PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3670321-1Tube Assembly,metal

Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix · NSN 4710-01-377-4346 · FSC 4710 · No Item Name Available
Verified by PartsTable
NSN 4710-01-377-4346 — this item is cataloged by the U.S. Government under National Stock Number 4710-01-377-4346. Primary manufacturer part number: 3670321-1.
Features
  • Tube Assembly,metal — FSC 4710
  • Material: STEEL COMP 304 TUBING
  • Design Form: STRAIGHT
  • Mating End Quantity: 2 SINGLE END
  • Nominal Thread Size: 0.438 INCHES SINGLE END IN
  • Thread Class: 2B SINGLE END
  • Material Document and Classification: MIL-T-8504, COMP 304 MIL SPEC SINGLE MATERIAL RESPONSE TUBING
  • End Connection Style: SWIVEL NUT WITH COMPRESSION SLEEVE SINGLE END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Comp 304 Tubing construction
General Description

The Tube Assembly,metal, cataloged under National Stock Number 4710-01-377-4346, is classified within Federal Supply Class 4710 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4710-01-377-4346
Primary Part Number3670321-1
Item NameTube Assembly,metal
FSC / FSG4710 / 47 — No Item Name Available
ManufacturerHoneywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
StatusACTIVE
MaterialSTEEL COMP 304 TUBING
Design FormSTRAIGHT
Mating End Quantity2 SINGLE END
Nominal Thread Size0.438 INCHES SINGLE END IN
Thread Class2B SINGLE END
Material Document and ClassificationMIL-T-8504, COMP 304 MIL SPEC SINGLE MATERIAL RESPONSE TUBING
End Connection StyleSWIVEL NUT WITH COMPRESSION SLEEVE SINGLE END
Seat Angle in Deg30.0 SINGLE END
Tube Outside Diameter0.250 INCHES NOMINAL IN
MaterialSTEEL CORROSION RESISTING SINGLE END
Thread Series DesignatorUNF SINGLE END
Thread DirectionRIGHT-HAND SINGLE END
End Connection Spec/stdMIL, MS51531, PART NO. MS51531B6S AND MIL, MS51533, PART NO. MS51533B6S
Wall Thickness0.065 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5330-01-014-1756367032-1 INTERCHANGEABLE
Gasket
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
Cross-Reference Index
Part NumberManufacturer
3670321-1 PRIMARY Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
3670321 Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix (USA)
Related Parts
5330-01-014-1756INTERCHANGEABLE
GASKET
367032-1

Frequently Asked Questions

What is NSN 4710-01-377-4346?

NSN 4710-01-377-4346 is a Tube Assembly,metal, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix, classified under FSC 4710 (No Item Name Available). Status: active.

What are the part numbers for NSN 4710-01-377-4346?

NSN 4710-01-377-4346 has 2 cross-referenced part numbers: 3670321-1 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix), 3670321 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix).

What NSN replaces 4710-01-377-4346?

There is 1 known substitute for 4710-01-377-4346: 5330-01-014-1756. Verify interchangeability with system specifications before substitution.

What are the specifications of 3670321-1?

Key specifications for 3670321-1: Material: STEEL COMP 304 TUBING; Design Form: STRAIGHT; Mating End Quantity: 2 SINGLE END; Nominal Thread Size: 0.438 INCHES SINGLE END IN. 15 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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