PartsTable
Technical Data Sheet
Download PDF

591491 — TUBE ASSEMBLY,METAL

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

591491: TUBE ASSEMBLY,METAL.

The TUBE ASSEMBLY,METAL is a the manufacturer industrial component. Key specifications include end_item_identification: U-2. This part is cataloged in the U.S.

Government catalog under NSN 4710-00-381-5898, 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
591491
NSN: 4710-00-381-5898
NIINs: 003815898, 003822884, 015925890
FSC: 4710 — Pipe, Tube and Rigid Tubing
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
end_item_identificationU-2
NSN4710-00-381-5898
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 591491 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SEAT ANGLE IN DEG: 37.0 SINGLE END
•
DESIGN FORM: PREBENT
•
MATING END QUANTITY: 2 SINGLE END
•
THREAD DIRECTION: RIGHT-HAND SINGLE END
•
NOMINAL THREAD SIZE: 0.562 INCHES SINGLE END IN
•
END CONNECTION STYLE: SWIVEL NUT, FLARE SINGLE END
•
TUBE OUTSIDE DIAMETER: 0.375 INCHES NOMINAL IN
•
THREAD CLASS: 3B SINGLE END
TECHNICAL CHARACTERISTICS
SEAT ANGLE IN DEG37.0 SINGLE END
DESIGN FORMPREBENT
MATING END QUANTITY2 SINGLE END
THREAD DIRECTIONRIGHT-HAND SINGLE END
NOMINAL THREAD SIZE0.562 INCHES SINGLE END IN
END CONNECTION STYLESWIVEL NUT, FLARE SINGLE END
TUBE OUTSIDE DIAMETER0.375 INCHES NOMINAL IN
THREAD CLASS3B SINGLE END
END ITEM IDENTIFICATIONSPERRY GYROSCOPE HYDRAULIC BOOSTER KIT ORDALT 2379
MATERIALALUMINUM ALLOY TUBING
SUBSTITUTES & CROSS-REFERENCES 2
275079Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
687527Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy 591491?
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 591491?
591491 is a TUBE ASSEMBLY,METAL.
What parts can replace 591491?
There are 2 known substitutes for 591491: 275079, 687527. Substitute compatibility should be verified for your specific system.
What is the NSN for 591491?
591491 is cataloged in the U.S. Government catalog under NSN 4710-00-381-5898. 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 — 591491

✓ 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.