PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6533-16-3 ITEM 3Adapter,straight,pipe to Tube

Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect · NSN 4730-00-055-9879 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-055-9879 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-055-9879. Primary manufacturer part number: 6533-16-3 ITEM 3.
Features
  • Adapter,straight,pipe to Tube — FSC 4730
  • Nominal Thread Size: 0.500 INCHES FIRST END IN
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
  • Seat Angle: 45.0 DEGREES FIRST END
  • Nominal Overall Length: 0.953 INCHES IN
  • Material: COPPER ALLOY OVERALL
  • Thread Series Designator: NPT SECOND END
  • Nominal Thread Size: 0.125 INCHES SECOND END IN
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 4730-00-055-9879, 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 Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-055-9879
Primary Part Number6533-16-3 ITEM 3
Item NameAdapter,straight,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerCooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect
StatusACTIVE
Nominal Thread Size0.500 INCHES FIRST END IN
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Seat Angle45.0 DEGREES FIRST END
Nominal Overall Length0.953 INCHES IN
MaterialCOPPER ALLOY OVERALL
Thread Series DesignatorNPT SECOND END
Nominal Thread Size0.125 INCHES SECOND END IN
Furnished Items and Quantity1 SHORT COUPLING NUT AND 2 FERRULE SLEEVE
Thread Series DesignatorUNF FIRST END
Nominal Pipe Size Accommodated0.125 INCHES SECOND END IN
Connection StyleINVERTED FLARE (TUBE) FIRST END
Connection StylePLAIN (PIPE) SECOND END
Thread Class2A FIRST END A
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4730-00-055-987722205764 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Richmond Supply Company Dba Richmond Supply Co
4730-00-588-26874CM4BR INTERCHANGEABLE
Adapter,straight,pipe to Tube
Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
4730-00-691-5444B-810-1-4 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Swagelok Co
4730-00-701-28873MSC2N-B INTERCHANGEABLE
Adapter,straight,pipe to Tube
Parker-Hannifin Corporation Div Instrumentation Products Division
Cross-Reference Index
Part NumberManufacturer
768FB1-4X1-8 Imperial (USA)
6533-16 ITEM 3 Air Dry Co of America, Llc (USA)
6533-16-3 ITEM 3 Air Dry Co of America, Llc (USA)
6533-16-3 ITEM 3 PRIMARY Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect (USA)
768FB Imperial (USA)
6533-16 ITEM 3 Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect (USA)
Related Parts
4730-00-055-9877INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
22205764
4730-00-588-2687INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
4CM4BR
4730-00-691-5444INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
B-810-1-4
4730-00-701-2887INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
3MSC2N-B

Frequently Asked Questions

What is NSN 4730-00-055-9879?

NSN 4730-00-055-9879 is a Adapter,straight,pipe to Tube, manufactured by Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-055-9879?

NSN 4730-00-055-9879 has 6 cross-referenced part numbers: 768FB1-4X1-8 (Imperial), 6533-16 ITEM 3 (Air Dry Co of America, Llc), 6533-16-3 ITEM 3 (Air Dry Co of America, Llc), 6533-16-3 ITEM 3 (Cooper Interconnect, Inc. Dba Cooper Interconnect Div Interconnect), 768FB (Imperial) and 1 more.

What NSN replaces 4730-00-055-9879?

There are 4 known substitutes for 4730-00-055-9879: 4730-00-055-9877, 4730-00-588-2687, 4730-00-691-5444 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6533-16-3 ITEM 3?

Key specifications for 6533-16-3 ITEM 3: Nominal Thread Size: 0.500 INCHES FIRST END IN; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN; Seat Angle: 45.0 DEGREES FIRST END; Nominal Overall Length: 0.953 INCHES IN. 13 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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