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Technical Data Sheet
PartsTable / COMPONENT / S6PHN4-4-56
S6PHN4-4-56 ✓ 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 COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING BODY, seat_angle: 37.0 DEGREES, thread_class: 3A ALL ENDS A, overall_length: 2.015 INCHES NOMINAL IN, connection_type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION, connection_style: FLARED ALL ENDS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-722-3462, 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
S6PHN4-4-56
NSN: 4730-00-722-3462
FSC: 4730
CAGE: 78357 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV QUICK COUPLER DIVISION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
seat_angle37.0 DEGREES
thread_class3A ALL ENDS A
overall_length2.015 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
connection_styleFLARED ALL ENDS
style_designatorMALE COUPLING HALF
features_providedSAFETY LOCKING FEATURE
surface_treatmentPASSIVATE BODY
nominal_thread_size0.438 INCHES ALL ENDS IN
quick_disconnect_methodPUSH-PULL ALL ENDS
thread_series_designatorUNF ALL ENDS
NSN4730-00-722-3462
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: S6PHN4-4-56 · 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 DOCUMENT AND CLASSIFICATION: MIL-S-763,CL 303,ASIA 303 MIL SPEC SINGLE MATERIAL RESPONSE BODY
•
THREAD SERIES DESIGNATOR: UNF ALL ENDS
•
NOMINAL THREAD SIZE: 0.438 INCHES ALL ENDS IN
•
CONNECTION STYLE: FLARED ALL ENDS
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES ALL ENDS IN
•
QUICK DISCONNECT NOMINAL SIZE: 0.438 INCHES ALL ENDS IN
•
CONNECTION TYPE: EXTERNAL QUICK DISCONNECT ALL ENDS
•
MATERIAL: STEEL CORROSION RESISTING BODY
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-763,CL 303,ASIA 303 MIL SPEC SINGLE MATERIAL RESPONSE BODY
THREAD SERIES DESIGNATORUNF ALL ENDS
NOMINAL THREAD SIZE0.438 INCHES ALL ENDS IN
CONNECTION STYLEFLARED ALL ENDS
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES ALL ENDS IN
QUICK DISCONNECT NOMINAL SIZE0.438 INCHES ALL ENDS IN
CONNECTION TYPEEXTERNAL QUICK DISCONNECT ALL ENDS
MATERIALSTEEL CORROSION RESISTING BODY
OVERALL LENGTH2.015 INCHES NOMINAL IN
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
SPHN4-4-56-303Interchangeable
interchangeable cross-reference
interchangeable
4770-3Interchangeable
interchangeable cross-reference
interchangeable
3014731Interchangeable
interchangeable cross-reference
interchangeable
4730PL0970333Interchangeable
Same NIIN cross-reference
interchangeable
SPHN4-4-56Interchangeable
Same NIIN cross-reference
interchangeable
SPHN4-56Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S6PHN4-4-56?
S6PHN4-4-56 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace S6PHN4-4-56?
There are 6 known substitutes for S6PHN4-4-56: SPHN4-4-56-303, 4770-3, 3014731 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S6PHN4-4-56?
S6PHN4-4-56 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-722-3462. 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