A-A-55126B
Principles and Methods of Toxicology (Fourth edition), A. Wallace Hayes (Editor),
pp. 1057 1060, 2001
(Copies of this publication is available from Taylor and Francis, Philadelphia, PA or online at
7.2 Standard samples.
7.2.1 For standard samples address the contracting activity issuing the invitation for bids or
request for proposal. Standard samples are also available at DSCP through
https://warfighter.dla.mil under tab "Vendor Info" then "Specifications/Pattern Request" under
"Special Instructions" provide color shade, roll number and solicitation/contract number.
7.3 Uses for hook and loop fastener tapes. Type II hook fastener tapes generally have slightly
higher shear strength than Type I hook fastener tape when tested with Class 1 loop fastener tapes.
Type III and IV hook fastener tapes are intended to eliminate field fraying, minimize
contamination (lint) of hook area, and is generally thinner and more flexible. Type IV offers
resistance to autoclaving. Class 1 and 4 hook and Class 1 and 4 loop fastener tapes are intended
for general purpose applications. Class 2 hook and Class 2 loop fastener tapes are intended for
those applications where flame retardancy is desired. Class 3 and 5 hook and Class 3 and 5 loop
fastener tapes are intended for applications where resistance to wetting, high humidity or to UV
radiation is required.
7.3.1 Compatibility. The user should determine whether or not the hook or loop fastener tape
of one manufacturer should be mated with the hook or loop fastener tape of another manufacturer.
In addition the sewing operation should determine if a selvage tape fastener is compatible with a
non-selvage mating tape fastener in a specific application. Due to required color matching of
Universal Shade Camouflage based end-items, manufacturers of hook and loop tape cannot be
mixed within the same delivery order or lot of a contract.
7.3.2 Special center selvage tape for applications that require extra sewing down the center of
the tape. To prevent center stitching problems on the 2-inch tape, the user needs to specify "center
selvage tape". This tape is manufactured with a 1/8 inch to 3/16 inch selvage on each edge and
down the center of the tape. This selvage is free of hook and loop.
7.3.3 Sewability. For Type III extruded hook, the stitch line should not be run off any edges.
For all other products to minimize fraying, recommend the stitch line be a minimum of 3/16" from
any edge.
7.3.4 Fray Resistance for Universal Camouflage Shades. This requirement provides assurance
that any combination of hook and loop tapes, i.e. selvage hook with non selvage loop, non selvage
hook with non selvage loop, extruded hook with selvage loop or non selvage loop or options as
specified in the contract or purchase order, will not fray up to 25 launderings.
7.4 Special adhesive backing. Special adhesive backings are available which are designed to
secure tapes to many diverse materials such as wood, glass, metal, textiles, etc. Other adhesive
backings facilitate application techniques (i.e., they may be water activated; heat activated, solvent
activated, or pressure sensitive).
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