WHITWORTH
HEXAGON FULL NUTS
5/32" 3/16" 1/4" 5/16" 3/8" 1/2"
STEEL 

USED ON MANY ITEMS OF MACHINERY ,VERY POPULAR ON HEAVY CAST IRON & BRASS ITEMS
1/4" IS THE SAME THREAD AS USED ON CAMERA /TRIPOD MOUNTINGS
SOLD IN MULTIPLES OF 10
PLEASE CHECK OUT OUR OTHER ITEMS