NATO Stock Number
5306-00-018-7522
Sold in multiples of
DEMIL
NO
Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.875 inches
Fastener Length
0.875 inches
Head Style
Hexagon
Head Height
Between 0.172 inches and 0.190 inches
Width Between Flats
Between 0.428 inches and 0.437 inches
Washer Quantity
1
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
28
Primary Washer Outside Diameter
Between 0.450 inches and 0.475 inches
Primary Washer Style
Flat external teeth
Primary Washer Material Thickness
Between 0.023 inches and 0.028 inches
Material
Steel comp 1010 or steel comp 1011 or steel comp 1015 or steel comp 1016 or steel comp 1018 or steel comp 1019 or steel comp 1020
Material Specification
Qq-s-633 federal specification all material responses
Surface Treatment
Cadmium or zinc
Thread Series Designator
Unf