ASTM hexagon nuts for oil and gas sector 1. 1/2" HVY HEX NUT ASTM A194 2. 5/8" HVY HEX NUT ASTM A194 3. 3/4" HVY HEX NUT ASTM A194 4. 7/8" HVY HEX NUT ASTM A194 5. 1" HVY HEX NUT ASTM A194 6. 1-1/8" HVY HEX NUT ASTM A194 7. 1-1/4" HVY HEX NUT ASTM A194 8. 1-3/8" HVY HEX NUT ASTM A194 9. 1-1/2" HVY HEX NUT ASTM A194 10. 1-5/8" HVY HEX NUT ASTM A194 11. 1-7/8" HVY HEX NUT ASTM A194 12. 2" HVY HEX NUT ASTM A194 13. 2-1/4" HVY HEX NUT ASTM A194 14. 2-1/2" HVY HEX NUT ASTM A194