MIL-DTL-43455K
1/
For class 1, the pattern pieces may be cut from Olive Green 107 cloth conforming to class
2, or dyed ground shade cloth conforming to class 3 of MIL-DTL-43191. For class 2, the
pattern pieces may be cut from woodland camouflage printed cloth conforming to class 3,
or dyed ground shade cloth conforming to class 3, or dyed Camouflage Green 483 cloth
conforming to class 2 of MIL-DTL-43191. For class 4, the pattern pieces may be cut from 3
color desert camouflage printed cloth conforming to class 5 or ground shade conforming to
class 5 of MIL-DTL-43191. For class 5, the pattern pieces may be cut from the universal
camouflage printed cloth conforming to class 6 or ground shade conforming to class 6 of
MIL-DTL-43191.
2/
May be cut from cotton oxford lining or cotton/nylon oxford cloth.
3/
May be cut from cotton/nylon oxford cloth.
4/
May be cut from basic material cloth.
3.6
Construction.
3.6.1 Stitches, seams and stitching. All stitching, seams and stitchings shall conform to
FED-STD-751. The type of seam, stitching, and stitches per inch shall be as specified in Table II. Seam
allowances shall be maintained with seams sewn so that no raw edges, runoffs, pleats, or open seams occur.
Where two or more methods for seams or stitch types are given for the same part of the operation, any one
of them may be used. When stitch type 401 is used, the looper (underthread), shall be on the inside of the
coat. Unless otherwise indicated, the gage of stitching for the double-lapped, double-stitched seams shall
be 3/16 to 5/16 inch. The width of overedging specified in Table II shall be 3/16 to 1/4 inch. The guide
and knives for the overedge machines shall be set to trim only the raveled edges of the fabric. All seams
shall start and finish evenly.
3.6.1.1 Type 301 stitching. Ends of all stitchings shall be backstitched or overstitched not less
than 1/4 inch except where ends are turned under or caught in other seams or stitchings. Ends of a
continuous line of stitching shall overlap not less than 1/2 inch. Thread tensions shall be maintained so that
there will 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 imbedded in the materials sewn.
3.6.1.1.1
Repairs of type 301 stitching. Repairs of type 301 stitching shall be as follows:
a. When thread breaks, skipped stitches, run-offs, or bobbin runouts occur during sewing, the stitching
shall be repaired by restarting the stitching a minimum of 1/2 inch back of the end of the stitching. 1/
b. Thread breaks or two or more consecutive skipped or run-off stitches noted during
inspection of the item shall be repaired by overstitching. The stitching shall start a minimum of 1/2 inch in
back of the defective areas, continue over the defective area and continue a minimum of 1/2 inch beyond
the defective area onto the existing stitching. Loose or excessively tight stitching shall be repaired by
removing the defective stitching without damaging the materials and restitching in the required manner. 1/
1/
When making the above repairs, the ends of the stitching are not required to be backstitched.
3.6.1.2 Types 401, 502, 503, 515, 516, and 519 stitching. Thread tension shall be maintained
so that there will be no loose or excessively tight stitching resulting in puckering of the materials sewn. All
repairs shall be in accordance with 3.6.1.1.1a and 3.6.1.1.1b. Type 301 stitching may be used in repairing
type 401 stitching.
3.6.1.3
Thread ends. All thread ends shall be trimmed to 1/4 inch maximum length.
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