PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

259338Ferrule,brazing,tube Fitting

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 4730-00-203-4745 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-203-4745 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-203-4745. Primary manufacturer part number: 259338.
Features
  • Ferrule,brazing,tube Fitting — FSC 4730
  • Seat Angle in Deg: 37.0
  • Metallic Hardness Rating: 20.0 MINIMUM ROCKWELL C AND 28.0 MAXIMUM ROCKWELL C
  • Flange Width: 0.160 INCHES NOMINAL IN
  • Style Designator: FLARE
  • Surface Treatment: PASSIVATE
  • Material: STEEL COMP 316F
  • Flange Outside Diameter: 0.3815 INCHES NOMINAL IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Comp 316f construction
General Description

The Ferrule,brazing,tube Fitting, cataloged under National Stock Number 4730-00-203-4745, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-203-4745
Primary Part Number259338
Item NameFerrule,brazing,tube Fitting
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusCANCELLED
Seat Angle in Deg37.0
Metallic Hardness Rating20.0 MINIMUM ROCKWELL C AND 28.0 MAXIMUM ROCKWELL C
Flange Width0.160 INCHES NOMINAL IN
Style DesignatorFLARE
Surface TreatmentPASSIVATE
MaterialSTEEL COMP 316F
Flange Outside Diameter0.3815 INCHES NOMINAL IN
Sleeve Outside Diameter0.2955 INCHES NOMINAL IN
Casehardening IndicatorNOT CASEHARDENED
Hose/tube Outside Diameter for Which Designed0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
6210-00-193-7255616318-38 INTERCHANGEABLE
Lens,light
Naval Air Warfare Center Aircraft Division Joint Base Jbmdl
5365-01-510-742758149 INTERCHANGEABLE
Spacer,ring
Flowserve Inc
Cross-Reference Index
Part NumberManufacturer
259338 Cooper Industries Inc Cooper Petroleum Equipment Div Sunnyvale Operation (USA)
259338 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
259338 Turbo Power & Marine System Inc Sub of United Technologies Corp (USA)
Related Parts
6210-00-193-7255INTERCHANGEABLE
LENS,LIGHT
616318-38
5365-01-510-7427INTERCHANGEABLE
SPACER,RING
58149

Frequently Asked Questions

What is NSN 4730-00-203-4745?

NSN 4730-00-203-4745 is a Ferrule,brazing,tube Fitting, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-203-4745?

NSN 4730-00-203-4745 has 3 cross-referenced part numbers: 259338 (Cooper Industries Inc Cooper Petroleum Equipment Div Sunnyvale Operation), 259338 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 259338 (Turbo Power & Marine System Inc Sub of United Technologies Corp).

What NSN replaces 4730-00-203-4745?

There are 2 known substitutes for 4730-00-203-4745: 6210-00-193-7255, 5365-01-510-7427. Verify interchangeability with system specifications before substitution.

What are the specifications of 259338?

Key specifications for 259338: Seat Angle in Deg: 37.0; Metallic Hardness Rating: 20.0 MINIMUM ROCKWELL C AND 28.0 MAXIMUM ROCKWELL C; Flange Width: 0.160 INCHES NOMINAL IN; Style Designator: FLARE. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-203-4745 still in active supply?

NSN 4730-00-203-4745 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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