Model: 1653656-1

Panel Screw Assembly

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.250 inches
Fastener Length
0.625 inches
Head Style
Fillister extended washer
Head Diameter
0.308 inches
Head Height
0.270 inches
Internal Drive Style
Hexagon
End Application
C-17a aircraft
Thread Diameter
0.190 inches
Width Across Flats
0.156 inches
Thready Qty Per Inch (tpi)
32
Min. Tensile Strength (psi)
160000 pounds per square inch
Part Name Assigned By Controlling Agency
Screw captive snap-in type
Material
Aluminum alloy 6061 stand-off or aluminum alloy 7075 stand-off
Material
Steel comp 303se fastener
Material
Steel comp 303se ring
Material Specification
Ams5640 assn standard single material response fastener
Material Specification
Ams5640 assn standard single material response ring
Material Specification
Qq-a-225 federal specification 1st material response stand-off
Surface Treatment
Anodize stand-off
Surface Treatment
Passivate fastener
Surface Treatment
Passivate ring
Thread Series Designator
Unf
NSN
5305-01-543-2643
Part Number
1653656-1
Description
Screw Assembly,panel
CAGE
99251

A headed, threaded fastening device over which may be assembled; (1) a stand-off; (2) a flanged bushing with washer(s) and/or a shouldered bushing without a flange, or it may have an internally threaded sleeve that is an integral part of the screw; a washer and an externally thread self-locking bushing that is driven by an inserted driver. Attached to panel by threaded bushing or by flaring end of stand-off, or bushing. Used in conjunction with a speed nut, nut plate, or driven into a threaded hole in the item that the panel is fastened to. May be spring loaded.

Part 1653656-1 NSN 5305-01-543-2643

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
33044
FIIG:
A003B0
Concept No.:
App. Key:
SU
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:
BA
CRITL:
X

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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