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Technical Data Sheet
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44555K138 — TEE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

44555K138: TEE,PIPE.

The TEE,PIPE is a the manufacturer industrial component. Key specifications include end_item_identification: 6115-01-561-7455, part_name_assigned_by_controlling_agency: FITTING, TEE 1/4 INCH ID IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-592-8571, 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
44555K138
NSN: 4730-01-592-8571
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
special_featuresMATERIAL: BRASS IAW MANUFACTURERS COMMERCIAL PRACTICE; IDENTIFY IAW MIL-STD-130, METHOD OPTIONAL; INTERPRET DRAWING IAW ASME Y14.100
end_item_identification6115-01-561-7455
part_name_assigned_by_controlling_agencyFITTING, TEE 1/4 INCH ID IN
NSN4730-01-592-8571
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 44555K138 · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESMATERIAL: BRASS IAW MANUFACTURERS COMMERCIAL PRACTICE; IDENTIFY IAW MIL-STD-130, METHOD OPTIONAL; INTERPRET DRAWING IAW ASME Y14.100
PART NAME ASSIGNED BY CONTROLLING AGENCYFITTING, TEE 1/4 INCH ID IN
END ITEM IDENTIFICATION6115-01-561-7455
SUBSTITUTES & CROSS-REFERENCES 2
04-21502Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
10-52917Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 44555K138?
44555K138 is a TEE,PIPE.
What parts can replace 44555K138?
There are 2 known substitutes for 44555K138: 04-21502, 10-52917. Substitute compatibility should be verified for your specific system.
What is the NSN for 44555K138?
44555K138 is cataloged in the U.S. Government catalog under NSN 4730-01-592-8571. 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.