Features and Characteristics
Thread Direction
Right-hand
Thread Length
0.282 inches
Fastener Length
0.375 inches
Head Diameter
Between 0.256 inches and 0.273 inches
Head Height
Between 0.072 inches and 0.082 inches
Internal Drive Style
Slot
Thread Diameter
0.138 inches
Thready Qty Per Inch (tpi)
32
Hardness Rating
45.0 rockwell c and 53.0 rockwell c
Secondary Washer Relationship To Primary Washer
Not identical
Secondary Washer Style
Flat
Primary Washer Outside Diameter
0.250 inches
Secondary Washer Outside Diameter
0.258 inches
Primary Washer Style
Split helical ring
Primary Washer Material Thickness
0.031 inches
Secondary Washer Material Thickness
0.016 inches
Special Features
Lockwasher and washer not rated screw 55000 lbs per sq in.
Material Specification
Qq-s-634 federal specification 1st material response or 66 federal standard 2nd material response or aisi/sae assn standard 2nd material response or 66 federal standard 3rd material response or aisi/sae assn standard 3rd material response or 66 federal standard 4th material response or aisi/sae assn standard 4th material response or 66 federal standard 5th material response or aisi/sae assn standard 5th material response or 66 federal standard 6th material response or aisi/sae assn standard 6th material response or 66 federal standard 7th material response or aisi/sae assn standard 7th material response or 66 federal standard 8th material response or aisi/sae assn standard 8th material response or 66 federal standard 9th material response or aisi/sae assn standard 9th material response or 66 federal standard 10th material response or aisi/sae assn standard 10th material response or 66 federal standard 11th material response or aisi/sae assn standard 11th material response or 66 federal standard 12th material response or aisi/sae assn standard 12th material response or 66 federal standard 13th material response or aisi/sae assn standard 13th material response or qq-s-626-canc federal specification 14th material response or mil-s-7952 military specification 15th material response or mil-s-7952 military specification 16th material response
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416, type 2 class 3 federal specification single treatment response
Thread Series Designator
Unc
Specification Data
80205-nas720 professional/industrial association standard