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Technical Data Sheet
PartsTable / COMPONENT / 1551AS294 1/2 IN.
1551AS294 1/2 IN. ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The 1551AS294 1/2 IN. 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 4730-01-300-4116, 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
1551AS294 1/2 IN.
NSN: 4730-01-300-4116
FSC: 4730
CAGE: 72423 — FLAGG STANLEY G & CO INC DBA FLAGG BRASS (USA)
SPECIFICATIONS
Part Number1551AS294 1/2 IN.
NSN4730-01-300-4116
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1551AS294 1/2 IN. · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD SERIES DESIGNATOR: NPT SECOND END
•
CONNECTION STYLE: PLAIN (PIPE) FIRST END
•
LEG LENGTH: 1.120 INCHES NOMINAL THIRD END IN
•
NOMINAL THREAD SIZE: 0.500 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORNPT SECOND END
CONNECTION STYLEPLAIN (PIPE) FIRST END
LEG LENGTH1.120 INCHES NOMINAL THIRD END IN
NOMINAL THREAD SIZE0.500 INCHES SECOND END IN
LEG LENGTH1.120 INCHES NOMINAL FIRST END IN
THREAD SERIES DESIGNATORNPT FIRST END
NOMINAL THREAD SIZE0.500 INCHES THIRD END IN
LEG LENGTH1.630 INCHES NOMINAL SECOND END IN
CONNECTION TYPETHREADED INTERNAL PIPE FIRST END
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS SINGLE RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
1551AS294Interchangeable
interchangeable cross-reference
interchangeable
661 3-4Interchangeable
interchangeable cross-reference
interchangeable
1551AS294-6X05Interchangeable
interchangeable cross-reference
interchangeable
1551AS294-2023Interchangeable
interchangeable cross-reference
interchangeable
1551AS294 1/4 IN.Interchangeable
interchangeable cross-reference
interchangeable
1551AS294-2042Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1551AS294 1/2 IN.?
1551AS294 1/2 IN. is a 1551AS294 1/2 IN..
What parts can replace 1551AS294 1/2 IN.?
There are 19 known substitutes for 1551AS294 1/2 IN.: 1551AS294, 661 3-4, 1551AS294-6X05 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1551AS294 1/2 IN.?
1551AS294 1/2 IN. is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-300-4116. 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