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21521-6-40 — TEE,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

21521-6-40: TEE,TUBE TO BOSS.

The TEE,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, leg_length: 1.078 INCHES NOMINAL THIRD END IN, seat_angle: 37.0 DEGREES THIRD END, thread_class: 3A ALL ENDS A, connection_style: FLARED (TUBE) FIRST END, special_features: FILTER ELEMENT IN BOSS END. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-005-7425, 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
21521-6-40
NSN: 4730-00-005-7425
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 10989 — PALL AEROPOWER CORP SUB OF PALL CORP MECTRON INDUSTRIES DIV (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
leg_length1.078 INCHES NOMINAL THIRD END IN
seat_angle37.0 DEGREES THIRD END
thread_class3A ALL ENDS A
connection_styleFLARED (TUBE) FIRST END
special_featuresFILTER ELEMENT IN BOSS END
nominal_thread_size0.562 INCHES ALL ENDS IN
thread_series_designatorUNF ALL ENDS
nominal_outside_diameter_tube_accommodated0.375 INCHES THIRD END IN
NSN4730-00-005-7425
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 21521-6-40 · 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) FIRST END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.375 INCHES FIRST END IN
•
LEG LENGTH: 1.078 INCHES NOMINAL THIRD END IN
•
NOMINAL THREAD SIZE: 0.562 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARED (TUBE) FIRST END
CONNECTION STYLEFLARED (TUBE) THIRD END
CONNECTION STYLEDOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES FIRST END IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.375 INCHES THIRD END IN
LEG LENGTH1.078 INCHES NOMINAL THIRD END IN
LEG LENGTH1.062 INCHES NOMINAL FIRST END IN
NOMINAL THREAD SIZE0.562 INCHES ALL ENDS IN
SEAT ANGLE37.0 DEGREES FIRST END
SEAT ANGLE37.0 DEGREES THIRD END
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21521-6-40?
21521-6-40 is a TEE,TUBE TO BOSS.
What is the NSN for 21521-6-40?
21521-6-40 is cataloged in the U.S. Government catalog under NSN 4730-00-005-7425. This indicates validated use in U.S. government and defense supply chains.
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