NATO Stock Number
5305-00-042-4215
Sold in multiples of
DEMIL
NO
Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.719 inches and 0.844 inches
Fastener Length
Between 0.844 inches and 0.875 inches
Head Style
Hexagon
Head Height
Between 0.270 inches and 0.295 inches
Width Between Flats
Between 0.551 inches and 0.562 inches
Washer Quantity
1
Internal Drive Style
Slot
Thread Diameter
0.375 inches
Thready Qty Per Inch (tpi)
16
Hardness Rating
30.0 rockwell c fastener and 40.0 rockwell c fastener
Hardness Rating
40.0 rockwell c primary washer and 50.0 rockwell c primary washer
Primary Washer Outside Diameter
Between 0.640 inches and 0.660 inches
Primary Washer Style
Flat external teeth
Primary Washer Material Thickness
Between 0.032 inches and 0.040 inches
Material
Steel comp 1020 or steel comp 1050
Material Specification
Sae assn standard all material responses
Surface Treatment
Cadmium or zinc
Surface Treatment Specification
Qq-p-416, type 1, cl 3 federal specification 1st treatment response or qq-z-325, type 1, cl 3 federal specification 2nd treatment response
Thread Series Designator
Unc
