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Technical Data Sheet
PartsTable / COMPONENT / 4WTXWLNSS
4WTXWLNSS ✓ 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,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, seat_angle: 37.0 DEGREES FIRST END, thread_class: 2A FIRST END BULKHEAD A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: FLARED (TUBE) FIRST END, style_designator: FLARED W/ BULKHEAD THREAD. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-226-6770, 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
4WTXWLNSS
NSN: 4730-00-226-6770
FSC: 4730
CAGE: 98441 — PARKER HANNIFIN CORP DBA PNEUTRONICS DIV STRATOFLEX PRODUCTS DIVISION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
seat_angle37.0 DEGREES FIRST END
thread_class2A FIRST END BULKHEAD A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_styleFLARED (TUBE) FIRST END
style_designatorFLARED W/ BULKHEAD THREAD
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.438 INCHES FIRST END IN
nominal_overall_length2.080 INCHES IN
thread_series_designatorUNF FIRST END
furnished_items_and_quantity1 LOCKNUT
nominal_outside_diameter_tube_accommodated0.250 INCHES FIRST END IN
NSN4730-00-226-6770
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4WTXWLNSS · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
C6678Interchangeable
interchangeable cross-reference
interchangeable
C6678.001.130Interchangeable
interchangeable cross-reference
interchangeable
9521 PIECE 1Interchangeable
interchangeable cross-reference
interchangeable
9521Interchangeable
interchangeable cross-reference
interchangeable
4WTXWLNSSInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-18866Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4WTXWLNSS?
4WTXWLNSS is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 4WTXWLNSS?
There are 13 known substitutes for 4WTXWLNSS: C6678, C6678.001.130, 9521 PIECE 1 and 10 more. Substitute compatibility should be verified for your specific system.
Is 4WTXWLNSS still available?
4WTXWLNSS is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026