Model: GS520CK4-14

Panel Screw Assembly

Special Features:

Hole in threaded end for plug at 0.112 dia. And 0.035 in. To 0.045 in. Wide by 0.024 in. To 0.034 in. Deep splines at 120 degrees apart

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.477 inches and 0.636 inches
Fastener Length
Between 1.607 inches and 1.627 inches
Head Style
Flat countersunk
Head Diameter
Between 0.394 inches and 0.404 inches
Internal Drive Style
Hexagon
Material Accommodated Thickness
Between 0.247 inches and 0.250 inches
Thread Diameter
0.250 inches
Width Across Flats
Between 0.141 inches and 0.143 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
160000 pounds per square inch
Countersink Angle
Between 99.0 degrees and 101.0 degrees
Material
Steel comp 8740 or steel comp 4140
Material Specification
Mil-s-6049 military specification single material response or mil-s-5626 military specification single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416 type 2 class 2 federal specification single treatment response
Thread Series Designator
Unf
NSN
5305-01-176-9759
Part Number
GS520CK4-14
Description
Screw Assembly,panel
CAGE
26512

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 GS520CK4-14 NSN 5305-01-176-9759

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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
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:
093486
UFC:
48950
LTL:
RATING VARIABLE
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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