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PartsTable / COMPONENT / R500-4
R500-4 ✓ 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 ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2A FIRST END2A FIRST END A, connection_type: THREADED EXTERNAL PIPE SECOND ENDTHREADED EXTERNAL PIPE SECOND END, connection_style: PLAIN (PIPE) SECOND ENDPLAIN (PIPE) SECOND END, surface_treatment: CADMIUM OUTSIDE, operating_pressure: 5200.0 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 4730-00-428-5505, 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
R500-4
NSN: 4730-00-428-5505
FSC: 4730
CAGE: 70026 — CHICAGO FITTINGS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A FIRST END2A FIRST END A
connection_typeTHREADED EXTERNAL PIPE SECOND ENDTHREADED EXTERNAL PIPE SECOND END
connection_stylePLAIN (PIPE) SECOND ENDPLAIN (PIPE) SECOND END
surface_treatmentCADMIUM OUTSIDE
operating_pressure5200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.125 INCHES SECOND END0.125 INCHES SECOND END IN
nominal_overall_length0.984 INCHES IN
thread_quantity_per_inch20 FIRST END20 FIRST END
thread_series_designatorNPTF SECOND END
furnished_items_and_quantity1 CUSHION UNIT AND 1 SHORT COUPLING NUT
nominal_pipe_size_accommodated0.125 INCHES SECOND END0.125 INCHES SECOND END IN
NSN4730-00-428-5505
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: R500-4 · 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
•
MATERIAL: STEEL OVERALL
•
CONNECTION TYPE: THREADED EXTERNAL PIPE SECOND ENDTHREADED EXTERNAL PIPE SECOND END
•
NOMINAL PIPE SIZE ACCOMMODATED: 0.125 INCHES SECOND END0.125 INCHES SECOND END IN
•
THREAD CLASS: 2A FIRST END2A FIRST END A
•
NOMINAL THREAD SIZE: 0.125 INCHES SECOND END0.125 INCHES SECOND END IN
•
SURFACE TREATMENT: CADMIUM OUTSIDE
•
CONNECTION STYLE: GASKET SEAL (TUBE) FIRST ENDGASKET SEAL (TUBE) FIRST END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
CONNECTION TYPETHREADED EXTERNAL PIPE SECOND ENDTHREADED EXTERNAL PIPE SECOND END
NOMINAL PIPE SIZE ACCOMMODATED0.125 INCHES SECOND END0.125 INCHES SECOND END IN
THREAD CLASS2A FIRST END2A FIRST END A
NOMINAL THREAD SIZE0.125 INCHES SECOND END0.125 INCHES SECOND END IN
SURFACE TREATMENTCADMIUM OUTSIDE
CONNECTION STYLEGASKET SEAL (TUBE) FIRST ENDGASKET SEAL (TUBE) FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
OPERATING PRESSURE5200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
THREAD SERIES DESIGNATORNPTF SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
124-4Interchangeable
interchangeable cross-reference
interchangeable
666-4Interchangeable
interchangeable cross-reference
interchangeable
R101-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R500-4?
R500-4 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace R500-4?
There are 3 known substitutes for R500-4: 124-4, 666-4, R101-4. Substitute compatibility should be verified for your specific system.
What is the NSN for R500-4?
R500-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-428-5505. 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