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3-H-8 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3-H-8: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: STEEL BODY, thread_class: 2B ALL ENDS, overall_length: 2.750 INCHES NOMINAL IN, connection_type: INTERNAL QUICK DISCONNECT ALL ENDS, connection_style: BOSS GASKET SEAL ALL ENDS, special_features: WEAPON SYSTEM ESSENTIAL. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-106-4031, 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
3-H-8
NSN: 4730-01-106-4031
NIINs: 011064031, 014786897
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 73992 — TUTHILL CORP HANSEN COUPLING DIV (USA)
SPECIFICATIONS
materialSTEEL BODY
thread_class2B ALL ENDS
overall_length2.750 INCHES NOMINAL IN
connection_typeINTERNAL QUICK DISCONNECT ALL ENDS
connection_styleBOSS GASKET SEAL ALL ENDS
special_featuresWEAPON SYSTEM ESSENTIAL
style_designatorMALE COUPLING HALF
surface_treatmentCADMIUM BODY
nominal_thread_size0.750 INCHES ALL ENDS IN
end_item_identificationSUPPORT EQUIPMENT, B-1 AIRCRAFT;NIMITZ CLASS CVN;AIRCRAFT, B-1B
quick_disconnect_methodPUSH-PULL ALL ENDS
thread_series_designatorUNF ALL ENDS
NSN4730-01-106-4031
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3-H-8 · 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: BOSS GASKET SEAL ALL ENDS
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
CONNECTION TYPE: THREADED INTERNAL BOSS FIRST FLUID END CONNECTION
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
QUICK DISCONNECT NOMINAL SIZE: 0.750 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEBOSS GASKET SEAL ALL ENDS
CRITICALITY CODE JUSTIFICATIONFEAT
CONNECTION TYPETHREADED INTERNAL BOSS FIRST FLUID END CONNECTION
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH2.750 INCHES NOMINAL IN
QUICK DISCONNECT NOMINAL SIZE0.750 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
SURFACE TREATMENTCADMIUM BODY
SUBSTITUTES & CROSS-REFERENCES 1
746336-1Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3-H-8?
3-H-8 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 3-H-8?
There is 1 known substitute for 3-H-8: 746336-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 3-H-8?
3-H-8 is cataloged in the U.S. Government catalog under NSN 4730-01-106-4031. 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.