CE V S PHG 250 0910 Cop yright 2010 b y Wur th 12 0182 S T AN D A RD PLO W BOL T S R ound count ersunk sq uare nec k Gr ade 5 s t eel bar e blue passiv ated Thr ead dia d 38 716 12 58 Head Diameter Min Shape A 0671 0781 0890 1094 Depth of Squar e and Head S max 0312 0364 0417 0506 Width of Squar e max B 0387 0450 0515 0640 No of thr eadsinch UNC 16 14 13 11 Thread dia in inc hes Lengt h in inc hes Minimum t h read lengt h Grade 5 UNC bare P Qty Grade 5 UNC blue passiv P Qty 38 114 T t o H 22138114 50 112 1 22138112 50 134 1 22138134 50 21 221382 25 212 1 22138212 25 31 221383 20 716 112 T t o H 221716112 50 134 118 221716134 50 2 118 2217162 50 214 118 221716214 50 212 118 221716212 50 3 118 2217163 25 12 112 T t o H 22112112 25 2 114 221122 25 212 114 22112212 25 3 114 221123 25 58 1 T t o H 221581 50 112 T t o H 22158112 50 134 T t o H 22158134 25 2 T t o H 221582 25 214 112 22158214 25 212 112 22158212 25 234 112 22158234 25 3 112 221583 20 312 112 22158312 20 T t o H indicates the bolt is thr eaded t o head or squar e