MIL-DTL-24705B(SH)
3.4.8 Molded parts. Molded parts shall be free of flash, blow holes, or cracks. Small gas bubbles that form on
the face and top surface shall not be cause for rejection provided the molded parts are in accordance with the
requirements specified herein, and on the applicable specification sheet (see 3.1). Flash shall be removed and the
width of the flash edges shall not be greater than 0.8 mm (1/32 inch).
3.4.8.1 Stress relief. Measures shall be taken in molding or processing GRP to ensure that stress buildup does
not occur; or, the items shall be satisfactorily treated to relieve these stresses to prevent deterioration or failure of a
part or assembly. The stress-relieving process shall be as specified by the manufacturer of the raw materials.
3.4.9 Surface finish. Surface finishes for metals and GRP shall be as specified in 3.4.9.1 and 3.4.9.2,
respectively.
3.4.9.1 Surface finish for metals. A maximum surface roughness of 6.35 micro meters (250 micro inches) is
permissible for machined parts. Surface finish shall be in accordance with ASME B46.1.
3.4.9.2 Surface finish for GRP. There shall be no evidence of air or gas pockets, resin pockets, solvent areas,
areas lacking resin, uncured areas, decontamination, or soft spots in GRP used as structural or other parts.
3.4.10 Nonmagnetic inboard penetrations. When specified to be nonmagnetic (see 6.2), inboard penetrations
shall meet the nonmagnetic requirements of 3.5.4.
3.4.11 Special tools and equipment. Unless approved by NAVSEA, special tools and equipment for
installation, removal, or replacement of frames, or for reconfiguration of accessories and insert blocks, shall not be
required. Special tools are defined as tools not listed in the Federal Supply Catalog [copies of this catalog may be
consulted in the office of the Defense Contract Administration Services Management Area (DCASMA)].
3.5 Performance. Multiple cable penetrator frames, accessories, and insert material items (see 6.4.6) shall be
constructed to meet the performance requirements specified herein, and on the applicable specification sheet (see
3.5.1 Vibration. Multiple cable penetrators shall withstand the vibration test of 4.6.3.
3.5.2 High impact (HI) shock. Multiple cable penetrators shall withstand the shock test of 4.6.4.
3.5.3 Watertight. Multiple cable penetrators shall be watertight and shall exhibit leakage not greater than
specified (see 4.6.5).
3.5.4 Nonmagnetic. When nonmagnetic multiple cable penetrators are specified (see 3.4.10 and 6.2), the metal
parts shall indicate a permeability level of less than 2.0 (see 4.6.6).
3.5.5 Electromagnetic compatibility (EMC). When EMC-protected multiple cable penetrators are specified
3.5.6 Salt spray. Multiple cable penetrators shall exhibit no corrosion or physical damage (see 4.6.8).
3.5.7 Fire stop. Multiple cable penetrators shall withstand the fire stop test of 4.6.9.
3.5.8 Durometer. Insert material shall have a Class A durometer hardness (see 4.6.10), as specified on the
applicable specification sheet (see 3.1).
3.5.9 Compression. Insert material shall have a compression not greater than the value specified on the
3.5.10 Expansion. Insert material shall have an expansion not more than the value specified on the applicable
3.5.11 Fluid immersion. Insert material shall exhibit no apparent physical change, and the durometer hardness
shall be not greater than the value specified on the applicable specification sheet (see 3.1 and 4.6.13).
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