NATO Stock Number
5305-00-531-0339
Sold in multiples of
1 HD
DEMIL
NO
Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.645 inches and 0.728 inches
Fastener Length
0.750 inches
Head Style
Pan
Head Diameter
Between 0.407 inches and 0.425 inches
Head Height
Between 0.139 inches and 0.151 inches
Washer Quantity
1
Internal Drive Style
Cross recess type 1
Thread Diameter
0.216 inches
Thready Qty Per Inch (tpi)
24
Hardness Rating
40.0 rockwell c primary washer and 50.0 rockwell c primary washer
Primary Washer Outside Diameter
Between 0.396 inches and 0.408 inches
Primary Washer Style
Flat internal teeth
Primary Washer Material Thickness
0.022 inches
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
