
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 1
5310-032-08LReference 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 AP391D08H?
AP391D08H is a NUT,PLAIN,HEXAGON.
What parts can replace AP391D08H?
There is 1 known substitute for AP391D08H: 5310-032-08L. Substitute compatibility should be verified for your specific system.
What is the NSN for AP391D08H?
AP391D08H is cataloged in the U.S. Government catalog under NSN 5310-01-338-9435. 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.