NATO Stock Number
5305-00-177-5312
Sold in multiples of
1 HD
DEMIL
NO
Thread Class
2a
Thread Length
Between 0.644 inches and 0.706 inches
Fastener Length
Between 0.688 inches and 0.750 inches
Head Style
Round
Head Diameter
Between 0.382 inches and 0.408 inches
Head Height
Between 0.139 inches and 0.153 inches
Washer Quantity
1
Internal Drive Style
Slot
Thread Diameter
0.216 inches
Thready Qty Per Inch (tpi)
24
Hardness Rating
40.0 rockwell c primary washer
Primary Washer Outside Diameter
Between 0.395 inches and 0.406 inches
Primary Washer Style
Flat external teeth
Primary Washer Material Thickness
0.022 inches
Material
Steel comp 1070 primary washer or steel comp 1566 primary washer
Material Specification
66 federal standard all material responses fastener
Material Specification
66 federal standard all material responses primary washer
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
