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Technical Data Sheet
PartsTable / COMPONENT / 52-W-2291-20
52-W-2291-20 ✓ 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: 0.438 INCHES NOMINAL IN, temp_rating: -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF, outside_diameter: 4.506 INCHES NOMINAL IN, surface_treatment: PLASTIC CASE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-404-4056, 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
52-W-2291-20
NSN: 5330-00-404-4056
FSC: 5330
CAGE: 21439 — CURTISS-WRIGHT FLOW CONTROL SERVICE, LLC DBA ENGINEERED ARRESTING SYSTEMS - ESCO DIV CW FLOW CONTROL SVC LLC DBA (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.438 INCHES NOMINAL IN
temp_rating-65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF
outside_diameter4.506 INCHES NOMINAL IN
surface_treatmentPLASTIC CASE
housing_bore_diameter4.500 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter3.500 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed3600 FEET PER MINUTE FT
NSN5330-00-404-4056
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 52-W-2291-20 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
•
SEAL WIDTH: 0.438 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
SEALING ELEMENT STYLE: ANGULAR
•
MATERIAL: STEEL CASE
•
HOUSING BORE DIAMETER: 4.500 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 3600 FEET PER MINUTE FT
•
SURFACE TREATMENT: PLASTIC CASE
TECHNICAL CHARACTERISTICS (FLIS)
SEAL WIDTH0.438 INCHES NOMINAL IN
CASE STYLESQUARE
SEALING ELEMENT STYLEANGULAR
MATERIALSTEEL CASE
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
HOUSING BORE DIAMETER4.500 INCHES NOMINAL IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED3600 FEET PER MINUTE FT
SURFACE TREATMENTPLASTIC CASE
ACCOMMODATED SHAFT DIAMETER3.500 INCHES NOMINAL IN
OUTSIDE DIAMETER4.506 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
RD55146Interchangeable
interchangeable cross-reference
interchangeable
D55146Interchangeable
interchangeable cross-reference
interchangeable
55146Interchangeable
interchangeable cross-reference
interchangeable
SMB187060Interchangeable
interchangeable cross-reference
interchangeable
12302Interchangeable
interchangeable cross-reference
interchangeable
2378Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 52-W-2291-20?
52-W-2291-20 is a SEAL,PLAIN ENCASED.
What parts can replace 52-W-2291-20?
There are 14 known substitutes for 52-W-2291-20: RD55146, D55146, 55146 and 11 more. Substitute compatibility should be verified for your specific system.
Is 52-W-2291-20 still available?
52-W-2291-20 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