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590078 — ELBOW,FLANGE TO TUBE

✓ Government record, cited
Buffalo · HOSE FITTING
PRODUCT OVERVIEW

590078: ELBOW,FLANGE TO TUBE.

The ELBOW,FLANGE TO TUBE is a Buffalo industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.0765 INCHES MINIMUM AND 0.0782 INCHES MAXIMUM IN, hole_diameter: 0.789 INCHES MINIMUM AND 0.799 INCHES MAXIMUM IN, hardness_rating: 44.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM, overall_diameter: 1.090 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN, surface_treatment: PHOSPHATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-021-5238, 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
590078
NSN: 4730-00-021-5238
NIINs: 000215238, 012286834
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 11599 — TRIUMPH ENGINE CONTROL SYSTEMS LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.0765 INCHES MINIMUM AND 0.0782 INCHES MAXIMUM IN
hole_diameter0.789 INCHES MINIMUM AND 0.799 INCHES MAXIMUM IN
hardness_rating44.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM
overall_diameter1.090 INCHES MINIMUM AND 1.100 INCHES MAXIMUM IN
surface_treatmentPHOSPHATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationSAE1060-1090 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-021-5238
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 590078 · Buffalo ⚠ 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
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 590078?
590078 is a ELBOW,FLANGE TO TUBE manufactured by Buffalo.
What is the NSN for 590078?
590078 is cataloged in the U.S. Government catalog under NSN 4730-00-021-5238. 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.