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Technical Data Sheet
PartsTable / COMPONENT / 721-70638598-44
721-70638598-44 ✓ 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: NICKEL ALLOY BODY, style_designator: MALE COUPLING HALF, nominal_thread_size: 0.375 INCHES ALL ENDS IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-273-1318, 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
721-70638598-44
NSN: 4730-01-273-1318
FSC: 4730
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY BODY
style_designatorMALE COUPLING HALF
nominal_thread_size0.375 INCHES ALL ENDS IN
NSN4730-01-273-1318
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 721-70638598-44 · 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
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
NOMINAL THREAD SIZE: 0.375 INCHES ALL ENDS IN
•
MATERIAL: NICKEL ALLOY BODY
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORMALE COUPLING HALF
NOMINAL THREAD SIZE0.375 INCHES ALL ENDS IN
MATERIALNICKEL ALLOY BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
5168Interchangeable
interchangeable cross-reference
interchangeable
XCKN2145P20Interchangeable
interchangeable cross-reference
interchangeable
T-5168Interchangeable
interchangeable cross-reference
interchangeable
ABT5168Interchangeable
interchangeable cross-reference
interchangeable
5168-5Interchangeable
interchangeable cross-reference
interchangeable
1056078Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 721-70638598-44?
721-70638598-44 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 721-70638598-44?
There are 14 known substitutes for 721-70638598-44: 5168, XCKN2145P20, T-5168 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 721-70638598-44?
721-70638598-44 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-273-1318. 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