PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2-6556Adapter,straight,tube to Boss

Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company · NSN 4730-01-502-0893 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-502-0893 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-502-0893. Primary manufacturer part number: 2-6556.
Features
  • Adapter,straight,tube to Boss — FSC 4730
  • Material: STEEL CORROSION RESISTING OVERALL
  • Seat Angle: 45.0 DEGREES FIRST END
  • Nominal Length: 2.000 INCHES FIRST END BULKHEAD IN
  • Nominal Width: 1.000 INCHES SECOND END IN
  • Thread Class: 3A FIRST END A
  • Seat Nominal Radius: 0.31 INCHES FIRST END IN
  • Nominal Thread Size: 0.438 INCHES FIRST END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-502-0893, 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 Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company. Government technical data includes 13 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: Active.

Technical Specifications
ParameterValue
NSN4730-01-502-0893
Primary Part Number2-6556
Item NameAdapter,straight,tube to Boss
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerGraco High Pressure Equipment Inc. Dba High Pressure Equipment Company
StatusACTIVE
MaterialSTEEL CORROSION RESISTING OVERALL
Seat Angle45.0 DEGREES FIRST END
Nominal Length2.000 INCHES FIRST END BULKHEAD IN
Nominal Width1.000 INCHES SECOND END IN
Thread Class3A FIRST END A
Seat Nominal Radius0.31 INCHES FIRST END IN
Nominal Thread Size0.438 INCHES FIRST END IN
Thread Series DesignatorUNF FIRST END
Connection StyleFLARED W/ GASKET SEAL (BOSS) FIRST END
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Operating Pressure72500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Outside Diameter Tube Accommodated0.438 INCHES FIRST END IN
Thread Quantity Per Inch20 FIRST END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5365-00-142-287710288-8 INTERCHANGEABLE
Plug,machine Thread
Cummins Inc.
6615-00-786-699426556 INTERCHANGEABLE
Coil,assembly,synch
Parker-Hannifin Corporation Dba Control Systems Division
2915-00-963-1503102-888 INTERCHANGEABLE
Housing Assy,valve,
Hamilton Sundstrand Corporation
5961-00-971-5651102888 INTERCHANGEABLE
Rectifier,semiconductor Device
L3harris Technologies, Inc Div Space & Airborne Systems
1560-01-714-36562-6556-6 INTERCHANGEABLE
Stiffener,aircraft
The Boeing Company Div Defense
1560-01-714-92822-6556-5 INTERCHANGEABLE
Stiffener,aircraft
The Boeing Company Div Defense
Cross-Reference Index
Part NumberManufacturer
102888 Dh Instruments Inc. (USA)
2-6556 PRIMARY Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company (USA)
Related Parts
5365-00-142-2877INTERCHANGEABLE
PLUG,MACHINE THREAD
10288-8
6615-00-786-6994INTERCHANGEABLE
COIL,ASSEMBLY,SYNCH
26556
2915-00-963-1503INTERCHANGEABLE
HOUSING ASSY,VALVE,
102-888
5961-00-971-5651INTERCHANGEABLE
RECTIFIER,SEMICONDUCTOR DEVICE
102888
1560-01-714-3656INTERCHANGEABLE
STIFFENER,AIRCRAFT
2-6556-6
1560-01-714-9282INTERCHANGEABLE
STIFFENER,AIRCRAFT
2-6556-5

Frequently Asked Questions

What is NSN 4730-01-502-0893?

NSN 4730-01-502-0893 is a Adapter,straight,tube to Boss, manufactured by Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-502-0893?

NSN 4730-01-502-0893 has 2 cross-referenced part numbers: 102888 (Dh Instruments Inc.), 2-6556 (Graco High Pressure Equipment Inc. Dba High Pressure Equipment Company).

What NSN replaces 4730-01-502-0893?

There are 6 known substitutes for 4730-01-502-0893: 5365-00-142-2877, 6615-00-786-6994, 2915-00-963-1503 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2-6556?

Key specifications for 2-6556: Material: STEEL CORROSION RESISTING OVERALL; Seat Angle: 45.0 DEGREES FIRST END; Nominal Length: 2.000 INCHES FIRST END BULKHEAD IN; Nominal Width: 1.000 INCHES SECOND END IN. 16 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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