PartsTable
Technical Data Sheet
Download PDF

U539972 — OUTLET,BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

U539972: OUTLET,BOSS.

The OUTLET,BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, thread_class: 3B SECOND END, connection_type: BUTT WELD PIPE FIRST END, connection_style: GASKET SEAL (BOSS) SECOND END, style_designator: PLAIN, mounting_end_type: FLAT. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-374-7128, 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
U539972
NSN: 4730-01-374-7128
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78943 — TRIUMPH THERMAL SYSTEMS, LLC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
thread_class3B SECOND END
connection_typeBUTT WELD PIPE FIRST END
connection_styleGASKET SEAL (BOSS) SECOND END
style_designatorPLAIN
mounting_end_typeFLAT
nominal_thread_size0.563 INCHES SECOND END IN
nominal_overall_length1.063 INCHES IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) SECOND END
material_document_and_classificationAMS 4150 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-01-374-7128
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: U539972 · 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
•
MOUNTING END TYPE: FLAT
•
CONNECTION STYLE: BEVELED (PIPE) FIRST END
•
NOMINAL OVERALL LENGTH: 1.063 INCHES IN
•
CONNECTION TYPE: BUTT WELD PIPE FIRST END
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 4150 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
MOUNTING END TYPEFLAT
CONNECTION STYLEBEVELED (PIPE) FIRST END
CONNECTION STYLEGASKET SEAL (BOSS) SECOND END
NOMINAL OVERALL LENGTH1.063 INCHES IN
CONNECTION TYPEBUTT WELD PIPE FIRST END
CONNECTION TYPETHREADED INTERNAL BOSS SECOND END
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 4150 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE0.563 INCHES SECOND END IN
THREAD CLASS3B SECOND 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: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy U539972?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is U539972?
U539972 is a OUTLET,BOSS.
What is the NSN for U539972?
U539972 is cataloged in the U.S. Government catalog under NSN 4730-01-374-7128. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — U539972

✓ 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.