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Technical Data Sheet
PartsTable / COMPONENT / NAS844-12
NAS844-12 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: PLASTIC, design_type: FRICTION, overall_diameter: 0.820 INCHES NOMINAL IN, special_features: UNAFFECTED BY OILS,GREASE OR GASOLINE, inside_diameter_length: 0.500 INCHES NOMINAL IN, round_cap_outside_surface_condition: SMOOTH. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-514-2434, 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
NAS844-12
NSN: 5340-00-514-2434
FSC: 5340
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter0.820 INCHES NOMINAL IN
special_featuresUNAFFECTED BY OILS,GREASE OR GASOLINE
inside_diameter_length0.500 INCHES NOMINAL IN
round_cap_outside_surface_conditionSMOOTH
tube_outside_diameter_for_which_designed0.688 INCHES NOMINAL IN
NSN5340-00-514-2434
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: NAS844-12 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
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
•
INSIDE DIAMETER LENGTH: 0.500 INCHES NOMINAL IN
•
MATERIAL: PLASTIC
•
OVERALL DIAMETER: 0.820 INCHES NOMINAL IN
•
DESIGN TYPE: FRICTION
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.688 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
INSIDE DIAMETER LENGTH0.500 INCHES NOMINAL IN
MATERIALPLASTIC
SPECIAL FEATURESUNAFFECTED BY OILS,GREASE OR GASOLINE
OVERALL DIAMETER0.820 INCHES NOMINAL IN
DESIGN TYPEFRICTION
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.688 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
KAPPEMB10R18Upgraded Successor
successor cross-reference
successor
FC-719Upgraded Successor
successor cross-reference
successor
494115000800Upgraded Successor
successor cross-reference
successor
5340PL0169464Upgraded Successor
successor cross-reference
successor
MS25177-18Upgraded Successor
successor cross-reference
successor
025-0484-000Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS844-12?
NAS844-12 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace NAS844-12?
There are 19 known substitutes for NAS844-12: KAPPEMB10R18, FC-719, 494115000800 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NAS844-12?
NAS844-12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-514-2434. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026