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MS9386-338 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MS9386-338: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE CLASS Q, temp_rating: -85.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, outside_diameter: 3.520 INCHES NOMINAL IN, center_hole_diameter: 3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-493-8258, 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
MS9386-338
NSN: 5331-00-493-8258
FSC: 5331 — O-ring
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialRUBBER SILICONE CLASS Q
temp_rating-85.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter3.520 INCHES NOMINAL IN
center_hole_diameter3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
NSN5331-00-493-8258
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS9386-338 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: -85.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 3.520 INCHES NOMINAL IN
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
CENTER HOLE DIAMETER: 3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SILICONE CLASS Q
TECHNICAL CHARACTERISTICS
TEMP RATING-85.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
OUTSIDE DIAMETER3.520 INCHES NOMINAL IN
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
ELONGATION PERCENTAGE125 MAXIMUM
CENTER HOLE DIAMETER3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN
MATERIALRUBBER SILICONE CLASS Q
SUBSTITUTES & CROSS-REFERENCES 7
2-338 S355-75Reference document
Same NSN cross-reference
Reference document — Secondary reference
A-338TH1167Reference document
Same NSN cross-reference
Reference document — Secondary reference
338-11737Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS9386Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-AS9386Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
PRP338-11737Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 MS9386-338?
MS9386-338 is a O-RING.
What parts can replace MS9386-338?
There are 7 known substitutes for MS9386-338: 2-338 S355-75, A-338TH1167, 338-11737 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS9386-338?
MS9386-338 is cataloged in the U.S. Government catalog under NSN 5331-00-493-8258. 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.