NATO Stock Number
5305-01-125-1181
Sold in multiples of
100 EA
DEMIL
NO
Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.419 inches and 0.500 inches
Fastener Length
Between 0.469 inches and 0.500 inches
Head Style
Dished hexagon
Head Height
Between 0.067 inches and 0.080 inches
Width Between Flats
Between 0.245 inches and 0.250 inches
Washer Quantity
1
Internal Drive Style
W/o internal drive
Thread Diameter
0.138 inches
Thready Qty Per Inch (tpi)
40
Hardness Rating
40.0 rockwell c primary washer and 50.0 rockwell c primary washer
Primary Washer Outside Diameter
Between 0.270 inches and 0.280 inches
Primary Washer Style
Flat external teeth
Primary Washer Material Thickness
0.016 inches
Material
Steel comp 1050 primary washer or steel comp 1566 primary washer
Material Specification
Sae assn standard 1st material response fastener
Material Specification
Sae assn standard 2nd material response primary washer
Surface Treatment
Cadmium fastener or zinc fastener
Surface Treatment
Cadmium primary washer or zinc primary washer
Thread Series Designator
Unf
