Attahcment 0003 - ASTM D6193

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Designation: D6193 − 16 (Reapproved 2020)

Standard Practice for

Stitches and Seams1
This standard is issued under the fixed designation D6193; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the U.S. Department of Defense.

3.1.1 bartack, n—a reinforcement stitch that effectively minimizes tearing at the ends of critical stress stitchlines.

3.1.1.1 Discussion—Examples of critical stress stitchlines

include: ends of seams, zippers, pocket flaps, crotch/seat seams, collars, webbing and other components. If the bartacking process exhibits an insufficient number of stitches, improper thread size relationship or shortened bartack stitched length then it will fail under stress. Bartacking, because of the stitch density, can exhibit severe needle-cutting, thus creating a self-destructive characteristic if number of stitches is excessive, or sewing needle or thread size is too large for fabric. Bartacking is specified strictly as a relationship between length, width or throw and total stitches. It does not incorporate stitches per inch as a typical seam may specify.

3.1.1.2 Discussion—Counting finished bartack stitches is

virtually impossible since the overall process consists of three components. The process begins in a horizontal position to achieve the required length and then forms the familiar zig-zag stitch-line along the horizontal plane including backstitching at both ends to lock in the zig-zag stitches to prevent raveling. The zig-zag stitches criss-cross the initial horizontal stitch line thus virtually hiding the initial stitch line.

1. Scope

1.1 This practice covers the requirements and characteristics of stitches and seams used in the fabrication of sewn items. 1.2 This practice identifies the category, formation, and general purpose for stitch types and seam types used in the fabrication of sewn items.
1.3 Subsequent to a general discussion of stitches and seams