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7M638S6 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

7M638S6: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING BODY, thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION, connection_style: COMPRESSION ALL ENDS, style_designator: MALE COUPLING HALF, nominal_thread_size: 0.562 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-194-7953, 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
7M638S6
NSN: 4730-01-194-7953
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
connection_styleCOMPRESSION ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.562 INCHES ALL ENDS IN
quick_disconnect_methodQUICK LEAD THREAD ALL ENDS
thread_series_designatorUNF ALL ENDS
quick_disconnect_nominal_size0.375 INCHES ALL ENDS IN
nominal_outside_diameter_tube_accommodated0.375 INCHES ALL ENDS IN
NSN4730-01-194-7953
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7M638S6 · 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
•
CONNECTION STYLE: COMPRESSION ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.375 INCHES ALL ENDS IN
•
QUICK DISCONNECT NOMINAL SIZE: 0.375 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.562 INCHES ALL ENDS IN
•
THREAD CLASS: 2A ALL ENDS A
TECHNICAL CHARACTERISTICS
CONNECTION STYLECOMPRESSION ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES ALL ENDS IN
QUICK DISCONNECT NOMINAL SIZE0.375 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.562 INCHES ALL ENDS IN
THREAD CLASS2A ALL ENDS A
MATERIALSTEEL CORROSION RESISTING BODY
QUICK DISCONNECT METHODQUICK LEAD THREAD ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 1
7M638Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7M638S6?
7M638S6 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 7M638S6?
There is 1 known substitute for 7M638S6: 7M638. Substitute compatibility should be verified for your specific system.
What is the NSN for 7M638S6?
7M638S6 is cataloged in the U.S. Government catalog under NSN 4730-01-194-7953. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.