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Technical Data Sheet
PartsTable / COMPONENT / H300W/B
H300W/B ✓ 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 H300W/B 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 5340-01-024-7909, 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
H300W/B
NSN: 5340-01-024-7909
FSC: 5340
CAGE: 03743 — EGS ELECTRICAL GROUP APPLETON DIV (USA)
SPECIFICATIONS
Part NumberH300W/B
Wattage300W
NSN5340-01-024-7909
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: H300W/B 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
•
300W Power Rating
•
SUPPORTED ITEM AND QUANTITY: 1 CONDUIT
•
PIPE ACCOMMODATION DIAMETER: 3.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPLIT RING
TECHNICAL CHARACTERISTICS (FLIS)
SUPPORTED ITEM AND QUANTITY1 CONDUIT
PIPE ACCOMMODATION DIAMETER3.000 INCHES NOMINAL IN
STYLE DESIGNATORSPLIT RING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
38558Interchangeable
interchangeable cross-reference
interchangeable
154-125Interchangeable
interchangeable cross-reference
interchangeable
4310MInterchangeable
interchangeable cross-reference
interchangeable
3417-2271-1223Interchangeable
interchangeable cross-reference
interchangeable
7BInterchangeable
interchangeable cross-reference
interchangeable
JMS-6285Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H300W/B?
H300W/B is a H300W/B.
What parts can replace H300W/B?
There are 9 known substitutes for H300W/B: 38558, 154-125, 4310M and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H300W/B?
H300W/B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-024-7909. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026