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18239 ✓ Verified by PartsTable
Trefl · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The REACTOR is a Trefl industrial component. Key specifications include material: ASBESTOS AND STEEL OVERALL, body_width: 2.440 INCHES MAXIMUM IN, body_height: 2.250 INCHES MAXIMUM IN, body_length: 2.500 INCHES MAXIMUM IN, hole_diameter: 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-190-4254, 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
18239
NSN: 5330-00-190-4254
FSC: 5330
CAGE: 58849 — FMC TECHNOLOGIES INC DIV MATERIAL HANDLING SOLUTIONS (USA)
SPECIFICATIONS
materialASBESTOS AND STEEL OVERALL
body_width2.440 INCHES MAXIMUM IN
body_height2.250 INCHES MAXIMUM IN
body_length2.500 INCHES MAXIMUM IN
hole_diameter0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.500 INCHES NOMINAL IN
rating_methodELECTRICAL SINGLE COMPONENT ALL WINDING
inclosure_typeFULLY INCLOSED
inductance_typeFIXED
mounting_methodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
frequency_rating20.0 KILOHERTZ NOMINAL SINGLE COMPONENT
style_designatorNON-CIRCULAR
NSN5330-00-190-4254
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 18239 MFR: Trefl ⚠ 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
•
MATERIAL: ASBESTOS AND STEEL OVERALL
•
STYLE DESIGNATOR: NON-CIRCULAR
•
BOLT CIRCLE DIAMETER: 2.750 INCHES NOMINAL IN
•
OUTSIDE CORNER RADIUS: 0.375 INCHES NOMINAL IN
•
APERTURE DIAMETER: 1.500 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.078 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH3.500 INCHES NOMINAL IN
MATERIALASBESTOS AND STEEL OVERALL
STYLE DESIGNATORNON-CIRCULAR
BOLT CIRCLE DIAMETER2.750 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS0.375 INCHES NOMINAL IN
APERTURE DIAMETER1.500 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.078 INCHES NOMINAL IN
HOLE DIAMETER0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
SIDE RADIUS FROM GASKET CENTER1.125 INCHES NOMINAL IN
BOLT HOLE QUANTITY2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
934214-27CInterchangeable
interchangeable cross-reference
interchangeable
1828-37-2Interchangeable
interchangeable cross-reference
interchangeable
828Interchangeable
interchangeable cross-reference
interchangeable
21524B2BInterchangeable
interchangeable cross-reference
interchangeable
2152801Interchangeable
interchangeable cross-reference
interchangeable
2152801PInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18239?
18239 is a REACTOR manufactured by Trefl.
What parts can replace 18239?
There are 24 known substitutes for 18239: 934214-27C, 1828-37-2, 828 and 21 more. Substitute compatibility should be verified for your specific system.
Is 18239 still available?
18239 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