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Technical Data Sheet
PartsTable / COMPONENT / NAS813-18
NAS813-18 ✓ 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: 1.360 INCHES NOMINAL IN, inside_diameter_length: 0.560 INCHES NOMINAL IN, nondefinitive_spec/std_data: EMS 90376-IBR PART, round_cap_outside_surface_condition: SMOOTH. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-193-0783, 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
NAS813-18
NSN: 5340-00-193-0783
FSC: 5340
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialPLASTIC
design_typeFRICTION
overall_diameter1.360 INCHES NOMINAL IN
inside_diameter_length0.560 INCHES NOMINAL IN
nondefinitive_spec/std_dataEMS 90376-IBR PART
round_cap_outside_surface_conditionSMOOTH
material_document_and_classificationL-P-390, TYPE 1, CLASS L, GRADE 1 FED SPEC SINGLE MATERIAL RESPONSE
tube_outside_diameter_for_which_designed1.087 INCHES MINIMUM AND 1.107 INCHES MAXIMUM IN
NSN5340-00-193-0783
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: NAS813-18 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
•
INSIDE DIAMETER LENGTH: 0.531 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN
•
ROUND CAP OUTSIDE SURFACE CONDITION: SMOOTH
•
DESIGN TYPE: FRICTION
•
NONDEFINITIVE SPEC/STD DATA: EMS 90376-IBR PART
•
MATERIAL: PLASTIC
•
OVERALL DIAMETER: 1.299 INCHES MINIMUM AND 1.361 INCHES MAXIMUM IN
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.083 INCHES MINIMUM AND 1.103 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER LENGTH0.531 INCHES MINIMUM AND 0.593 INCHES MAXIMUM IN
ROUND CAP OUTSIDE SURFACE CONDITIONSMOOTH
DESIGN TYPEFRICTION
NONDEFINITIVE SPEC/STD DATAEMS 90376-IBR PART
MATERIALPLASTIC
OVERALL DIAMETER1.299 INCHES MINIMUM AND 1.361 INCHES MAXIMUM IN
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.083 INCHES MINIMUM AND 1.103 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
MS90376-40YUpgraded Successor
successor cross-reference
successor
MIL-C-5501Upgraded Successor
successor cross-reference
successor
AS90376Upgraded Successor
successor cross-reference
successor
M85049/138-34BUpgraded Successor
successor cross-reference
successor
MS90376-18Y-FUpgraded Successor
successor cross-reference
successor
6971-0014Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS813-18?
NAS813-18 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace NAS813-18?
There are 25 known substitutes for NAS813-18: MS90376-40Y, MIL-C-5501, AS90376 and 22 more. Substitute compatibility should be verified for your specific system.
Is NAS813-18 still available?
NAS813-18 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