Model: ST4M138-08-56

Spacing Threaded Standoff

Special Features:

Helical insert ms21209c0815

Properties:

Thread Class
2b left internal (includes through thread)
Thread Class
2b right internal
Thread Direction
Right-hand left internal (includes through thread)
Thread Direction
Right-hand right internal
Thread Length
0.223 inches left internal (includes through thread)
Thread Length
0.223 inches right internal
Length
Between 5.50 inches and 5.70 inches
End Application
F-15 acft
Cross-sectional Shape
Hexagon
Width Across Flats
0.312 inches
Thready Qty Per Inch (tpi)
32 left internal (includes through thread)
Thready Qty Per Inch (tpi)
32 right internal
Thread Size
0.164 inches left internal (includes through thread)
Thread Size
0.164 inches right internal
Part Name Assigned By Controlling Agency
Spacer, sleeve-hex, threaded, self
Left Countersink Angle
Between 115.0 degrees and 125.0 degrees
Right Countersink Angle
Between 115.0 degrees and 125.0 degrees
Style Designator
Left internal and right internal threads
Thread Series Designator
Unc left internal (includes through thread)
Thread Series Designator
Unc right internal
NSN
5340-01-640-7940
Part Number
ST4M138-08-56
Description
Standoff,threaded,spacing
CAGE
76301

Part ST4M138-08-56 NSN 5340-01-640-7940

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
40280
FIIG:
A08900
Concept No.:
1
App. Key:
B
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:
P
PMIC:
A
ESD:
A
ESD:
A
MMAC:
CRITL:
X

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