PartsTable
Technical Data Sheet
Download PDF

2643993 — NUT,PLAIN,CASTELLATED,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2643993: NUT,PLAIN,CASTELLATED,HEXAGON.

The NUT,PLAIN,CASTELLATED,HEXAGON is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: OIL SEAL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-194-7149, 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
2643993
NSN: 5310-00-194-7149
NIINs: 001947149, 014627741
FSC: 5310 — Nuts and Washers
CAGE: 06848 — HONEYWELL INTERNATIONAL INC DIV AEROSPACE-SOUTH BEND (BENDIX DR) (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyOIL SEAL
NSN5310-00-194-7149
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2643993 · 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: 0.6750 INCHES MINIMUM AND 0.6875 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.3125 INCHES IN
•
NUT HEIGHT: 0.410 INCHES NOMINAL IN
•
THREAD CLASS: 3B
•
THREAD QUANTITY PER INCH: 24
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.6750 INCHES MINIMUM AND 0.6875 INCHES MAXIMUM IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.3125 INCHES IN
NUT HEIGHT0.410 INCHES NOMINAL IN
THREAD CLASS3B
THREAD QUANTITY PER INCH24
MATERIALSTEEL CORROSION RESISTING OVERALL
BEARING SURFACE TYPEWASHER FACED
SUBSTITUTES & CROSS-REFERENCES 1
5310PL2159945Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy 2643993?
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 2643993?
2643993 is a NUT,PLAIN,CASTELLATED,HEXAGON.
What parts can replace 2643993?
There is 1 known substitute for 2643993: 5310PL2159945. Substitute compatibility should be verified for your specific system.
What is the NSN for 2643993?
2643993 is cataloged in the U.S. Government catalog under NSN 5310-00-194-7149. 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 — 2643993

✓ 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.