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Technical Data Sheet
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412-321 — NUT BLANK

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

412-321: NUT BLANK.

The NUT BLANK is a the manufacturer industrial component. Key specifications include end_item_identification: VOLTMETER; V-22 HELICOPTER, part_name_assigned_by_controlling_agency: NUT,AIRCRAFT,MATERIAL. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-529-4138, 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
412-321
NSN: 5340-00-529-4138
NIINs: 005294138, 015359367
FSC: 5340 — Hardware, Commercial
CAGE: 65282 — WHITE MOTOR CORP (USA)
SPECIFICATIONS
end_item_identificationVOLTMETER; V-22 HELICOPTER
part_name_assigned_by_controlling_agencyNUT,AIRCRAFT,MATERIAL
NSN5340-00-529-4138
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 412-321 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
INTEGRAL NUT TYPE AND QUANTITY: 1 PLAIN EQUAL LENGTH TONGUES
•
LOOP INSIDE DIAMETER: 9.120 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL WIDTH0.840 INCHES NOMINAL IN
INTEGRAL NUT TYPE AND QUANTITY1 PLAIN EQUAL LENGTH TONGUES
LOOP INSIDE DIAMETER9.120 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 6
1539H2Reference document
Same NSN cross-reference
Reference document — Secondary reference
7539079Reference document
Same NSN cross-reference
Reference document — Secondary reference
437916Reference document
Same NSN cross-reference
Reference document — Secondary reference
P6834Reference document
Same NSN cross-reference
Reference document — Secondary reference
5294138Reference document
Same NSN cross-reference
Reference document — Secondary reference
P5483Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 412-321?
412-321 is a NUT BLANK.
What parts can replace 412-321?
There are 6 known substitutes for 412-321: 1539H2, 7539079, 437916 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 412-321?
412-321 is cataloged in the U.S. Government catalog under NSN 5340-00-529-4138. 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.