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Technical Data Sheet
PartsTable / COMPONENT / H 00550
H 00550 ✓ 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

COUPLING ASSEMBLY,QUICK DISCONNE. Key specifications include material: STEEL OVERALL, overall_length: 4.050 INCHES NOMINAL IN, connection_type: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION, connection_style: PLAIN FIRST FLUID END CONNECTION, style_designator: COUPLING ASSEMBLY, features_provided: SELF-SEALING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-863-1943, 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 00550
NSN: 4730-00-863-1943
FSC: 4730
CAGE: 38490 — LIFTKING MANUFACTURING CORP (CAN)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length4.050 INCHES NOMINAL IN
connection_typeTHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
connection_stylePLAIN FIRST FLUID END CONNECTION
style_designatorCOUPLING ASSEMBLY
features_providedSELF-SEALING
operating_pressure6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.500 INCHES FIRST FLUID END CONNECTION IN
maximum_operating_temp121.0 CELSIUS SINGLE RESPONSE DEGC
quick_disconnect_methodSPRING PUSH-LOCK ALL ENDS
thread_series_designatorNPSF FIRST FLUID END CONNECTION
nominal_pipe_size_accommodated0.500 INCHES FIRST FLUID END CONNECTION IN
NSN4730-00-863-1943
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: H 00550 · 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 PIPE SIZE ACCOMMODATED: 0.500 INCHES FIRST FLUID END CONNECTION IN
•
NOMINAL THREAD SIZE: 0.500 INCHES FIRST FLUID END CONNECTION IN
•
THREAD SERIES DESIGNATOR: NPSF FIRST FLUID END CONNECTION
•
OPERATING PRESSURE: 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
STYLE DESIGNATOR: COUPLING ASSEMBLY
•
MATERIAL: STEEL OVERALL
•
QUICK DISCONNECT METHOD: SPRING PUSH-LOCK ALL ENDS
•
CONNECTION TYPE: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL PIPE SIZE ACCOMMODATED0.500 INCHES FIRST FLUID END CONNECTION IN
NOMINAL THREAD SIZE0.500 INCHES FIRST FLUID END CONNECTION IN
THREAD SERIES DESIGNATORNPSF FIRST FLUID END CONNECTION
OPERATING PRESSURE6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
STYLE DESIGNATORCOUPLING ASSEMBLY
MATERIALSTEEL OVERALL
QUICK DISCONNECT METHODSPRING PUSH-LOCK ALL ENDS
CONNECTION TYPETHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
FEATURES PROVIDEDSELF-SEALING
MAXIMUM OPERATING TEMP121.0 CELSIUS SINGLE RESPONSE DEGC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
S500Interchangeable
interchangeable cross-reference
interchangeable
23039030Interchangeable
interchangeable cross-reference
interchangeable
B1400-924Interchangeable
interchangeable cross-reference
interchangeable
S5001Interchangeable
interchangeable cross-reference
interchangeable
LA203Interchangeable
interchangeable cross-reference
interchangeable
DS50Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H 00550?
H 00550 is a COUPLING ASSEMBLY,QUICK DISCONNE.
What parts can replace H 00550?
There are 17 known substitutes for H 00550: S500, 23039030, B1400-924 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H 00550?
H 00550 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-863-1943. 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