PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

312-4Adapter,straight,tube to Hose

Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division · NSN 4730-00-202-9552 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-202-9552 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-202-9552. Primary manufacturer part number: 312-4.
Features
  • Adapter,straight,tube to Hose — FSC 4730
  • Thread Series Designator: UNF FIRST END
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
  • Nominal Outside Diameter Hose Accommodated: 0.516 INCHES SECOND END IN
  • Furnished Items and Quantity: 1 HOSE SOCKET
  • Nominal Thread Size: 0.438 INCHES FIRST END IN
  • Surface Treatment: CADMIUM INSIDE
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Overall construction
General Description

The Adapter,straight,tube to Hose, cataloged under National Stock Number 4730-00-202-9552, 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 Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-202-9552
Primary Part Number312-4
Item NameAdapter,straight,tube to Hose
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerParker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division
StatusCANCELLED
Thread Series DesignatorUNF FIRST END
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Nominal Outside Diameter Hose Accommodated0.516 INCHES SECOND END IN
Furnished Items and Quantity1 HOSE SOCKET
Nominal Thread Size0.438 INCHES FIRST END IN
Surface TreatmentCADMIUM INSIDE
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Thread Class3B FIRST END
Nominal Thread Size0.438 INCHES FIRST END IN
MaterialSTEEL OVERALL
Connection StyleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
Furnished Items and Quantity1 HOSE SOCKET
Nominal Overall Length2.125 INCHES IN
Nominal Inside Diameter Hose Accommodated0.188 INCHES SECOND END IN
Connection TypeTHREADED EXTERNAL HOSE SECOND END
Connection StyleGRIPPING NIPPLE (NOSE) SECOND END
MaterialSTEEL OVERALL
Nominal Overall Length2.125 INCHES IN
Surface TreatmentCADMIUM OUTSIDE
Nominal Inside Diameter Hose Accommodated0.188 INCHES SECOND END IN
Thread Series DesignatorUNF FIRST END
Nominal Outside Diameter Hose Accommodated0.516 INCHES SECOND END IN
Connection TypeTHREADED INTERNAL TUBE FIRST END
Seat Angle37.0 DEGREES FIRST END
Surface TreatmentCADMIUM OUTSIDE
Surface TreatmentCADMIUM INSIDE
Thread Series DesignatorUNF SECOND END
Thread Series DesignatorUNF SECOND END
Seat Angle37.0 DEGREES FIRST END
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
4730-00-278-8230 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-516-2985 INTERCHANGEABLE
Elbow,swivel Flange to Hose
4730-00-541-2779 INTERCHANGEABLE
Elbow,swivel Flange to Hose
4730-00-842-1138 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-842-2200 INTERCHANGEABLE
Adapter,straight,tube to Hose
Cross-Reference Index
Part NumberManufacturer
312-4 Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division (USA)
MS28740-4 Parker-Hannifin Corporation Dba Pneutronics Div Stratoflex Product Division (USA)
MS28740-4 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MILF5070 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
21C1526-055 General Electric Company (USA)
Related Parts
4730-00-278-8230INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-516-2985INTERCHANGEABLE
ELBOW,SWIVEL FLANGE TO HOSE
4730-00-541-2779INTERCHANGEABLE
ELBOW,SWIVEL FLANGE TO HOSE
4730-00-842-1138INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-842-2200INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE

Frequently Asked Questions

What is NSN 4730-00-202-9552?

NSN 4730-00-202-9552 is a Adapter,straight,tube to Hose, manufactured by Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-202-9552?

NSN 4730-00-202-9552 has 5 cross-referenced part numbers: 312-4 (Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division), MS28740-4 (Parker-Hannifin Corporation Dba Pneutronics Div Stratoflex Product Division), MS28740-4 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MILF5070 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 21C1526-055 (General Electric Company).

What NSN replaces 4730-00-202-9552?

There are 5 known substitutes for 4730-00-202-9552: 4730-00-278-8230, 4730-00-516-2985, 4730-00-541-2779 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 312-4?

Key specifications for 312-4: Thread Series Designator: UNF FIRST END; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN; Nominal Outside Diameter Hose Accommodated: 0.516 INCHES SECOND END IN; Furnished Items and Quantity: 1 HOSE SOCKET. 29 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-202-9552 still in active supply?

NSN 4730-00-202-9552 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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