MIL-DTL-44105C
3.7.3.1 Type 301 stitching. Ends of all stitching shall be backstitched or overstitched not less than 1/4 inch
except where ends are turned under or caught in other stitches or seams. Ends of a continuous line of
stitching shall overlap not less than 1/2 inch. There shall be no loose stitching resulting in loose bobbin or
top thread or excessively tight stitching resulting in puckering of the materials sewn. The lock shall be
embedded in the material sewn.
3.7.3.1.1 Repairs of Type 301 stitching. Repairs of Type 301 stitching (backstitching of ends not required)
shall be as follows:
a. When thread breaks or bobbin run-outs occur during stitching (except, pre-stitching), the stitching
shall be repaired by restarting the stitching a no less than 1/2 inch back of the end of the stitching.
b. Except for pre-stitching, thread breaks or two or more consecutive skipped or run-off
stitches, noted during inspection shall be repaired by overstitching. The stitching shall start no less
than 1/2 inch in back of the defective area and continue over the defective area to a point no less than
1/2 inch beyond the defective area onto the existing stitching. Loose or excessively tight stitching shall
be repaired by re-stitching after careful removal of the defective stitching to avoid material damage.
3.7.3.2 Type 101, 401, and 701 stitching. There shall be no loose or excessively tight stitching resulting in
puckering of the materials sewn. All repairs shall be in accordance with 3.7.3.1.1. Repairs of stitch Type
401 may be accomplished by use of stitch Type 301.
3.7.4 Stitches per inch. The number of stitches per inch shall be as specified in Table VI.
3.7.5 Bartacks. Bartacks shall be as specified in Table VI. Bartacks shall be free from thread breaks and
loose stitching.
3.7.6 Repairs. Repairs such as mends, darns, patches, or splices shall not be permitted on hats.
3.8 Use of automated apparel equipment. Automated apparel equipment may be used to manufacture Sun
Hats to this specification, provided that the stitch and seam types are as specified and the finished
component conforms to the required configuration. When a Government furnished shaper pattern is
forwarded, the component shall conform to that pattern.
3.9 Manufacturing operations requirements. The contractor is not required to follow the exact sequence of
operations listed, unless otherwise specified. Seam allowances required to be turned and seam turn-up of
side and lining may be pre-creased. Any additional basting or holding stitches used to facilitate
manufacture are permissible provided the thread does not show on the finished hat.
3.10 Figures. Figures 1 and 2 are furnished for guidance and information purposes only. This
specification shall take precedence over figure information.
3.11 Finished measurements. The finished hats shall conform to measurements for each respective size as
shown in Table VII.
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