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R305-242G — SEAL,PLAIN

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

R305-242G: SEAL,PLAIN.

The SEAL,PLAIN is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE AND GRAPHITE SEALING ELEMENT, seal_width: 0.181 INCHES MINIMUM AND 0.212 INCHES MAXIMUM IN, temp_rating: -20.0 FAHRENHEIT AND 550.0 FAHRENHEIT DEGF, construction: TWO-PIECE, special_features: FLANGE ON OD OF ONE SIDE, housing_bore_diameter: 4.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-027-6445, 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
R305-242G
NSN: 5330-01-027-6445
FSC: 5330 — Packing and Gasket Materials
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE AND GRAPHITE SEALING ELEMENT
seal_width0.181 INCHES MINIMUM AND 0.212 INCHES MAXIMUM IN
temp_rating-20.0 FAHRENHEIT AND 550.0 FAHRENHEIT DEGF
constructionTWO-PIECE
special_featuresFLANGE ON OD OF ONE SIDE
housing_bore_diameter4.250 INCHES NOMINAL IN
accommodated_shaft_diameter4.000 INCHES NOMINAL IN
material_document_and_classificationQQ-W-423,COMP 302,COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING
NSN5330-01-027-6445
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: R305-242G 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
•
TEMP RATING: -20.0 FAHRENHEIT AND 550.0 FAHRENHEIT DEGF
•
SEAL WIDTH: 0.181 INCHES MINIMUM AND 0.212 INCHES MAXIMUM IN
•
HOUSING BORE DIAMETER: 4.250 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-423,COMP 302,COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING
•
ACCOMMODATED SHAFT DIAMETER: 4.000 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 302 SPRING
TECHNICAL CHARACTERISTICS
TEMP RATING-20.0 FAHRENHEIT AND 550.0 FAHRENHEIT DEGF
SEAL WIDTH0.181 INCHES MINIMUM AND 0.212 INCHES MAXIMUM IN
HOUSING BORE DIAMETER4.250 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-423,COMP 302,COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING
SPECIAL FEATURESFLANGE ON OD OF ONE SIDE
ACCOMMODATED SHAFT DIAMETER4.000 INCHES NOMINAL IN
MATERIALSTEEL COMP 302 SPRING
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE AND GRAPHITE SEALING ELEMENT
CONSTRUCTIONTWO-PIECE
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is R305-242G?
R305-242G is a SEAL,PLAIN.
What is the NSN for R305-242G?
R305-242G is cataloged in the U.S. Government catalog under NSN 5330-01-027-6445. 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.