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5-557N304-75 — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5-557N304-75: PACKING,PREFORMED.

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, temp_rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL OVERALL, peripheral_diameter: 3.301 INCHES MINIMUM AND 3.361 INCHES MAXIMUM IN, center_hole_diameter: 3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM IN, elongation_percentage: 164 MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-763-2508, 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
5-557N304-75
NSN: 5331-00-763-2508
NIINs: 007632508, 010523723
FSC: 5331 — O-ring
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
temp_rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A NOMINAL OVERALL
peripheral_diameter3.301 INCHES MINIMUM AND 3.361 INCHES MAXIMUM IN
center_hole_diameter3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM IN
elongation_percentage164 MAXIMUM
cross-sectional_height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
cross-sectional_shape_styleO-RING
cross_section_outside_diameter0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
NSN5331-00-763-2508
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5-557N304-75 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: -35.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 3.301 INCHES MINIMUM AND 3.361 INCHES MAXIMUM IN
•
HARDNESS RATING: 70.0 SHORE DUROMETER A NOMINAL
•
CENTER HOLE DIAMETER: 3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM IN
•
MATERIAL: RUBBER CHLOROPRENE CLASS CR
TECHNICAL CHARACTERISTICS
TEMP RATING-35.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
OUTSIDE DIAMETER3.301 INCHES MINIMUM AND 3.361 INCHES MAXIMUM IN
HARDNESS RATING70.0 SHORE DUROMETER A NOMINAL
CENTER HOLE DIAMETER3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM IN
MATERIALRUBBER CHLOROPRENE CLASS CR
SUBSTITUTES & CROSS-REFERENCES 2
5-557 C873-70Reference document
Same NSN cross-reference
Reference document — Secondary reference
5-557C147-7Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5-557N304-75?
5-557N304-75 is a PACKING,PREFORMED.
What parts can replace 5-557N304-75?
There are 2 known substitutes for 5-557N304-75: 5-557 C873-70, 5-557C147-7. Substitute compatibility should be verified for your specific system.
What is the NSN for 5-557N304-75?
5-557N304-75 is cataloged in the U.S. Government catalog under NSN 5331-00-763-2508. 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.