PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5520K14Adapter,straight,pipe to Tube

Mcmaster-Carr Supply Co · NSN 4730-01-276-6945 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-276-6945 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-276-6945. Primary manufacturer part number: 5520K14.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Connection Type: UNTHREADED INTERNAL TUBE FIRST END
  • Surface Treatment: COPPER ALLOY OVERALL
  • Connection Style: PLAIN (TUBE) FIRST END
  • Thread Series Designator: NPT SECOND END
  • Connection Type: THREADED EXTERNAL PIPE SECOND END
  • Nominal Pipe Size Accommodated: 1.250 INCHES FIRST END IN
  • Connection Style: PLAIN (PIPE) SECOND END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-01-276-6945, 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 Mcmaster-Carr Supply Co. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-01-276-6945
Primary Part Number5520K14
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMcmaster-Carr Supply Co
StatusCANCELLED
Connection TypeUNTHREADED INTERNAL TUBE FIRST END
Surface TreatmentCOPPER ALLOY OVERALL
Connection StylePLAIN (TUBE) FIRST END
Thread Series DesignatorNPT SECOND END
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Nominal Pipe Size Accommodated1.250 INCHES FIRST END IN
Connection StylePLAIN (PIPE) SECOND END
Nominal Outside Diameter Tube Accommodated1.250 INCHES SECOND END IN
MaterialCOPPER ALLOY OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
4720-00-277-8975B704 INTERCHANGEABLE
Hose,nonmetallic
Carlisle Power Transmission Products Inc
9640-01-032-46516000002 INTERCHANGEABLE
Tube Round,iron
Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
3455-01-045-794116220 INTERCHANGEABLE
Cutter,milling,end
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
4820-01-138-2021C404 INTERCHANGEABLE
Stem,fluid Valve
Hunt Valve Company, Inc.
5910-01-371-3441 INTERCHANGEABLE
Capacitor,variable,mica Dielectr
5120-01-434-9225 INTERCHANGEABLE
Clamp,c
Cross-Reference Index
Part NumberManufacturer
5520K14 PRIMARY Mcmaster-Carr Supply Co (USA)
C404 Gage Co the (USA)
Related Parts
4720-00-277-8975INTERCHANGEABLE
HOSE,NONMETALLIC
B704
9640-01-032-4651INTERCHANGEABLE
TUBE ROUND,IRON
6000002
3455-01-045-7941INTERCHANGEABLE
CUTTER,MILLING,END
16220
4820-01-138-2021INTERCHANGEABLE
STEM,FLUID VALVE
C404
5910-01-371-3441INTERCHANGEABLE
CAPACITOR,VARIABLE,MICA DIELECTR
5120-01-434-9225INTERCHANGEABLE
CLAMP,C

Frequently Asked Questions

What is NSN 4730-01-276-6945?

NSN 4730-01-276-6945 is a Adapter,straight,pipe to Tube, manufactured by Mcmaster-Carr Supply Co, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-01-276-6945?

NSN 4730-01-276-6945 has 2 cross-referenced part numbers: 5520K14 (Mcmaster-Carr Supply Co), C404 (Gage Co the).

What NSN replaces 4730-01-276-6945?

There are 6 known substitutes for 4730-01-276-6945: 4720-00-277-8975, 9640-01-032-4651, 3455-01-045-7941 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5520K14?

Key specifications for 5520K14: Connection Type: UNTHREADED INTERNAL TUBE FIRST END; Surface Treatment: COPPER ALLOY OVERALL; Connection Style: PLAIN (TUBE) FIRST END; Thread Series Designator: NPT SECOND END. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-01-276-6945 still in active supply?

NSN 4730-01-276-6945 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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