This listing is for new US / Inch Nylon Insert Lock Nuts in Stainless Steel. These have a 18-8 / A2 Grade rating.
Available sizes:
Coarse Fine
#4-40 #4-48 (fine thread)
#5-40
#6-32 #6-40 (fine thread)
#8-32 #8-36 (fine thread)
#10-24 #10-32 (fine thread)
1/4"-20 1/4"-28 (fine thread)
5/16"-1/8 5/16"-24 (fine thread)
3/8"-16 3/8"-24 (fine thread)
#5-40
#6-32 #6-40 (fine thread)
#8-32 #8-36 (fine thread)
#10-24 #10-32 (fine thread)
1/4"-20 1/4"-28 (fine thread)
5/16"-1/8 5/16"-24 (fine thread)
3/8"-16 3/8"-24 (fine thread)