NATO Stock Number
5305-00-042-4321
Sold in multiples of
DEMIL
NO
Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.202 inches and 0.294 inches
Fastener Length
Between 0.281 inches and 0.312 inches
Head Style
Round
Head Diameter
Between 0.287 inches and 0.309 inches
Head Height
Between 0.107 inches and 0.120 inches
Washer Quantity
1
Internal Drive Style
Cross recess type 1
Thread Diameter
0.164 inches
Thready Qty Per Inch (tpi)
36
Hardness Rating
40.0 rockwell c primary washer and 50.0 rockwell c primary washer
Primary Washer Outside Diameter
Between 0.305 inches and 0.320 inches
Primary Washer Style
Flat external teeth
Primary Washer Material Thickness
Between 0.018 inches and 0.023 inches
Material
Steel
Material Specification
Sae assn standard single material response
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
Unf
