PartsTable
Technical Data Sheet
Download PDF

AP391D12 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

AP391D12: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include thread_series: UNIFIED NATIONAL JOINT (UNJ), nominal_thread_size: 1.000 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-338-5718, 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
AP391D12
NSN: 5310-01-338-5718
FSC: 5310 — Nuts and Washers
CAGE: 01673 — SPS TECHNOLOGIES, LLC DBA AIRDROME PRECISION COMPONENTS (USA)
SPECIFICATIONS
thread_seriesUNIFIED NATIONAL JOINT (UNJ)
nominal_thread_size1.000 INCHES IN
NSN5310-01-338-5718
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AP391D12 · 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
•
THREAD SERIES: UNIFIED NATIONAL JOINT (UNJ)
•
NOMINAL THREAD SIZE: 1.000 INCHES IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNIFIED NATIONAL JOINT (UNJ)
NOMINAL THREAD SIZE1.000 INCHES IN
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
5310-032-12Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy AP391D12?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is AP391D12?
AP391D12 is a NUT,PLAIN,HEXAGON.
What parts can replace AP391D12?
There is 1 known substitute for AP391D12: 5310-032-12. Substitute compatibility should be verified for your specific system.
What is the NSN for AP391D12?
AP391D12 is cataloged in the U.S. Government catalog under NSN 5310-01-338-5718. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — AP391D12

✓ 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.