A307 Grade A Carriage Bolts are manufactured from low carbon steel to meet or exceed ASTM A307 Grade A

#37 x 6 High Speed Aircraft Bit Cobalt

50 x 40 Hex Cap Screw DIN 933 A2 (18-8) Stainless Steel - DIN 933 A2 Hex Cap Screws are manufactured from A2-70 stainless steel per ISO 3506 part 1

They can carry twice the weight of a standard wing anchor but only require a ½ inch hole

1/2-13 x 3 1/2 Hex Cap Screw SS 316 (A4)

M42-4.50 x 260 Socket Cap Screw 12.9 Alloy Plain DIN 912 M18-2.50 Socket Cap Screws 12.9 Alloy Plain DIN 912 A307 Grade A Carriage BoltsM42 4. 50 x 260 Socket Cap Screw 12. 9 Alloy Plain DIN 912 . Alloy Socket Head Cap Screws from Brighton Best. Hardness of RC 38 43, meets or exceeds DIN 912. Manufactured from heat treated alloy steel, 1960 series.