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Technical Data Sheet
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CGA540 ✓ 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

ADAPTER,STRAIGHT,PIPE TO GAS FIT. Key specifications include material: COPPER ALLOY BODY, seat_angle: 30.0 DEGREES SECOND END, connection_type: THREADED INTERNAL PIPE FIRST END, connection_style: INVERTED FLARE (GAS FITTING) SECOND END, special_features: WITH FLOWMETER, operating_pressure: 9600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-200-3896, 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
CGA540
NSN: 4730-00-200-3896
FSC: 4730
CAGE: 01701 — COMPRESSED GAS ASSN (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
seat_angle30.0 DEGREES SECOND END
connection_typeTHREADED INTERNAL PIPE FIRST END
connection_styleINVERTED FLARE (GAS FITTING) SECOND END
special_featuresWITH FLOWMETER
operating_pressure9600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.903 INCHES SECOND END IN
seat_nominal_radius0.062 INCHES SECOND END IN
maximum_operating_temp320.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length1.140 INCHES IN
end_item_identificationDECK SHELTER PORTABLE CALIBRATION KIT FOR PARTIAL O2 AND CO2 MONITORS
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
NSN4730-00-200-3896
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: CGA540 · 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
•
NOMINAL OVERALL LENGTH: 3.000 INCHES IN
•
NOMINAL THREAD SIZE: 0.908 INCHES SECOND END IN
•
THREAD SERIES DESIGNATOR: NPT FIRST END
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MEDIA FOR WHICH DESIGNED: OXYGEN, GASEOUS SINGLE RESPONSE
•
SEAT NOMINAL RADIUS: 0.062 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL OVERALL LENGTH3.000 INCHES IN
NOMINAL THREAD SIZE0.908 INCHES SECOND END IN
THREAD SERIES DESIGNATORNPT FIRST END
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MEDIA FOR WHICH DESIGNEDOXYGEN, GASEOUS SINGLE RESPONSE
SEAT NOMINAL RADIUS0.062 INCHES SECOND END IN
THREAD SERIES DESIGNATORNGO SECOND END
NOMINAL THREAD SIZE0.250 INCHES FIRST END IN
CONNECTION TYPETHREADED INTERNAL GAS FITTING SECOND END
MATERIALCOPPER ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
N876AInterchangeable
interchangeable cross-reference
interchangeable
415-1Interchangeable
interchangeable cross-reference
interchangeable
CGA-540Interchangeable
interchangeable cross-reference
interchangeable
516-6295520-IT2Interchangeable
interchangeable cross-reference
interchangeable
8-DF-02Interchangeable
interchangeable cross-reference
interchangeable
473000388Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CGA540?
CGA540 is a ADAPTER,STRAIGHT,PIPE TO GAS FIT.
What parts can replace CGA540?
There are 6 known substitutes for CGA540: N876A, 415-1, CGA-540 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CGA540?
CGA540 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-200-3896. 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