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18181 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: COPPER ALLOY, thickness: 0.062 INCHES NOMINAL IN, body_style: STRAIGHT SHAPE, EXTERNAL COUPLING, shell_type: SOLID, thread_class: 2A A, overall_width: 1.875 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-078-0324, 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
18181
NSN: 5330-00-078-0324
FSC: 5330
CAGE: 71724 — JOHN CRANE, INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY
thickness0.062 INCHES NOMINAL IN
body_styleSTRAIGHT SHAPE, EXTERNAL COUPLING
shell_typeSOLID
thread_class2A A
overall_width1.875 INCHES NOMINAL IN
terminal_typePIN SINGLE MATING END SINGLE CONTACT GROUPING
overall_height1.875 INCHES NOMINAL IN
overall_length0.750 INCHES NOMINAL IN
shell_materialCOPPER ALLOY
insert_materialPLASTIC SINGLE MATING END
contact_materialCOPPER ALLOY SINGLE MATING END SINGLE CONTACT GROUPING
NSN5330-00-078-0324
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 18181 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
7224847P1Interchangeable
interchangeable cross-reference
interchangeable
PB60614BNPInterchangeable
interchangeable cross-reference
interchangeable
1818-1Interchangeable
interchangeable cross-reference
interchangeable
FKC5C5-32SInterchangeable
interchangeable cross-reference
interchangeable
20P102-16Interchangeable
interchangeable cross-reference
interchangeable
40-203-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18181?
18181 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 18181?
There are 13 known substitutes for 18181: 7224847P1, PB60614BNP, 1818-1 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 18181?
18181 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-078-0324. 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