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Technical Data Sheet
PartsTable / COMPONENT / NAS820-12A
NAS820-12A ✓ 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

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: PLASTIC, design_type: FRICTION, overall_diameter: 0.870 INCHES NOMINAL IN, features_provided: SHOULDER, nondefinitive_spec/std_data: NAS820-12A PART A, connector_nominal_thread_size_for_which_designed: 0.750 INCHES IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-014-0008, 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
NAS820-12A
NSN: 5340-00-014-0008
FSC: 5340
CAGE: K5086 — ROLLS-ROYCE SUBMARINES LIMITED (GBR)
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter0.870 INCHES NOMINAL IN
features_providedSHOULDER
nondefinitive_spec/std_dataNAS820-12A PART A
connector_nominal_thread_size_for_which_designed0.750 INCHES IN
NSN5340-00-014-0008
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: NAS820-12A 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
•
FEATURES PROVIDED: SHOULDER
•
DESIGN TYPE: FRICTION
•
NONDEFINITIVE SPEC/STD DATA: NAS820-12A PART A
•
MATERIAL: PLASTIC
•
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED: 0.750 INCHES IN
•
OVERALL DIAMETER: 0.870 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
FEATURES PROVIDEDSHOULDER
DESIGN TYPEFRICTION
NONDEFINITIVE SPEC/STD DATANAS820-12A PART A
MATERIALPLASTIC
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED0.750 INCHES IN
OVERALL DIAMETER0.870 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
325369PC2Upgraded Successor
successor cross-reference
successor
EP12Upgraded Successor
successor cross-reference
successor
90848-12Upgraded Successor
successor cross-reference
successor
325092-3Upgraded Successor
successor cross-reference
successor
NAS820Interchangeable
interchangeable cross-reference
interchangeable
NAS820-10AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS820-12A?
NAS820-12A is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace NAS820-12A?
There are 17 known substitutes for NAS820-12A: 325369PC2, EP12, 90848-12 and 14 more. Substitute compatibility should be verified for your specific system.
Is NAS820-12A still available?
NAS820-12A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026