Model: 18S01-4-1AA

Panel Screw Assembly

Special Features:

Recess plug depth 0.130 - 0.150 inches; stud diameter 0.247 - 0.249 inches; interior threads

Properties:

Thread Class
3b
Thread Direction
Right-hand
Fastener Length
0.800 inches
Head Style
Flat countersunk
Head Diameter
0.358 inches
Internal Drive Style
Hexagon
Thread Diameter
0.164 inches
Width Across Flats
Between 0.157 inches and 0.159 inches
Thready Qty Per Inch (tpi)
36
Countersink Angle
100.0 degrees
Part Name Assigned By Controlling Agency
Stud assembly, flush
Lead Thread Quantity
Four
Material
Steel comp 8740
Material Specification
Mil-s-6049 military specification all material responses
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416, ty2 cl2 federal specification all treatment responses
Thread Series Designator
Unf
NSN
5305-01-553-3542
Part Number
18S01-4-1AA
Description
Screw Assembly,panel
CAGE
71286

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 18S01-4-1AA NSN 5305-01-553-3542

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:
A
ESD:
A
MMAC:
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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