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Technical Data Sheet
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01789 — TEE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

01789: TEE,PIPE.

The TEE,PIPE is a the manufacturer industrial component. Key specifications include nominal_pipe_size_accommodated: 1.000 INCHES ALL ENDS IN, part_name_assigned_by_controlling_agency: PIPE TEE. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-644-9122, 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
01789
NSN: 4730-01-644-9122
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0K7M2 — CLEMCO INDUSTRIES CORP. DBA CLEMCO INDUSTRIES CORP DIV CLEMCO (USA)
SPECIFICATIONS
nominal_pipe_size_accommodated1.000 INCHES ALL ENDS IN
part_name_assigned_by_controlling_agencyPIPE TEE
NSN4730-01-644-9122
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 01789 · 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
•
NOMINAL PIPE SIZE ACCOMMODATED: 1.000 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE ACCOMMODATED1.000 INCHES ALL ENDS IN
PART NAME ASSIGNED BY CONTROLLING AGENCYPIPE TEE
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
44605K156Reference document
Same NSN cross-reference
Reference document — Secondary 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 01789?
01789 is a TEE,PIPE.
What parts can replace 01789?
There is 1 known substitute for 01789: 44605K156. Substitute compatibility should be verified for your specific system.
What is the NSN for 01789?
01789 is cataloged in the U.S. Government catalog under NSN 4730-01-644-9122. 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.