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Technical Data Sheet
PartsTable / COMPONENT / MS9388-026
MS9388-026 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER FLUOROCARBON CLASS FPM, temp_rating: -15.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, outside_diameter: 1.362 INCHES MINIMUM AND 1.396 INCHES MAXIMUM IN, center_hole_diameter: 1.233 INCHES MINIMUM AND 1.245 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-111-3718, 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
MS9388-026
NSN: 5330-00-111-3718
FSC: 5330
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
temp_rating-15.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter1.362 INCHES MINIMUM AND 1.396 INCHES MAXIMUM IN
center_hole_diameter1.233 INCHES MINIMUM AND 1.245 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
NSN5330-00-111-3718
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS9388-026 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: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 1.233 INCHES MINIMUM AND 1.245 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
CENTER HOLE DIAMETER1.233 INCHES MINIMUM AND 1.245 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
AS3209-026Interchangeable
interchangeable cross-reference
interchangeable
AS3209Interchangeable
interchangeable cross-reference
interchangeable
B-631-12505-41Interchangeable
interchangeable cross-reference
interchangeable
5330PL2000083Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS9388-026?
MS9388-026 is a O-RING.
What parts can replace MS9388-026?
There are 4 known substitutes for MS9388-026: AS3209-026, AS3209, B-631-12505-41 and 1 more. Substitute compatibility should be verified for your specific system.
Is MS9388-026 still available?
MS9388-026 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026