The ASTM A320 Grade L7 Alloy Steel Stud Bolt is a high-strength fastener engineered for critical pressure vessel and pipeline applications in demanding low-temperature service. Manufactured to API 20E specifications, this 1-3/8 inch diameter stud features 8UN coarse threads for enhanced load distribution and a 140 mm overall length. Grade L7 material delivers exceptional toughness and mechanical properties down to -150°F (-101°C), making it ideal for bolting flanged connections in cryogenic, petrochemical, and offshore environments.