TM 55-1680-317-23&P 2-7. SEWING REPAIRS - Continued Table 2-3.  Stitching Specifications - Continued Recommended sewing machine Component (code symbol) Stitches per Inch Thread size Individual Cold Climate Survival Kit Outer Case MD 7-9 FF DN Darn FF Grommet reinforcement MD 7-9 FF DN Darn FF Pocket tie tape MD 7-9 FF Carrying handle MD 7-9 FF Slide interlocking fastener MD 7-9 FF Inner Case MD 8-11 E Slide interlocking fastener MD 8-11 E Attaching strap MD 8-11 E Connecting strap MD 8-11 E Connecting strap reinforcement MD 8-11 E First Aid Kit Case MD 8-11 E DN Darn E Individual Overwater Survival Kit Outer Case MD 7-9 FF DN Darn FF Grommet reinforcement MD 7-9 FF DN Darn FF Pocket tie tape MD 7-9 FF Carrying handle MD 7-9 FF Slide interlocking fastener MD 7-9 FF Connector loop MD 7-9 FF Thong LD 7-9 FF Ring chape LD 7-9 FF Iinner Case MD 8-11 E DN Darn E Slide interlocking fastener MD 8-11 E Attaching strap MD 8-11 E Connecting strap MD 8-11 E Connecting strap reinforcement MD 8-11 E Connector Web MD 7-9 FF First Aid Kit Case MD 8-11 E DN Darn E OV-1 Aircraft Hot Climate Survival Kit Case MD 7-12 E DN Darn E Carrying strap MD 7-12 E Slide interlocking fastener MD 7-12 E Tarpaulin LD 7-11 E DN Darn E 2-29