MIL-DTL-9401C
3.2.1 Thread. Unless otherwise specified, the thread used in the construction of the canopy shall
conform to types I, II or III, class A of V-T-295. The color and size of the thread shall be as
specified in the TDP.
3.2.2 Color. The color of webbing and tapes in fully concealed seams shall be optional except
the color red shall not be used.
3.2.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible provided
the materials meet or exceed the operational requirements, and promote economically
advantageous life cycle costs.
3.3 Construction. Details of construction shall be in accordance with the TDP and the additional
requirements as specified herein.
3.3.1 Assembly aids. Drilling, notches, stapling, basting or any other such techniques used as
aids in the manufacturing process shall be kept to a minimum and the use thereof shall be
restricted to the same limitations as markings (see 3.3.1.2). All assembly aids, such as staples,
shall be removed during or after assembly. For Navy procurements, hot glues are not authorized
as an assembly aid.
3.3.1.1 Basting. Basting requirements shall be as specified in the TDP or be in accordance with
common industry practices. Basting stitches shall not be seen in the finished seam or assembly.
Contractors unfamiliar with commercial practices shall contact the contracting officer for
specified details prior to assembly of the item.
3.3.1.2 Assembly markings. Markings on the canopy, riser and other components as an aid to
assembly and to indicate stitching patterns shall be accomplished in a manner that will not
adversely affect the utility, strength, or appearance of the parachute.
3.3.2 Warp direction. The warp direction of the canopy material shall be parallel to the skirt
reinforcement band (seams) unless otherwise specified in the TDP.
3.3.3 Reinforcement bands. The ends of the reinforcement band shall overlap a minimum of 4
inches unless otherwise specified in the TDP. The rows of stitching shall be continuous across
the overlap.
3.3.4 Skirt reinforcement. The ends of the skirt reinforcement shall overlap a minimum of 6
inches unless otherwise specified in the TDP. The rows of stitching shall be continuous across
the overlap. When more than one piece is used, the shortest length shall cross a minimum of
four gores.
3.3.5 Vent reinforcement. The ends of the vent reinforcement shall overlap a minimum of 4
inches unless otherwise specified in the TDP. The rows of stitching shall be continuous across
the overlap. The lap joint shall be located so that the ends of the overlap will be secured by the
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