NATO Stock Number
5306-00-514-8848
Sold in multiples of
DEMIL
NO
Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.406 inches
Fastener Length
Between 0.485 inches and 0.515 inches
Head Style
Hexagon extended washer
Head Height
Between 0.205 inches and 0.225 inches
Width Between Flats
Between 0.428 inches and 0.437 inches
Extended Washer Diameter
0.562 inches
Extended Washer Thickness
Between 0.030 inches and 0.050 inches
Washer Quantity
1
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Primary Washer Material Thickness
Between 0.610 inches and 0.640 inches
Material
Steel or copper
Thread Series Designator
Unc