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431323-1 — SEAL,PLAIN

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

431323-1: SEAL,PLAIN.

The SEAL,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, nut_style: KNURLED, nut_diameter: 0.438 INCHES NOMINAL IN, thread_class: 2B, nut_thickness: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-802-2514, 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
431323-1
NSN: 5310-00-802-2514
NIINs: 008022514, 013753110
FSC: 5310 — Nuts and Washers
CAGE: 96214 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
nut_styleKNURLED
nut_diameter0.438 INCHES NOMINAL IN
thread_class2B
nut_thickness0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.138 INCHES IN
thread_quantity_per_inch40
material_document_and_classificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-802-2514
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 431323-1 · 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: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.138 INCHES IN
•
NUT DIAMETER: 0.438 INCHES NOMINAL IN
•
NUT THICKNESS: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
NUT STYLE: KNURLED
TECHNICAL CHARACTERISTICS
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.138 INCHES IN
NUT DIAMETER0.438 INCHES NOMINAL IN
NUT THICKNESS0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLEKNURLED
THREAD CLASS2B
THREAD QUANTITY PER INCH40
SUBSTITUTES & CROSS-REFERENCES 1
G272826Reference 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 431323-1?
431323-1 is a SEAL,PLAIN.
What parts can replace 431323-1?
There is 1 known substitute for 431323-1: G272826. Substitute compatibility should be verified for your specific system.
What is the NSN for 431323-1?
431323-1 is cataloged in the U.S. Government catalog under NSN 5310-00-802-2514. 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.