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PartsTable / COMPONENT / 139981
139981 ✓ 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

RESISTOR,VARIABLE,NONWIRE WOUND,. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT, thickness: 0.188 INCHES NOMINAL IN, body_style: ANGLE, SHAPE, INTERNAL COUPLING, case_style: SQUARE, key_height: 0.313 INCHES NOMINAL IN, seal_width: 0.500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-213-8881, 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
139981
NSN: 5340-00-213-8881
FSC: 5340
CAGE: 0AHP5 — CURTISS-WRIGHT CONTROLS, INC. DIV ACTUATION DIVISION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
thickness0.188 INCHES NOMINAL IN
body_styleANGLE, SHAPE, INTERNAL COUPLING
case_styleSQUARE
key_height0.313 INCHES NOMINAL IN
seal_width0.500 INCHES NOMINAL IN
shell_typeSOLID
body_length1.800 INCHES MAXIMUM IN
shaft_styleROUND
bearing_typeBALL SHAFT
pilot_length0.1320 INCHES NOMINAL IN
shaft_length0.672 INCHES NOMINAL IN
NSN5340-00-213-8881
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 139981 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 27
P10549Upgraded Successor
successor cross-reference
successor
EC-12Upgraded Successor
successor cross-reference
successor
23417Upgraded Successor
successor cross-reference
successor
801252Upgraded Successor
successor cross-reference
successor
6971-0014Upgraded Successor
successor cross-reference
successor
MS90376-12RBUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 139981?
139981 is a RESISTOR,VARIABLE,NONWIRE WOUND,.
What parts can replace 139981?
There are 27 known substitutes for 139981: P10549, EC-12, 23417 and 24 more. Substitute compatibility should be verified for your specific system.
Is 139981 still available?
139981 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