PartsTable
Technical Data Sheet
N81-03-4 ✓ 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

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: STEEL CASE, case_style: SQUARESQUARE, seal_width: 0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN, housing_bore_diameter: 2.502 INCHES NOMINAL2.502 INCHES NOMINAL IN, sealing_element_style: ANGULARANGULAR, accommodated_shaft_diameter: 1.750 INCHES NOMINAL1.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-508-1249, 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
N81-03-4
NSN: 5330-00-508-1249
FSC: 5330
CAGE: 03529 — AIR-A-PLANE CORP (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARESQUARE
seal_width0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
housing_bore_diameter2.502 INCHES NOMINAL2.502 INCHES NOMINAL IN
sealing_element_styleANGULARANGULAR
accommodated_shaft_diameter1.750 INCHES NOMINAL1.750 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE2000 FEET PER MINUTE FT
NSN5330-00-508-1249
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: N81-03-4 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
SEALING ELEMENT STYLE: ANGULARANGULAR
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE2000 FEET PER MINUTE FT
MATERIAL: RUBBER SYNTHETIC SEALING ELEMENT
ACCOMMODATED SHAFT DIAMETER: 1.750 INCHES NOMINAL1.750 INCHES NOMINAL IN
SEAL WIDTH: 0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
HOUSING BORE DIAMETER: 2.502 INCHES NOMINAL2.502 INCHES NOMINAL IN
CASE STYLE: SQUARESQUARE
TECHNICAL CHARACTERISTICS (FLIS)
SEALING ELEMENT STYLEANGULARANGULAR
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE2000 FEET PER MINUTE FT
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
ACCOMMODATED SHAFT DIAMETER1.750 INCHES NOMINAL1.750 INCHES NOMINAL IN
SEAL WIDTH0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
HOUSING BORE DIAMETER2.502 INCHES NOMINAL2.502 INCHES NOMINAL IN
MATERIALSTEEL CASE
CASE STYLESQUARESQUARE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
5346-1Interchangeable
interchangeable cross-reference
interchangeable
114-104-0004Interchangeable
interchangeable cross-reference
interchangeable
5346Interchangeable
interchangeable cross-reference
interchangeable
50352SInterchangeable
interchangeable cross-reference
interchangeable
V50352SInterchangeable
interchangeable cross-reference
interchangeable
330311Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is N81-03-4?
N81-03-4 is a SEAL,PLAIN ENCASED.
What parts can replace N81-03-4?
There are 23 known substitutes for N81-03-4: 5346-1, 114-104-0004, 5346 and 20 more. Substitute compatibility should be verified for your specific system.
Is N81-03-4 still available?
N81-03-4 is currently cancelled.
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