PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 1/2X4-1/2IN.
1/2X4-1/2IN. ✓ 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 1/2X4-1/2IN. 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 4730-01-301-4259, 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
1/2X4-1/2IN.
NSN: 4730-01-301-4259
FSC: 4730
CAGE: 72423 — FLAGG STANLEY G & CO INC DBA FLAGG BRASS (USA)
SPECIFICATIONS
Part Number1/2X4-1/2IN.
NSN4730-01-301-4259
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1/2X4-1/2IN. · 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 ALL ENDS
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: LONG
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
•
OPERATING PRESSURE: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MATERIAL DOCUMENT AND CLASSIFICATION: A733 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
MEDIA FOR WHICH DESIGNED: WATER-OIL-GAS SINGLE RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORNPT ALL ENDS
MATERIALSTEEL OVERALL
STYLE DESIGNATORLONG
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
OPERATING PRESSURE300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MATERIAL DOCUMENT AND CLASSIFICATIONA733 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MEDIA FOR WHICH DESIGNEDWATER-OIL-GAS SINGLE RESPONSE
SPECIAL FEATURESCLEANLINESS SHALL BE IN ACCORDANCE WITH MIL-C-52211 FOR OXYGEN SERVICE
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
NOMINAL OVERALL LENGTH4.500 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
2X7IN.Interchangeable
interchangeable cross-reference
interchangeable
1551AS292-2022Interchangeable
interchangeable cross-reference
interchangeable
WW-N-351Interchangeable
interchangeable cross-reference
interchangeable
NIPPLEPIPE1-4-18Interchangeable
interchangeable cross-reference
interchangeable
4049-04008Interchangeable
interchangeable cross-reference
interchangeable
C0ML 1/4 NPT X 2 LGInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1/2X4-1/2IN.?
1/2X4-1/2IN. is a 1/2X4-1/2IN..
What parts can replace 1/2X4-1/2IN.?
There are 23 known substitutes for 1/2X4-1/2IN.: 2X7IN., 1551AS292-2022, WW-N-351 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1/2X4-1/2IN.?
1/2X4-1/2IN. is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-301-4259. 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