Hexagon Nuts, Hexagon Coupling Nuts, Hexagon Thin Nut, Square Nut, Hexagon Castle Nuts, Self Locking Nut, Hexagon Domed Cap Nuts.
These are designed as per drawing and customers specifications:
Size range: M12 to M150 & 1/2" to 6"
Specifications: IS (GR.8.8, 10.9, 12.9,) BS (GR. R, S, T), ASTM A193 (GR.B7), ASTM A320.