Qualfast: 1/2 UNC X 80 (3.1/4) Studbolt & 2 Nuts A193 BZP (GR-B7/2H) Screwed Studding UNC BZP (Bright Zinc Plated) - Grade B7/2H Stud Bolt With 2 Hex Nuts BS 4882 MPN: 1/2 UNC X 80 (3.1/4) Studbolt & 2 Nuts A193 BZP (GR-B7/2H) Attributes: Grade: B7/2H Leading Standard: DIN 976-1 Length: 80mm Material: Steel Product Type: Stud Bolt c/w 2 Nuts Surface Treatment: Zinc Plated Thread Direction: Right Hand Thread Size: 1/2" UNC