PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B16.18Coupling,tube

The American Society of Mechanical Engineers · NSN 4730-00-059-7220 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-059-7220 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-059-7220. Primary manufacturer part number: B16.18.
Features
  • Coupling,tube — FSC 4730
  • Connection Style: SOCKET (TUBE) FIRST END
  • Nominal Outside Diameter Tube Accommodated: 0.6245 INCHES FIRST END IN
  • Material Document and Classification: ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B145,ALLOY 4B ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Material: COPPER ALLOY OVERALL
  • Tubing Wall Nominal Thickness for Which Designed: 0.0395 INCHES FIRST END IN
  • 2 verified cross-references
  • Primary manufacturer: The American Society of Mechanical Engineers
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Coupling,tube, cataloged under National Stock Number 4730-00-059-7220, 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 The American Society of Mechanical Engineers. Government technical data includes 5 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-059-7220
Primary Part NumberB16.18
Item NameCoupling,tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerThe American Society of Mechanical Engineers
StatusACTIVE
Connection StyleSOCKET (TUBE) FIRST END
Nominal Outside Diameter Tube Accommodated0.6245 INCHES FIRST END IN
Material Document and ClassificationASTM B62 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B145,ALLOY 4B ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MaterialCOPPER ALLOY OVERALL
Tubing Wall Nominal Thickness for Which Designed0.0395 INCHES FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4730-00-202-8416 INTERCHANGEABLE
Elbow,pipe to Tube
4730-00-289-4825 INTERCHANGEABLE
Coupling,tube
4730-00-328-5229B16.18 1 1/4X1X3/4 INTERCHANGEABLE
Tee,tube
The American Society of Mechanical Engineers
4730-00-614-6051 INTERCHANGEABLE
Tee,pipe to Tube
4730-00-689-8534 INTERCHANGEABLE
Adapter,straight,pipe to Tube
4730-00-816-0764A1511 INTERCHANGEABLE
Tee,tube
Mueller Brass Co.
4730-00-841-8431 INTERCHANGEABLE
Elbow,pipe to Tube
4730-00-857-5387 INTERCHANGEABLE
Elbow,pipe to Tube
4730-00-857-5389 INTERCHANGEABLE
Elbow,pipe to Tube
4730-01-013-6131A1620 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Mueller Brass Co.
Cross-Reference Index
Part NumberManufacturer
B16.18 The American Society of Mechanical Engineers (USA)
B16-18-1950TABLE5 American National Standards Institute Incorporated Dba American National Standards Institute (USA)
Related Parts
4730-00-202-8416INTERCHANGEABLE
ELBOW,PIPE TO TUBE
4730-00-289-4825INTERCHANGEABLE
COUPLING,TUBE
4730-00-328-5229INTERCHANGEABLE
TEE,TUBE
B16.18 1 1/4X1X3/4
4730-00-614-6051INTERCHANGEABLE
TEE,PIPE TO TUBE
4730-00-689-8534INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
4730-00-816-0764INTERCHANGEABLE
TEE,TUBE
A1511
4730-00-841-8431INTERCHANGEABLE
ELBOW,PIPE TO TUBE
4730-00-857-5387INTERCHANGEABLE
ELBOW,PIPE TO TUBE
4730-00-857-5389INTERCHANGEABLE
ELBOW,PIPE TO TUBE
4730-01-013-6131INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
A1620
4730-01-016-3007INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
4730-01-221-3186INTERCHANGEABLE
ELBOW,PIPE TO TUBE
714606-1

Frequently Asked Questions

What is NSN 4730-00-059-7220?

NSN 4730-00-059-7220 is a Coupling,tube, manufactured by The American Society of Mechanical Engineers, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-059-7220?

NSN 4730-00-059-7220 has 2 cross-referenced part numbers: B16.18 (The American Society of Mechanical Engineers), B16-18-1950TABLE5 (American National Standards Institute Incorporated Dba American National Standards Institute).

What NSN replaces 4730-00-059-7220?

There are 12 known substitutes for 4730-00-059-7220: 4730-00-202-8416, 4730-00-289-4825, 4730-00-328-5229 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B16.18?

Key specifications for B16.18: Connection Style: SOCKET (TUBE) FIRST END; Nominal Outside Diameter Tube Accommodated: 0.6245 INCHES FIRST END IN; Material Document and Classification: ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B145,ALLOY 4B ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Material: COPPER ALLOY OVERALL. 5 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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