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4037T91 — TEE,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4037T91: TEE,TUBE.

The TEE,TUBE is a the manufacturer industrial component. Key specifications include seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A THIRD END A, connection_style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END, nominal_thread_size: 0.500 INCHES FIRST END IN, thread_series_designator: UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END, nominal_outside_diameter_tube_accommodated: 0.312 INCHES SECOND END IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-092-5573, 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
4037T91
NSN: 4730-00-092-5573
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 99207 — GENERAL ELECTRIC COMPANY DBA GE AEROSPACE (USA)
SPECIFICATIONS
seat_angle37.0 DEGREES FIRST END
thread_class3A THIRD END A
connection_styleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
nominal_thread_size0.500 INCHES FIRST END IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
nominal_outside_diameter_tube_accommodated0.312 INCHES SECOND END IN
NSN4730-00-092-5573
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4037T91 · 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: FLARED (TUBE) SECOND END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.312 INCHES FIRST END IN
•
NOMINAL THREAD SIZE: 0.500 INCHES FIRST END IN
•
SEAT ANGLE: 37.0 DEGREES FIRST END
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARED (TUBE) SECOND END
CONNECTION STYLESWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
CONNECTION STYLEFLARED (TUBE) THIRD END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.312 INCHES FIRST END IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.312 INCHES SECOND END IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.188 INCHES THIRD END IN
NOMINAL THREAD SIZE0.500 INCHES FIRST END IN
SEAT ANGLE37.0 DEGREES FIRST END
THREAD CLASS3A SECOND END A
THREAD CLASS3A THIRD END A
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
4037T91P01Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 4037T91?
4037T91 is a TEE,TUBE.
What parts can replace 4037T91?
There is 1 known substitute for 4037T91: 4037T91P01. Substitute compatibility should be verified for your specific system.
What is the NSN for 4037T91?
4037T91 is cataloged in the U.S. Government catalog under NSN 4730-00-092-5573. This indicates validated use in U.S. government and defense supply chains.
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