Model: MS21916-8-4R

Boss Reducer

Properties:

Thread Class
3a all ends
Reducer Type
Concentric
Maximum Operating Temp
250.0 degrees fahrenheit single response
Connection Style
External seat for gasket seal (boss) all ends
Connection Type
Threaded external boss all ends
Thread Size
0.438 inches 2nd end
Thread Size
0.750 inches 1st end
Reduced Passage Inside Diameter
0.200 inches 2nd end
Nominallength
1.328 inches
Material
Steel comp 321
Material Specification
66, aisi 316/sae 30316 federal specification 2nd material response
Media For Which Designed
Hydraulic fluid 1st response
Media For Which Designed
Oxygen, gaseous 2nd response
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35, type 2 federal specification 1st treatment response or astm a380 assn standard 2nd treatment response
Thread Series Designator
Unjf all ends
Specification Data
81343-as21916 professional/industrial association standard
NSN
4730-01-241-4122
Part Number
MS21916-8-4R
Description
Reducer,boss
CAGE
81343

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 MS21916-8-4R NSN 4730-01-241-4122

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:
A
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
052190
UFC:
30000
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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