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4638K733 — UNION,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4638K733: UNION,PIPE.

The UNION,PIPE is a the manufacturer industrial component. Key specifications include material: IRON MALLEABLE OVERALL, seat_type: GROOVED, connection_type: THREADED INTERNAL PIPE ALL ENDS, style_designator: THREADED. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-481-5508, 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
4638K733
NSN: 4730-01-481-5508
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 4X630 — GUILD ASSOCIATES INC (USA)
SPECIFICATIONS
materialIRON MALLEABLE OVERALL
seat_typeGROOVED
connection_typeTHREADED INTERNAL PIPE ALL ENDS
special_featuresUSE WITH SCHEDULE 40 STEE L NIPPLES AND PIPE. MEET ANSI B16.3 AND FEDERAL SPECIFICATION WW-P-521. PI PE SIZE .5000 INCH. CONNECTION: NPT. IN
style_designatorTHREADED
end_item_identificationCONTRACTOR LOGISTIC SUPPORT MODEL M871, 30-FOOT TRAILER, LAUNDRY ADVANCED SYSTEM (LADDS),NSN: 2330-00-122-6779 CONTRACT DAAK60-97-C-9222 TM 9-3510-122-24P.
NSN4730-01-481-5508
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4638K733 · 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 TYPE: THREADED INTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: THREADED
•
SEAT TYPE: GROOVED
•
MATERIAL: IRON MALLEABLE OVERALL
TECHNICAL CHARACTERISTICS
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATORTHREADED
SEAT TYPEGROOVED
SPECIAL FEATURESUSE WITH SCHEDULE 40 STEE L NIPPLES AND PIPE. MEET ANSI B16.3 AND FEDERAL SPECIFICATION WW-P-521. PI PE SIZE .5000 INCH. CONNECTION: NPT. IN
END ITEM IDENTIFICATIONCONTRACTOR LOGISTIC SUPPORT MODEL M871, 30-FOOT TRAILER, LAUNDRY ADVANCED SYSTEM (LADDS),NSN: 2330-00-122-6779 CONTRACT DAAK60-97-C-9222 TM 9-3510-122-24P.
MATERIALIRON MALLEABLE OVERALL
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4638K733?
4638K733 is a UNION,PIPE.
What is the NSN for 4638K733?
4638K733 is cataloged in the U.S. Government catalog under NSN 4730-01-481-5508. 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.