MIL-DTL-2036E
APPENDIX A
(2) Staking on inside or outside of enclosure.
(3) Shrink-fit by installing chilled plug.
Remove wrenching means when methods (2) and (3) are used.
A.5 PACKAGING
A.5.1 Packaging. The packaging requirements shall be as specified in MIL-DTL-2036.
A.6 NOTES
A.6.1 For applicable information see MIL-DTL-2036.
A.6.2.1 Explosionproof enclosure. Explosionproof enclosures are as defined in MIL-STD-108.
A.6.2.2 Joint. A joint is defined as the juncture where corresponding surfaces of the enclosure meet and
form flame arresting paths from the inside to the outside of the enclosure. The close clearance in drive
shaft and operating shaft penetrations of the enclosure also constitutes a joint.
A.6.2.3 Cylindrical joint. A cylindrical joint is formed by two adjoining cylindrical surfaces (see figure A-1).
A.6.2.4 Labyrinth joint. A labyrinth joint is one having at least two axial paths either in series or parallel,
interrupted by at least one radial path with a minimum length of .125 inch (3.18mm). For example,
labyrinth joints are commonly used for drive shaft penetrations of the enclosure (see figure A-4).
A.6.2.5 Plane joint. A plane joint is formed by two adjoining flat surfaces in parallel planes
(see figure A-1).
A.6.2.6 Stepped joint (sometimes referred to as a rabbet joint). A stepped joint is comprised of two
adjoining surfaces with a change in direction between its inner and outer edges. A stepped joint may be
composed of a cylindrical portion and a plane portion of two or more plane portions (see figure A-2).
A.6.2.7 Threaded joint. A threaded joint is formed between the adjoining surfaces of male and female
threaded members, both of which are of the same type and gauge (see figure A-3).
A.6.2.8 Width of joint. The width of joint shall consist of shortest distance from the inside to the outside
of the enclosure through the joint (see figure A-4).
A.6.2.9 Clearance or gap. The clearance shall be defined as the space between corresponding surfaces
at a joint measured normal to the surface. For cylindrical surfaces, either the radial clearance (actual
clearance between surfaces) or diametrical clearance (difference between the two diameters) may be
specified (see figure A-1 through A-7).
A.6.2.10 Internal free volume. The internal free volume is defined as the unoccupied space (air volume)
within the enclosure.
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