PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-83798CAdapter,straight,tube to Hose

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4730-00-720-1171 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-720-1171 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-720-1171. Primary manufacturer part number: MIL-DTL-83798C.
Features
  • Adapter,straight,tube to Hose — FSC 4730
  • Nominal Thread Size: 1.875 INCHES FIRST END IN
  • Nominal Overall Length: 3.550 INCHES IN
  • Connection Style: GRIPPING NIPPLE (NOSE) SECOND END
  • Seat Angle: 37.0 DEGREES FIRST END
  • Surface Treatment: ANODIZE INSIDE
  • Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
  • Surface Treatment: ANODIZE OUTSIDE
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Aluminum Alloy Overall construction
General Description

The Adapter,straight,tube to Hose, cataloged under National Stock Number 4730-00-720-1171, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 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
NSN4730-00-720-1171
Primary Part NumberMIL-DTL-83798C
Item NameAdapter,straight,tube to Hose
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Nominal Thread Size1.875 INCHES FIRST END IN
Nominal Overall Length3.550 INCHES IN
Connection StyleGRIPPING NIPPLE (NOSE) SECOND END
Seat Angle37.0 DEGREES FIRST END
Surface TreatmentANODIZE INSIDE
Thread Series DesignatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
Surface TreatmentANODIZE OUTSIDE
Nominal Outside Diameter Hose Accommodated1.672 INCHES SECOND END IN
Connection TypeTHREADED EXTERNAL HOSE GRIPPING SECOND END
Connection TypeTHREADED INTERNAL TUBE FIRST END
Nominal Outside Diameter Tube Accommodated1.500 INCHES FIRST END IN
Nominal Inside Diameter Hose Accommodated1.375 INCHES SECOND END IN
Thread Class3B FIRST END
MaterialALUMINUM ALLOY OVERALL
Furnished Items and Quantity1 LONG COUPLING NUT
Connection StyleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4730-00-541-1957 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-585-6210 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-585-6212 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-585-7496 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-613-1859 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-618-7378 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-632-2002 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-817-1864 INTERCHANGEABLE
Elbow,tube to Hose
4730-00-834-5456 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-00-891-09718844-24D INTERCHANGEABLE
Connector,swivel Flange to Hose
Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-83798C Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
816-24D Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA)
MIL-DTL-83798/1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-F-83798 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
136-1000-24D Hydrasearch Company, Llc (USA)
136-1000-24D Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company (USA)
M83798/1-24 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
676-24D Parker Hannifin Corp Dba Pneutronics Div Stratoflex Products Division (USA)
Related Parts
4730-00-541-1957INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-585-6210INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-585-6212INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-585-7496INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-613-1859INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-618-7378INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-632-2002INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-817-1864INTERCHANGEABLE
ELBOW,TUBE TO HOSE
4730-00-834-5456INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-891-0971INTERCHANGEABLE
CONNECTOR,SWIVEL FLANGE TO HOSE
8844-24D
4730-00-936-2364INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-00-936-2365INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE

Frequently Asked Questions

What is NSN 4730-00-720-1171?

NSN 4730-00-720-1171 is a Adapter,straight,tube to Hose, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-720-1171?

NSN 4730-00-720-1171 has 8 cross-referenced part numbers: MIL-DTL-83798C (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 816-24D (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), MIL-DTL-83798/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-F-83798 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 136-1000-24D (Hydrasearch Company, Llc) and 3 more.

What NSN replaces 4730-00-720-1171?

There are 12 known substitutes for 4730-00-720-1171: 4730-00-541-1957, 4730-00-585-6210, 4730-00-585-6212 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-83798C?

Key specifications for MIL-DTL-83798C: Nominal Thread Size: 1.875 INCHES FIRST END IN; Nominal Overall Length: 3.550 INCHES IN; Connection Style: GRIPPING NIPPLE (NOSE) SECOND END; Seat Angle: 37.0 DEGREES FIRST END. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-720-1171 still in active supply?

NSN 4730-00-720-1171 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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