A-A-50371B
The fabric shall be stitched-bonded fleece with the following characteristics:
Weight (minimum) 4.5 o z./sq. yd. Warp (gauge, minimum) 18 per inch Weft (stitches, minimum) 16 inch
3.3 Metal parts
3.3.1 Steel box toe. The steel box toe for the Type I boot only shall conform to the toe of the last and shall be fabricated from cold-rolled carbon steel. After heat treatment, as specified and tested in accordance with American National Standards Institute (ANSI) Z41, the steel box toe shall conform to the requirements in Table I.
TABLE I. Physical requirements - Steel box toe
Characteristic |
Requirement |
Test method |
Hardness (Rockwell C) |
42 - 52 |
ASTM-E-18 |
Carbon content |
0.50 to 0.82 |
ASTM-E-18 |
Thickness (inch) |
0.058 + (.0025) |
ASTM-E-18 |
3.3.2 Buckle. The Type I boot buckle shall be made of aluminum, brass, bronze, or steel. The buckle shall have two strap slots approximately 3/4 inch wide and a lever eye or stay slot approximately 9/16 inch wide.
3.3.3 Rivets/caps and washers/eyelets. When used, rivets and caps or washers and eyelets shall be made of brass, bronze, or steel and shall be of a size suitable for the purpose intended.
3.3.4 Shanks. Steel shanks shall be used.
3.4 Shin reinforcement. The shin reinforcement shall be either an inner shin guard made of a minimum .100 hardened rag or an exterior shin protector made of heavy knurled rubber.
3.5 Leakage test for finished boot. Boots shall be tested for leakage by inserting a hose or pipe into the boot and applying an air pressure of 1 + 0.1 psi. The top of the boot shall be closed in a manner to prevent the escape of air and the boot shall be immersed in a tank of water so that the top of the boot is approximately 3 inches above the water level. Evidence of leakage shall be indicated by bubbles of air that form below the water level and rise to the surface of the water.
3.6 Construction. The boots shall be constructed in accordance with the contractor's patterns and lasts. All overlapped parts shall be firmly rolled or pressed before vulcanization.
3.7 Height measurements. The inside height of the Type I boots shall be not less than 29 inches. The inside height of the Type II boots (excluding leg loops) shall be not less than 13 inches. The height, using a finished boot, shall be measured at the inside heel area to the top, back of the boot.
3
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business