MIL-DTL-44400A
3.3.4 Setting of grommets. Holes punched to receive grommets shall be smaller than the
outside diameter of the grommet barrel so that the barrel must be forced through the hole.
Grommets shall be securely clinched without cutting the materials. Roll of the clinched grommet
shall not contain more than three scores (splits).
3.3.5 Wicking of sewing thread. There shall be no wicking of water through the stitching
on the wall assemblies when the tent is tested as specified in 4.4.1. The cup test is intended to
insure that non-wicking thread has been utilized and that no lubrication has been added to the
thread prior to or during the sewing operation. Repairs required as a result of failure of the cup
test and when authorized by the contracting officer shall be performed by treating exposed
stitching on the wall assembly with seam sealant specified in 3.3.6.
*3.3.6 Leakage of sealed seams. All exposed stitching on the exterior of the roof cap
assemblies and rain gutter shall be treated with Kenyon Consumer Products K-Kote seam sealer-J
(clear) #83-234C or equal (see 6.5 and 6.7). The requirements for infrared reflection shall not
apply. The fabric surface shall be cleaned so that it is free of dirt and moisture prior to application
of seam sealant. Sealant shall be applied with a brush or roller and shall evenly cover an area ½
inch wide on each side and on top of all stitching. There shall be no leakage of water through
seams when the tent is tested as specified in 4.4.2.
3.3.7 Seam strength. The strength of the seams shall be 80% of the fabric strength when
tested as specified in 4.4.3.
3.3.8 Repairs to liner assembly fabric. All necessary repairs shall be effected in
accordance with the Department of The Army Field Manual FM 10-16 except that hand sewn
patches, other than specified herein, will not be acceptable. Patches on holes, cuts or tears not
more than 1 inch in diameter or length shall be permitted. A maximum of one patch per liner
assembly shall be allowed without prior authorization from the contracting officer. Each patch
shall be large enough to overlap the damaged area with a margin of at least ¾ inch on all sides.
Patches shall be placed on the outside of the liner assemblies and shall not be permitted over the
seams or in hardware areas. All other repairs shall require authorization by the contracting
officer.
3.3.9 Repairs to the roof cap, walls, rain gutter and transport covers. No more than one
repair to holes, cuts, tears or burn throughs resulting from the heat sealing operation shall be
allowed. Repairs on holes, cuts, tears or bur throughs not more than one inch in diameter or
length shall be performed as follows:
a. Repairs shall be accomplished by the application of cemented patches.
Cemented patches shall be large enough to overlap the damaged area with a margin of at least ¾
inch on all sides, using cement per Minnesota Mining and Manufacturing 847 or equal (see 6.6 &
6.7).
b. For repairs of burn-throughs on panel lap seams, the width of the patch shall be
such that the overlap on each side of the burn-through shall be equal to the width of the seam.
c. Patches shall be applied to the top side of the assemblies and the patched area
shall be smooth, i.e., with the torn or cut edge securely and completely sealed and corners shall
have a radius.
3.4 Marking. All markings and labels shall conform to DDD-L-20.
3.4.1 Special markings. The letters " US" and the item nomenclature on the roof cap
assemblies and transport covers shall conform to type IV, class 9 of DDD-L-20, in the size
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