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6840363-14 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6840363-14: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: ALUMINUM, design_type: THREADED, thread_class: 2B, overall_diameter: 0.817 INCHES MINIMUM AND 0.819 INCHES MAXIMUM IN, inside_diameter_length: 0.845 INCHES MINIMUM AND 0.905 INCHES MAXIMUM IN, round_cap_outside_surface_condition: SERRATED. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-045-3192, 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
6840363-14
NSN: 5340-00-045-3192
FSC: 5340 — Hardware, Commercial
CAGE: 73342 — ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC (USA)
SPECIFICATIONS
materialALUMINUM
design_typeTHREADED
thread_class2B
overall_diameter0.817 INCHES MINIMUM AND 0.819 INCHES MAXIMUM IN
inside_diameter_length0.845 INCHES MINIMUM AND 0.905 INCHES MAXIMUM IN
round_cap_outside_surface_conditionSERRATED
thread_size_and_series/type_designator7/8-20 UNEF OR 7/8-20 NEF
NSN5340-00-045-3192
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6840363-14 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
•
DESIGN TYPE: THREADED
•
OVERALL DIAMETER: 0.817 INCHES MINIMUM AND 0.819 INCHES MAXIMUM IN
•
THREAD CLASS: 2B
•
MATERIAL: ALUMINUM
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 7/8-20 UNEF OR 7/8-20 NEF
•
INSIDE DIAMETER LENGTH: 0.845 INCHES MINIMUM AND 0.905 INCHES MAXIMUM IN
•
ROUND CAP OUTSIDE SURFACE CONDITION: SERRATED
TECHNICAL CHARACTERISTICS
DESIGN TYPETHREADED
OVERALL DIAMETER0.817 INCHES MINIMUM AND 0.819 INCHES MAXIMUM IN
THREAD CLASS2B
MATERIALALUMINUM
THREAD SIZE AND SERIES/TYPE DESIGNATOR7/8-20 UNEF OR 7/8-20 NEF
INSIDE DIAMETER LENGTH0.845 INCHES MINIMUM AND 0.905 INCHES MAXIMUM IN
ROUND CAP OUTSIDE SURFACE CONDITIONSERRATED
SUBSTITUTES & CROSS-REFERENCES 1
EP14Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6840363-14?
6840363-14 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 6840363-14?
There is 1 known substitute for 6840363-14: EP14. Substitute compatibility should be verified for your specific system.
What is the NSN for 6840363-14?
6840363-14 is cataloged in the U.S. Government catalog under NSN 5340-00-045-3192. 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.