DIN 188 T-head Bolts With Double Nib Standard Dimensions And Specifications Click the Button to Download DIN 188 T-head Bolts With Double Nib Standard Dimensions And Specifications in PDF Format DIN 975 PDF Steel: 4.8, 5.8, 8.8, 10.9, 12.9Stainless: A2,A4 Terminology and Measurements l – Length of Bolts – Size Hex Head Turnkeyb – Length of the Threadk – Head Heighte – The Diameter of the Circumscribed Circle