PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

71651Fitting,lubricant Pressure Relie

Textron Lycoming Inc Williamsport Plant · NSN 4730-01-378-2590 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-378-2590 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-378-2590. Primary manufacturer part number: 71651.
Features
  • Fitting,lubricant Pressure Relie — FSC 4730
  • 2 verified cross-references
  • Primary manufacturer: Textron Lycoming Inc Williamsport Plant
Applications
  • Plumbing and fluid distribution
  • Industrial piping systems
  • Fuel and lubricant distribution
General Description

The Fitting,lubricant Pressure Relie, cataloged under National Stock Number 4730-01-378-2590, 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 Textron Lycoming Inc Williamsport Plant. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameFitting,lubricant Pressure Relie
FSC / FSG4730 — No Item Name Available (FSG 47)
ManufacturersTextron Lycoming Inc Williamsport Plant (CAGE 80254)
Technical Specifications
ParameterValue
NSN4730-01-378-2590
Primary Part Number71651
Item NameFitting,lubricant Pressure Relie
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerTextron Lycoming Inc Williamsport Plant
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
2520-00-463-4432A3838Y77 INTERCHANGEABLE
Cap Assy,drive Shaft
Meritor Industrial Products, Llc
5950-00-723-388140300 INTERCHANGEABLE
Saturable Reactor
Freed Transformer Co
1560-00-890-3673A109-6-5 INTERCHANGEABLE
Brush,wing Closure
Legacy Components Llc
Cross-Reference Index
Part NumberManufacturer
71651 PRIMARY Textron Lycoming Inc Williamsport Plant (USA)
716518 Textron Lycoming Inc Williamsport Plant (USA)
Related Parts
2520-00-463-4432INTERCHANGEABLE
CAP ASSY,DRIVE SHAFT
A3838Y77
5950-00-723-3881INTERCHANGEABLE
SATURABLE REACTOR
40300
1560-00-890-3673INTERCHANGEABLE
BRUSH,WING CLOSURE
A109-6-5

Frequently Asked Questions

What is NSN 4730-01-378-2590?

NSN 4730-01-378-2590 is a Fitting,lubricant Pressure Relie, manufactured by Textron Lycoming Inc Williamsport Plant, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-378-2590?

NSN 4730-01-378-2590 has 2 cross-referenced part numbers: 71651 (Textron Lycoming Inc Williamsport Plant), 716518 (Textron Lycoming Inc Williamsport Plant).

What NSN replaces 4730-01-378-2590?

There are 3 known substitutes for 4730-01-378-2590: 2520-00-463-4432, 5950-00-723-3881, 1560-00-890-3673. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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