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44503 ✓ 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 GUIDE,VALVE STEM is a the manufacturer industrial component. Key specifications include style_designator: PLAIN FLANGED, end_item_identification: B-2 BOMBER, part_name_assigned_by_controlling_agency: GUIDE. 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
44503
NSN: 5330-00-508-1249
FSC: 5330
CAGE: 04627 — HYSTER-YALE GROUP, INC. DIV HYSTER-YALE MATERIALS HANDLING (USA)
SPECIFICATIONS
style_designatorPLAIN FLANGED
end_item_identificationB-2 BOMBER
part_name_assigned_by_controlling_agencyGUIDE
NSN5330-00-508-1249
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 44503 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 44503?
44503 is a GUIDE,VALVE STEM.
What parts can replace 44503?
There are 23 known substitutes for 44503: 5346-1, 114-104-0004, 5346 and 20 more. Substitute compatibility should be verified for your specific system.
Is 44503 still available?
44503 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