Product Name: JIS-B-1184 Butterfly Bolt, M4 x 15L, P0.75 Surface Treatment, Fabric Mechanical Properties: JIS-B-1051:2000 Production Method Cold Pressing Processing Screw Grade: JIS-B-0205-2 (metric line) or JIS-B-0209-3 (intersect class) (8g) Below M5 grams) Part Grade (B) (Medium) Screw Length: 15.0 gal (15 L), Guaranteed Torque Classification (A)