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Technical Data Sheet
PartsTable / COMPONENT / 15A3-4
15A3-4 ✓ 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: SQUARE, seal_width: 0.500 INCHES NOMINAL IN, housing_bore_diameter: 3.751 INCHES NOMINAL IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 3.000 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 5330-00-154-8367, 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
15A3-4
NSN: 5330-00-154-8367
FSC: 5330
CAGE: 03956 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.500 INCHES NOMINAL IN
housing_bore_diameter3.751 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter3.000 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5330-00-154-8367
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 15A3-4 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
•
CASE STYLE: SQUARE
•
HOUSING BORE DIAMETER: 3.751 INCHES NOMINAL IN
•
MATERIAL: STEEL CASE
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
SEALING ELEMENT STYLE: ANGULAR
•
SEAL WIDTH: 0.500 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT DIAMETER: 3.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CASE STYLESQUARE
HOUSING BORE DIAMETER3.751 INCHES NOMINAL IN
MATERIALSTEEL CASE
MATERIALLEATHER SEALING ELEMENT
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
SEALING ELEMENT STYLEANGULAR
SEAL WIDTH0.500 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER3.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
3753Interchangeable
interchangeable cross-reference
interchangeable
8814100008-1Interchangeable
interchangeable cross-reference
interchangeable
3757Interchangeable
interchangeable cross-reference
interchangeable
C5114372Interchangeable
interchangeable cross-reference
interchangeable
3990AVInterchangeable
interchangeable cross-reference
interchangeable
3723Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 15A3-4?
15A3-4 is a SEAL,PLAIN ENCASED.
What parts can replace 15A3-4?
There are 10 known substitutes for 15A3-4: 3753, 8814100008-1, 3757 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 15A3-4?
15A3-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-154-8367. 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