PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

205-8-4Nut,tube Coupling,reducing

Lenz Inc Dba the Lenz Company · NSN 4730-00-650-2184 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-650-2184 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-650-2184. Primary manufacturer part number: 205-8-4.
Features
  • Nut,tube Coupling,reducing — FSC 4730
  • Length to Shoulder: 0.750 INCHES NOMINAL IN
  • Nominal Thread Size: 0.878 INCHES IN
  • Thread Direction: RIGHT-HAND
  • Thread Series: UNF
  • Thread Quantity Per Inch: 14
  • Nut Height: 0.937 INCHES NOMINAL IN
  • Surface Treatment: PHOSPHATE OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Fluid conveyance
  • Hydraulic system plumbing
General Description

The Nut,tube Coupling,reducing, cataloged under National Stock Number 4730-00-650-2184, 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 Lenz Inc Dba the Lenz Company. Government technical data includes 15 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-650-2184
Primary Part Number205-8-4
Item NameNut,tube Coupling,reducing
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerLenz Inc Dba the Lenz Company
StatusACTIVE
Length to Shoulder0.750 INCHES NOMINAL IN
Nominal Thread Size0.878 INCHES IN
Thread DirectionRIGHT-HAND
Thread SeriesUNF
Thread Quantity Per Inch14
Nut Height0.937 INCHES NOMINAL IN
Surface TreatmentPHOSPHATE OVERALL
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL COMP 1118 OVERALL
Smallest Inside Diameter0.257 INCHES NOMINAL IN
Thread Class2B
Nominal Tube Outside Diameter0.250 INCHES IN
Width Across Flats1.000 INCHES NOMINAL IN
Fabrication MethodMACHINED
Nut StyleTUBE COUPLING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
4820-00-365-862120584 INTERCHANGEABLE
Body,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
5330-00-589-454020584 INTERCHANGEABLE
Seal,plain Encased
Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc
3110-00-785-224520584 INTERCHANGEABLE
Shield,bearing,replacement
L3harris Interstate Electronics Corporation
4720-00-845-726220584 INTERCHANGEABLE
Hose,preformed
Gates Corporation
1040-00-936-928754A50B198 INTERCHANGEABLE
Housing,valve
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5970-01-006-574120584 INTERCHANGEABLE
Insulator,washer
Elbitamerica, Inc.
2520-01-082-8619114-517 INTERCHANGEABLE
Parts Kit,universal Joint
Rockford Powertrain Inc Div Powertrain Rockford, Inc.
Cross-Reference Index
Part NumberManufacturer
1655867PC33 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
205-8-4 PRIMARY Lenz Inc Dba the Lenz Company (USA)
Related Parts
4820-00-365-8621INTERCHANGEABLE
BODY,VALVE
20584
5330-00-589-4540INTERCHANGEABLE
SEAL,PLAIN ENCASED
20584
3110-00-785-2245INTERCHANGEABLE
SHIELD,BEARING,REPLACEMENT
20584
4720-00-845-7262INTERCHANGEABLE
HOSE,PREFORMED
20584
1040-00-936-9287INTERCHANGEABLE
HOUSING,VALVE
54A50B198
5970-01-006-5741INTERCHANGEABLE
INSULATOR,WASHER
20584
2520-01-082-8619INTERCHANGEABLE
PARTS KIT,UNIVERSAL JOINT
114-517

Frequently Asked Questions

What is NSN 4730-00-650-2184?

NSN 4730-00-650-2184 is a Nut,tube Coupling,reducing, manufactured by Lenz Inc Dba the Lenz Company, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-650-2184?

NSN 4730-00-650-2184 has 2 cross-referenced part numbers: 1655867PC33 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 205-8-4 (Lenz Inc Dba the Lenz Company).

What NSN replaces 4730-00-650-2184?

There are 7 known substitutes for 4730-00-650-2184: 4820-00-365-8621, 5330-00-589-4540, 3110-00-785-2245 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 205-8-4?

Key specifications for 205-8-4: Length to Shoulder: 0.750 INCHES NOMINAL IN; Nominal Thread Size: 0.878 INCHES IN; Thread Direction: RIGHT-HAND; Thread Series: UNF. 15 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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