NATO Stock Number
5305-01-157-7388
Sold in multiples of
EA
DEMIL
NO
Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.578 inches and 0.682 inches
Fastener Length
Between 0.720 inches and 0.750 inches
Head Style
Pan
Head Diameter
Between 0.594 inches and 0.615 inches
Head Height
Between 0.203 inches and 0.218 inches
Washer Quantity
1
Internal Drive Style
Cross recess type 1
Thread Diameter
0.312 inches
Thready Qty Per Inch (tpi)
18
Hardness Rating
44.0 rockwell c primary washer and 48.0 rockwell c primary washer
Primary Washer Outside Diameter
Between 0.620 inches and 0.640 inches
Primary Washer Style
Spring tension
Primary Washer Material Thickness
Between 0.052 inches and 0.060 inches
Material Specification
Sae assn standard all material responses fastener
Material Specification
Sae assn standard all material responses primary washer
Surface Treatment
Zinc
Surface Treatment Specification
G-4342-m, code 20u32, fscm 11862 mfr ref single treatment response
Thread Series Designator
Unrc
