Square head bolt dimensions. *Lots sizes starting at 5,000 pieces. The following sizes of DIN 478 square head bolts are available for immediate shipping from stock: Diameters ranging from M3 to M30 in regula SQUARE HEAD BOLT DIMENSIONS D F C H Nominal Max Body Width Across Width Across Head Height Diameter Diameter Flats Max Corners Max Max 1/4" 0. 444 3/4" 0. Most of these bolts will have light head marks of "307A" or similar. 268 7/16" 0. 53 0. Square Head Bolts are heavy profile hexagon head bolts with full or partial thread configurations. Refer to this chart to find the appropriate head size and corresponding wrench for hex bolts, lag bolts & square bolts in inches. Imperial Sizes: ½” up to 3” diameter in lengths up to 30” Grade: 2, 5 & 8, 304 x 316 Standard: ANSI B18. Boltport, Products of BoltportBelow is a comprehensive list of worldwide listed headed bolts dimension standards among ANSI, ASME, DIN, ISO, BS & Indian IS. ypw oafe2 4l9 phc ip74 pqte9 uu5mt 28lcmc zhz rcyhncng