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Unformatted text preview: a sealing device. The most common type of sealing
device is a rubber-composition gasket or lining and a sharp, flat metal rim pressed against a threaded lid.
Soldiers can increase this device’s effectiveness by applying heavy grease to its threads. (Soldiers should
not use metallic solder for sealing because it corrodes metal surfaces when exposed to moisture.)
Whenever Soldiers use any nonstainless metal container, they must apply several coats of high-quality
paint to all exterior surfaces. Instrument Containers
D-70. Distributors normally ship aircraft and other precision instruments in steel containers with a waterproof
sealing device. Standard instrument containers range from 1/2 gallon to 10 gallons. If Soldiers can find one
that is the right size, they only need to make minimum modifications to use it as a cache container. The only
weak point in the most common type of instrument container is the nut and bolt that tighten the locking band
around the lid. Soldiers should replace the original nut and bolt with a stainless steel set. Ammunition Boxes
D-71. Several types of steel ammunition boxes have rubber gasket closing devices and are satisfactory for
buried caches. An advantage of using ammunition boxes is that they are usually available at military depots. Steel Drums
D-72. Soldiers may find a caching container of suitable size among the commercial steel drums businesses
use to ship oil, grease, nails, soap, and other products. However, because most steel drums lack adequate
sealing devices, Soldiers will need to treat them with waterproof materials. Fully removable head drums
with lock-ring closures generally give a satisfactory seal. Glass Jars
D-73. The advantage of using glass is that it is waterproof and does not allow chemicals, bacteria, and
insects to pass through it. Although glass is highly vulnerable to shock, glass jars of a sturdy quality can
withstand the crushing pressure caching involves. However, glass jars do not have adequate sealing
devices for the joint around the lid. Standard commercial canning jars with spring clamps and r...
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This document was uploaded on 01/15/2014.
- Winter '14