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388-8306 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

388-8306: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, center_hole_diameter: 18.904 INCHES MINIMUM AND 19.000 INCHES MAXIMUM IN, cross-sectional_height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-182-3159, 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
388-8306
NSN: 5331-00-182-3159
FSC: 5331 — O-ring
CAGE: 25184 — PARKER HANNIFIN CORPORATION DIV O-RING DIVISION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
center_hole_diameter18.904 INCHES MINIMUM AND 19.000 INCHES MAXIMUM IN
cross-sectional_height0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
NSN5331-00-182-3159
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 388-8306 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
•
CROSS-SECTIONAL HEIGHT: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 18.904 INCHES MINIMUM AND 19.000 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
CENTER HOLE DIAMETER18.904 INCHES MINIMUM AND 19.000 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES 1
68A75B470Reference document
Same NSN cross-reference
Reference document — Vendor item drawing 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 388-8306?
388-8306 is a O-RING.
What parts can replace 388-8306?
There is 1 known substitute for 388-8306: 68A75B470. Substitute compatibility should be verified for your specific system.
What is the NSN for 388-8306?
388-8306 is cataloged in the U.S. Government catalog under NSN 5331-00-182-3159. 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.