DIN 571 Hex Head Lag wood screws Standard Dimensions and Specifications Click the Button to Download DIN 571 Standard Dimensions and Specifications in PDF Format DIN 571 PDF Steel: –Stainless: 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