These are custom small u bolts we supplied to our customer at approximately 16,000 pcs.  The 1/4-20 thread was rolled per customer specifications and the zinc plating was done to QQ-Z-325.  Width between the legs is set at 1.060 inches before the extended rolled thread, outside length at 1.84 inches, and thread length at .62 inches.  Material was .217-.213 diameter 1010 steel per ASTM A108.