PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4-37-15Nut,tube Coupling

Jm Fittings, Llc Dba L & L Fittings Mfg · NSN 4730-00-808-0524 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-808-0524 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-808-0524. Primary manufacturer part number: 4-37-15.
Features
  • Nut,tube Coupling — FSC 4730
  • Thread Direction: RIGHT-HAND
  • Material: STEEL OVERALL
  • Seat Angle: 45.00 DEGREES NOMINAL
  • Smallest Inside Diameter: 0.256 INCHES NOMINAL IN
  • Nut Height: 0.718 INCHES NOMINAL IN
  • Thread Series: UN
  • Width Across Flats: 0.562 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Fluid conveyance
  • Hydraulic system plumbing
General Description

The Nut,tube Coupling, cataloged under National Stock Number 4730-00-808-0524, 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 Jm Fittings, Llc Dba L & L Fittings Mfg. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-808-0524
Primary Part Number4-37-15
Item NameNut,tube Coupling
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerJm Fittings, Llc Dba L & L Fittings Mfg
StatusACTIVE
Thread DirectionRIGHT-HAND
MaterialSTEEL OVERALL
Seat Angle45.00 DEGREES NOMINAL
Smallest Inside Diameter0.256 INCHES NOMINAL IN
Nut Height0.718 INCHES NOMINAL IN
Thread SeriesUN
Width Across Flats0.562 INCHES NOMINAL IN
Nut StyleTUBE COUPLING
Nominal Thread Size0.437 INCHES IN
Thread Quantity Per Inch20
Nominal Tube Outside Diameter0.250 INCHES IN
Thread Class2B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5935-00-006-2944252541-2 INTERCHANGEABLE
Connector,receptacle,electrical
Raytheon Company Dba Raytheon
5950-01-141-912125P228032-01 INTERCHANGEABLE
Transformer,power
Herley Chicago Dba Stewart Warner Electronics
Cross-Reference Index
Part NumberManufacturer
4-37-15 Jm Fittings, Llc Dba L & L Fittings Mfg (USA)
705J3 Linde Lift Truck Corp. (USA)
705J3 Linde Material Handling North America Corporation (USA)
Related Parts
5935-00-006-2944INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
252541-2
5950-01-141-9121INTERCHANGEABLE
TRANSFORMER,POWER
25P228032-01

Frequently Asked Questions

What is NSN 4730-00-808-0524?

NSN 4730-00-808-0524 is a Nut,tube Coupling, manufactured by Jm Fittings, Llc Dba L & L Fittings Mfg, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-808-0524?

NSN 4730-00-808-0524 has 3 cross-referenced part numbers: 4-37-15 (Jm Fittings, Llc Dba L & L Fittings Mfg), 705J3 (Linde Lift Truck Corp.), 705J3 (Linde Material Handling North America Corporation).

What NSN replaces 4730-00-808-0524?

There are 2 known substitutes for 4730-00-808-0524: 5935-00-006-2944, 5950-01-141-9121. Verify interchangeability with system specifications before substitution.

What are the specifications of 4-37-15?

Key specifications for 4-37-15: Thread Direction: RIGHT-HAND; Material: STEEL OVERALL; Seat Angle: 45.00 DEGREES NOMINAL; Smallest Inside Diameter: 0.256 INCHES NOMINAL IN. 13 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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