MIL-DTL-45144E
ASTM D 1578 - Standard Test Method for Breaking Strength of Yarn in Skein Form
ASTM D 1907 - Standard Test Method for Linear density of Yarn (Yarn Number) by
the Skein Method
ASTM D 2256 - Standard Test Method for Tensile Properties of Yarns by the Single-
Strand Method
ASTM D 2257 - Standard Test Method for Extractable Matter in Textiles
ASTM D 2645 - Standard Tolerances for Yarns Spun on the Cotton or Worsted
Systems
ASTM D 638 - Standard Test Method for Tensile Properties of Plastics
(ASTM publications may be ordered online at www.astm.org, or from 100 Barr Harbor Drive PO
Box C700, West Conshohocken, PA 19428-2959.)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a
conflict between the text of this document and the references cited herein, the text of this document
takes precedence. Nothing in this document, however, supersedes applicable laws and regulations
unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1. First article inspection. When specified (see 6.6), a sample shall be subjected to first
article inspection in accordance with 4.2.
3.2. Conformance inspection. A sample shall be subjected to conformance inspection in
accordance with 4.3.
3.3. Fuse powder train (Type I). Fuse powder train shall contain the following by weight:
69% to 73% potassium nitrate in accordance with MIL-P-156 Class 1; approximately 10% sulfur in
accordance with MIL-S-14929; and 16% charcoal in accordance with A-A-59138. The fuse powder
train shall be continuous throughout the length of the train and shall be of such density and
formulation as to comply with the requirements specified herein for the finished fuse.
3.4. Inert fuse powder train (Type II). A non-energetic, inert material shall be used. The
material color shall be visually distinct from the Type I fuse powder. The inert fuse powder train
shall be continuous throughout the length of the train and shall be of such density and formulation
as to comply with the requirements specified herein for the finished fuse.
3.5. Cotton yarn.
3.5.1. Cotton center longitudinal yarns. The three yarns shall be of 15/3 or 10/2 or 24/2/2
size/ply absorbent cotton yarns and shall be in the center of the fuse powder of 3.3 and 3.4.
3.5.2. Cotton counter yarns. Cotton yarn countering shall be performed on top of jute yarn
spinning of 3.6.1. The countering shall consist of a tight spiral wrap of 10 cotton yarns of 10/2
size/ply applied with a Z twist, also known as left hand twist.
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