MIL-DTL-2036E
3.2.4.1 Die castings. Die castings shall not be used where the casting might be subject to impact. Zinc
alloy die castings shall not be used where dimensional changes of the casting could affect use of
equipment.
3.2.4.2 Porous castings. When required, castings shall be impregnated in accordance with
MIL-STD-276.
3.2.4.3 Classification and inspection. Castings shall be classified and inspected in accordance with
SAE AMS2175.
3.2.4.4 Inserts. Inserts, which are intended to be cast in place, shall be knurled, grooved, or otherwise
prepared to secure satisfactory keying of the insert to the casting. Inserts shall be fabricated from a
material which is not adversely affected by exposure to the molten casting alloy. When inserts are located
near a casting edge, sufficient edge distance shall be allowed in order to develop the required resistance
to insert pull-out, and to avoid cracking of the casting. Casting defects resulting from use of inserts, such
as partial alloying, poor bonds, porosity, and cracks shall not be present.
3.2.4.5 Selection and application. In any design utilizing metallic castings, consideration shall be given to
intended application, the availability of molding and casting alloys, the choice of a suitable casting
process and the use of ribs and fins.
3.2.4.6 Repair of unmachined castings. Repair of minor discontinuities or defects in unmachined or raw
castings shall be permitted only when specific approval has been granted by the contractor Material
Review Board (MRB), or is specified on the engineering documentation. Weld repair shall be limited to
class 3 and class 4 castings (class 1 and class 2 repair shall require procuring activity approval) and to
areas where no severe stress will be encountered. Heat treatable alloys shall be fully reheat treated after
welding to meet drawing guidelines.
3.2.4.7 Repair of machined castings. Repair of defects in machined castings shall be permitted for class
3 and class 4 castings based on the contractor's MRB decision. Class 1 and class 2 casting repair shall
require procuring activity approval. Reheat treatment shall be required unless engineering analysis during
MRB action can demonstrate it is unnecessary.
3.2.5 Lifting provisions (see 4.6.3). Enclosures that will weigh more than 75 pounds when equipment is
installed within the enclosure shall have lifting eyes integral with the enclosure, or shall be equipped with
eyebolts or other lifting provisions, to facilitate lifting and handling of the equipment. Where provisions
such as eyebolts are used, their removal shall not leave openings into the interior of the enclosure.
3.2.6 Projections edges and corners (see 4.6.3). Projections and overhanging edges which may cause
personal injury or catch upon clothing shall be avoided. Edges and corners of external surfaces shall be
rounded to a minimum radius of 0.04 inch (1.02mm), and exposed corners to a minimum of .5 inch
(12.7mm).
3.2.7 Mounting details (see 4.6.4). The mounting requirements in accordance with MIL-E-917 and as
specified in 3.2.7.1 through 3.2.7.3 shall apply to all enclosures except those forming a part of portable
equipment.
3.2.7.1 Enclosed assemblies, subassemblies, and parts. The enclosure shall provide structural support
of assemblies, subassemblies, and parts mounted within the enclosure. Mounting bolts for the enclosed
assemblies, subassemblies, and parts shall not penetrate the enclosure. Mounting of assemblies,
subassemblies, and parts shall be independent of enclosure mounting.
3.2.7.2 Enclosure mounting. The enclosure mounting bolts shall be accessible after the equipment is
installed inside. It shall not be necessary to remove assemblies, subassemblies, and parts before
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