Model: MS21921-3R

Tube Coupling Nut

Special Features:

Weapon system essential

Properties:

Thread Class
3b
Thread Direction
Right-hand
Fabrication Method
Any acceptable
Nut Style
Tube coupling
Nut Height
Between 0.570 inches and 0.590 inches
End Application
Aircraft, f-16
Width Across Flats
0.438 inches
Length To Shoulder
Between 0.419 inches and 0.439 inches
Smallest Inside Diameter
Between 0.232 inches and 0.237 inches
Thread Series
Unf
Thready Qty Per Inch (tpi)
24
Thread Size
0.375 inches
Tube Outside Diameter
0.188 inches
Seat Angle
45.00 degrees
Criticality Code Justification
Feat
Material
Stainless steel
Surface Treatment
Passivate
Specification Data
96906-ms21921 government standard
NSN
4730-00-825-2087
Part Number
MS21921-3R
Description
Nut,tube Coupling
CAGE
81343

An internally threaded nut which has either an internal seat or shoulder and/or is designed to be used with a ferrule, to mate with the seat of an externally threaded tube fitting to form a leakproof connection. Excludes nut (1), tube coupling, reducing; and nut (1), union.

Part MS21921-3R NSN 4730-00-825-2087

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
03859
FIIG:
A021A0
Concept No.:
1
App. Key:
CX
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:
SX
CRITL:
Y

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
3.6000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
M
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
573
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318160000
  • SITC: 69421
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Nuts of iron or steel

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