TM  10-8400-203-23 2-5.  REPAIR  AND  MAINTENANCE  OF  SLEEPING  BAGS,  INTERMEDIATE  COLD  AND EXTREME COLD TYPE Il. – Continued Table  2-2.  Stitching  (Intermediate  and  Extreme  Cold  Sleeping  Bags) THREAD TYPE I - STITCHES OPERATION STITCH  TYPE CLASS I NEEDLE AND BOBBIN PER INCH General 301 30/3 8-12 General 301 50/2 8-12 Bartack 304 50/2 28 ea. I.  Repair  of  Flap  Closure  (Intermediate  and  Extreme  Cold  Sleeping  Bags). (1) Darning. There is no limit to the number of times that the flap may be darned. Darn a hole or tear that does not exceed 1/2 inch (1.27 cm) in length or diameter. (2) Patching. Patch holes or tears exceeding 1/2 inch in length or diameter with heat-sealed patches. m.  Replacement  of  Snap  Fastener  Retainer  (Intermediate  and  Extreme  Cold  Sleeping  Bags). (1) (2) Removal. Replace retainers which have damaged snap fasteners, holes, tears by carefully cutting the bartack stitching securing the damaged retainer to the sleeping bag, and remove. Replacement. Cut a length of 5/8 inch (1.5875 cm) wide tape plus or minus 1/4 inch (0.635 cm). Fold the tape  1  1/4  inch  (3.175  cm)  from  each  end.  Install  a  new  snap  fastener  (with  proper  sized  dies), according to original construction. Bartack or stitch (3 rows of stitching) 1/16 inch (0.476 cm) from the retainer edges to the guard strip webbing in the original location. n.  Flap  closure  Snap  Fasteners.  (Intermediate  and  Extreme  Cold  Sleeping  Bags). (1)  Resetting.  Reset  a  loose  snap  fastener  by  using  appropriate  dies. (2)  Removal.  Remove  a  damaged  snap  fastener  by  cutting  it  with  a  pair  of  diagonal  wire  cutters,  Be careful not to cut or damage the fabric, or tape. (3)  Installation.  Without  damage  to  the  fabric,  install  the  new  snap  fastener  (with  proper  sized  dies), according  to  the  original  construction, o. Repair and Replacement of Drawstring Casing and Drawstring (Intermediate and Extreme Cold Sleeping Bags). (1) (2) Darning. There is no limit to the number of times that the casing maybe darned. Darn a hole that does not exceed 1/2-inch (1.27 cm) in length or diameter. Caution should be exercised that the drawstring is not caught in the stitching. Drawstring.  Replace  defective  and  missing  drawstring. 2-9