Model: MS21915J4-3

Boss Reducer

Properties:

Thread Class
3a 2nd end
Thread Class
3b 1st end
Reducer Type
Concentric
Connection Style
External seat for gasket seal (boss) 2nd end
Connection Style
Gasket seal (boss) 1st end
Connection Type
Threaded external boss 2nd end
Connection Type
Threaded internal boss 1st end
Thread Size
0.375 inches 2nd end
Thread Size
0.437 inches 1st end
Nominallength
1.250 inches
Material
Steel comp 304
Thread Series Designator
Unjf all ends
Specification Data
96906-ms21915 government standard
NSN
4730-01-308-4886
Part Number
MS21915J4-3
Description
Reducer,boss
CAGE

A straight fitting having a boss connection of a different size at each end. Both connections have external 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. Excludes bushing (as modified).

Part MS21915J4-3 NSN 4730-01-308-4886

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
23541
FIIG:
A080B0
Concept No.:
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 7307994000
  • SITC: 67959
  • End Use: Iron and steel products, other
  • NAICS: 332919
  • USDA: 1

Freight Class: Other fittings nesoi of alloy steel not stainless

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