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Technical Data Sheet
158503R1 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER OVERALL, outside_diameter: 4.230 INCHES MINIMUM AND 4.245 INCHES MAXIMUM IN, style_designator: CIRCULAR, aperture_diameter: 3.875 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN, cross-sectional_thickness: 0.127 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-729-4333, 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
158503R1
NSN: 5330-00-729-4333
FSC: 5330
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialRUBBER OVERALL
outside_diameter4.230 INCHES MINIMUM AND 4.245 INCHES MAXIMUM IN
style_designatorCIRCULAR
aperture_diameter3.875 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
cross-sectional_thickness0.127 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-729-4333
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 158503R1 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
APERTURE DIAMETER: 3.875 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
OUTSIDE DIAMETER: 4.230 INCHES MINIMUM AND 4.245 INCHES MAXIMUM IN
CROSS-SECTIONAL THICKNESS: 0.127 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
STYLE DESIGNATOR: CIRCULAR
MATERIAL: RUBBER OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
APERTURE DIAMETER3.875 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
OUTSIDE DIAMETER4.230 INCHES MINIMUM AND 4.245 INCHES MAXIMUM IN
CROSS-SECTIONAL THICKNESS0.127 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
STYLE DESIGNATORCIRCULAR
MATERIALRUBBER OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
T21S8Interchangeable
interchangeable cross-reference
interchangeable
4046663Interchangeable
interchangeable cross-reference
interchangeable
925479Interchangeable
interchangeable cross-reference
interchangeable
060467Interchangeable
interchangeable cross-reference
interchangeable
6046Interchangeable
interchangeable cross-reference
interchangeable
6049Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 158503R1?
158503R1 is a GASKET.
What parts can replace 158503R1?
There are 24 known substitutes for 158503R1: T21S8, 4046663, 925479 and 21 more. Substitute compatibility should be verified for your specific system.
Is 158503R1 still available?
158503R1 is currently cancelled.
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