Model: SM-A-853550-2

Panel Screw Assembly

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.188 inches and 0.218 inches
Fastener Length
Between 0.520 inches and 0.550 inches
Head Style
Pan no. 2
Head Diameter
Between 0.250 inches and 0.280 inches
Head Height
Between 0.065 inches and 0.095 inches
Internal Drive Style
Slot
Material Accommodated Thickness
Between 0.132 inches and 0.162 inches
Thread Diameter
0.138 inches
Thready Qty Per Inch (tpi)
32
Hardness Rating
34.0 rockwell c and 38.0 rockwell c
Part Name Assigned By Controlling Agency
Navy special project
Material
Copper alloy 360 stand-off
Material
Steel comp 4037 fastener
Material Specification
Qq-b-626, comp 22 federal specification single material response stand-off
Surface Treatment
Cadmium fastener
Surface Treatment
Cadmium stand-off
Surface Treatment Specification
Qq-p-416, type 1 cl 2 federal specification single treatment response fastener
Surface Treatment Specification
Qq-p-416, type 1 cl 2 federal specification single treatment response stand-off
Thread Series Designator
Unc
NSN
5305-01-194-0656
Part Number
SM-A-853550-2
Description
Screw Assembly,panel
CAGE
80063

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 SM-A-853550-2 NSN 5305-01-194-0656

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:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093490
UFC:
50270
LTL:
50.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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