PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

T0556Hose Assembly,metallic

Drs Environmental Systems Inc · NSN 4720-00-684-4048 · FSC 4720 · No Item Name Available
Verified by PartsTable
NSN 4720-00-684-4048 — this item is cataloged by the U.S. Government under National Stock Number 4720-00-684-4048. Primary manufacturer part number: T0556.
Features
  • Hose Assembly,metallic — FSC 4720
  • Thread Direction: RIGHT-HAND FIRST END
  • Connection Style: SWIVEL NUT FLARE FIRST END
  • End Connection Design: STRAIGHT FIRST END
  • Inside Diameter: 0.188 INCHES NOMINAL IN
  • Thread Class: 3B FIRST END
  • Thread Series Designator: NPT SECOND END
  • Seat Angle: 37.0 DEGREES FIRST END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Hose Assembly,metallic, cataloged under National Stock Number 4720-00-684-4048, is classified within Federal Supply Class 4720 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Drs Environmental Systems Inc. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4720-00-684-4048
Primary Part NumberT0556
Item NameHose Assembly,metallic
FSC / FSG4720 / 47 — No Item Name Available
ManufacturerDrs Environmental Systems Inc
StatusCANCELLED
Thread DirectionRIGHT-HAND FIRST END
Connection StyleSWIVEL NUT FLARE FIRST END
End Connection DesignSTRAIGHT FIRST END
Inside Diameter0.188 INCHES NOMINAL IN
Thread Class3B FIRST END
Thread Series DesignatorNPT SECOND END
Seat Angle37.0 DEGREES FIRST END
Thread Series DesignatorUNF FIRST END
Inner Conveying Tube StyleANNULAR CLOSE-PITCH CORRUGATED
Nominal Thread Size0.438 INCHES FIRST END IN
Connection StylePLAIN SECOND END
Layer Composition and LocationOUTER LAYER BRAIDED BRONZE WIRE
Connection TypeTHREADED INTERNAL TUBE FIRST END
Nominal Thread Size0.125 INCHES SECOND END IN
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Thread DirectionRIGHT-HAND SECOND END
End Connection DesignSTRAIGHT SECOND END
Measuring Method and Length38.500 INCHES NOMINAL OVERALL IN
Exterior ColorRED
Outside Diameter0.344 INCHES NOMINAL IN
Cross-Sectional Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-132-22631383 INTERCHANGEABLE
Transformer,power
Precision Electronics, Inc
5305-00-297-8043 INTERCHANGEABLE
Screw,machine
5340-00-346-0049138-3 INTERCHANGEABLE
Screw,piston
Emhart Industries Inc Corbin Cabinet Lock Hardware Div
6240-00-539-9659 INTERCHANGEABLE
Lamp,incandescent
6240-00-683-0329S55B INTERCHANGEABLE
Lamp,flashtube
Amglo Kemlite Laboratories, Inc. Div Xenon
5999-00-729-7273 INTERCHANGEABLE
Shielding Gasket,electronic
5950-00-838-45311-383 INTERCHANGEABLE
Transformer,power
Eldec Aerospace Corp
5999-01-026-83411383 INTERCHANGEABLE
Data Grid Modification
Leidos, Inc. Div Cyber and Information Solutions Services
5340-01-169-44051383 INTERCHANGEABLE
Plug,expansion
Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.
4820-01-238-53281383 INTERCHANGEABLE
Valve,safety Relief
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
T0556 Drs Environmental Systems Inc (USA)
698-T0556 Wheeler Fleet Solutions, Co. (USA)
T0556 Engineered Air Systems, Inc. Dba Drs Sustainment Systems (USA)
1383 Page Chester Ltd Dba Cooperative Industries Div Cooperative Industries Aerospace Defense (USA)
Related Parts
5950-00-132-2263INTERCHANGEABLE
TRANSFORMER,POWER
1383
5305-00-297-8043INTERCHANGEABLE
SCREW,MACHINE
5340-00-346-0049INTERCHANGEABLE
SCREW,PISTON
138-3
6240-00-539-9659INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-683-0329INTERCHANGEABLE
LAMP,FLASHTUBE
S55B
5999-00-729-7273INTERCHANGEABLE
SHIELDING GASKET,ELECTRONIC
5950-00-838-4531INTERCHANGEABLE
TRANSFORMER,POWER
1-383
5999-01-026-8341INTERCHANGEABLE
DATA GRID MODIFICATION
1383
5340-01-169-4405INTERCHANGEABLE
PLUG,EXPANSION
1383
4820-01-238-5328INTERCHANGEABLE
VALVE,SAFETY RELIEF
1383
5365-01-289-5021INTERCHANGEABLE
SHIM
1383
5120-01-399-9279INTERCHANGEABLE
HAMMER,HAND
1383

Frequently Asked Questions

What is NSN 4720-00-684-4048?

NSN 4720-00-684-4048 is a Hose Assembly,metallic, manufactured by Drs Environmental Systems Inc, classified under FSC 4720 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4720-00-684-4048?

NSN 4720-00-684-4048 has 4 cross-referenced part numbers: T0556 (Drs Environmental Systems Inc), 698-T0556 (Wheeler Fleet Solutions, Co.), T0556 (Engineered Air Systems, Inc. Dba Drs Sustainment Systems), 1383 (Page Chester Ltd Dba Cooperative Industries Div Cooperative Industries Aerospace Defense).

What NSN replaces 4720-00-684-4048?

There are 12 known substitutes for 4720-00-684-4048: 5950-00-132-2263, 5305-00-297-8043, 5340-00-346-0049 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of T0556?

Key specifications for T0556: Thread Direction: RIGHT-HAND FIRST END; Connection Style: SWIVEL NUT FLARE FIRST END; End Connection Design: STRAIGHT FIRST END; Inside Diameter: 0.188 INCHES NOMINAL IN. 22 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4720-00-684-4048 still in active supply?

NSN 4720-00-684-4048 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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