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Boss Elbow

NSN: 4730-01-644-3578 | Model: 92650-00811-101

A fitting that forms an angle of less than 180 degrees (3.141 radians) from the straight flow. The boss connections have external and/or internal machine threads (straight threads other than pipe or hose series), and are designed to facilitate a gasket, preformed packing, washer, or the like, to form a seal at the boss. It may have side or heel inle (s) . It is designed to join two bosses or boss fittings on items such as tanks, housings, valve fittings, and the like. Excludes elbow, tube.

NSN Properties and Flags
NATO Stock Number
End Application
Sikorsky helicopter, model s-92a
Flow Angle
90.0 degrees
Part Name Assigned By Controlling Agency
Elbow, 90 degree swage
Special Features
The item is part of the upper deck hydraulic tubes

Inventory Check

The last inventory check on this NSN was done on 10/13/2021. Due to rapid changes in inventory this may not be the current stock qty.

  • New: 88

Pricing and Availability

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NSN 4730-01-644-3578 Datasheet

Supply Class (FSC):
Railing Fittings Lubrication Tube Pipe Hose
Cross Reference:
  • 92650-00811-101
Cage Codes:
  • Sikorsky Aircraft Corporation (CAGE 78286)

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.


A - Item does not contain precious metal.


- Represents items with no adp components


- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Questions & Answers:

What are the historical prices recorded for this stock number?
No pre-dated pricing for this NSN could be found.
Does NSN 4730-01-644-3578 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Republic Of Korea
What is the NIIN of NSN 4730-01-644-3578?
016443578 or 01-644-3578
Does NSN 4730-01-644-3578 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 4730-01-644-3578?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
May 01, 2015