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Technical Data Sheet
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1138G — 1138G

✓ Government record, cited
TIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR · ORING SEAL
PRODUCT OVERVIEW

1138G: 1138G.

The 1138G is a TIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR industrial component. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-454-9477, 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
1138G
NSN: 5330-01-454-9477
FSC: 5330 — Packing and Gasket Materials
CAGE: 17454 — TIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR (USA)
SPECIFICATIONS
Part Number1138G
ManufacturerTIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR
NSN5330-01-454-9477
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1138G MFR: TIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR ⚠ 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
•
CROSS-SECTIONAL THICKNESS: 0.048 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 4.120 INCHES NOMINAL IN
•
APERTURE DIAMETER: 2.380 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.048 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER4.120 INCHES NOMINAL IN
APERTURE DIAMETER2.380 INCHES NOMINAL IN
SPECIAL FEATURES2 INCH PIPE SIZE IN
SUBSTITUTES & CROSS-REFERENCES 2
001138G22-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
003054G39 PIECE 10Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1138G?
1138G is a 1138G manufactured by TIMKEN GEARS & SERVICES INC. DIV PHILADELPHIA GEAR.
What parts can replace 1138G?
There are 2 known substitutes for 1138G: 001138G22-1, 003054G39 PIECE 10. Substitute compatibility should be verified for your specific system.
What is the NSN for 1138G?
1138G is cataloged in the U.S. Government catalog under NSN 5330-01-454-9477. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.