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PartsTable / COMPONENT / H-1 3/8
H-1 3/8 ✓ 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 H-1 3/8 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-298-1365, 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
H-1 3/8
NSN: 5340-01-298-1365
FSC: 5340
CAGE: 34669 — BUNZL PLASTIC INC DBA ALLIANCE PLASTICS (USA)
SPECIFICATIONS
Part NumberH-1 3/8
NSN5340-01-298-1365
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: H-1 3/8 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
•
INSIDE DIAMETER LENGTH: 0.625 INCHES NOMINAL IN
•
MATERIAL: PLASTIC, POLYETHYLENE (PP)
•
DESIGN TYPE: THREADED
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1.375-18 UNEF
•
OVERALL DIAMETER: 1.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER LENGTH0.625 INCHES NOMINAL IN
MATERIALPLASTIC, POLYETHYLENE (PP)
DESIGN TYPETHREADED
THREAD SIZE AND SERIES/TYPE DESIGNATOR1.375-18 UNEF
OVERALL DIAMETER1.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
H138Interchangeable
interchangeable cross-reference
interchangeable
121-045-0001Interchangeable
interchangeable cross-reference
interchangeable
H138GRInterchangeable
interchangeable cross-reference
interchangeable
H138UInterchangeable
interchangeable cross-reference
interchangeable
1005442-1Interchangeable
interchangeable cross-reference
interchangeable
292-5714P1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H-1 3/8?
H-1 3/8 is a H-1 3/8.
What parts can replace H-1 3/8?
There are 10 known substitutes for H-1 3/8: H138, 121-045-0001, H138GR and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H-1 3/8?
H-1 3/8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-298-1365. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026