Table 2-2. Sewing Machine Code Symbols

TM-10-1670-298-20P Container Delivery System A-7A Cargo Sling Manual
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TM 10-1670-298-20&P e. Stitching and Restitching. Stitching and restitching on airdrop equipment constructed from cloth, canvas, and webbing should be accomplished with thread which matches the color of the original stitching, when possible. All straight stitching should be locked by back stitching each end of the stitch formation by ½-inch (1 270 cm.). Restitching should be locked by overstitching each end of the stitch formation by ½-inch (1.270 cm). Zigzag stitching does not require locking; however, zigzag restitching should extend at least ¼-inch (0.635 cm) into undamaged stitching at each end, when possible. Restitching should be made directly over the original stitching, following the original stitch pattern as closely as possible. NOTE Table 2-2 lists the various industrial sewing machine symbols common to most aerial delivery repair facilities and Table 2-3 Indicates stitching specifics normally encountered while performing maintenance on aerial delivery textile items of equipment. Table 2-2. Sewing Machine Code Symbols Code Symbol Sewing Machine LD SEWING MACHINE, INDUSTRIAL: General sewing, 301 stitch; light duty; NSN 3530-01-177-8590. MD ZZ SEWING MACHINE, INDUSTRIAL: Zigzag, 308 stitch; medium duty; NSN 3520-01-181-1421. LD ZZ SEWING MACHINE, INDUSTRIAL: Zigzag, 308 stitch; light duty; NSN 3530-01-181-1420. HD SEWING MACHINE, INDUSTRIAL: General sewing; 301 stitch, heavy duty, NSN 3530-01-177-8588. MD SEWING MACHINE, INDUSTRIAL: General sewing, 301 stitch; medium duty, NSN 3530-01-177-8591. DN SEWING MACHINE, INDUSTRIAL: Darning; lockstitch, NSN 3530-01-177-8589. LHD SEWING MACHINE, INDUSTRIAL: 301 stitch; light heavy duty, NSN 3530-01-186-3079. ND SEWING MACHINE, INDUSTRIAL: 301 stitch, double-needle; NSN 3530-01-182-2873. 2-11

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