Model: 3551-A-440-SS-20

Spacing Threaded Standoff

Properties:

Thread Class
2b left internal (includes through thread)
Thread Direction
Right-hand left internal (includes through thread)
Thread Length
0.4500 inches and 0.5050 inches left internal (includes through thread)
Length
Between 0.4550 inches and 0.5050 inches
Cross-sectional Shape
Hexagon
Width Across Flats
0.2500 inches
Thready Qty Per Inch (tpi)
40 left internal (includes through thread)
Thread Size
0.1120 inches left internal (includes through thread)
Right Projection Diameter
Between 0.1850 inches and 0.1880 inches
Right Projection Length
Between 0.0720 inches and 0.0780 inches
Material
Steel comp 303 standoff
Material Specification
Astm-a-582 assn standard single material response standoff
Surface Treatment
Passivate standoff
Surface Treatment Specification
Mil-f-14072 military specification single treatment response standoff
Style Designator
Projection one end
Thread Series Designator
Unc left internal (includes through thread)
NSN
5340-01-459-0156
Part Number
3551-A-440-SS-20
Description
Standoff,threaded,spacing
CAGE
55566

Part 3551-A-440-SS-20 NSN 5340-01-459-0156

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:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.2000lbs
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:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
095190
UFC:
49790
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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