MIL-DTL-24231E(SH)
3.4.7 Threads. Unless otherwise specified (see 3.1), threads shall be right-hand, Class 2, in accordance with
United and American National screw threads as specified in FED-STD-H28/2.
3.4.7.1 Undercuts. Unless otherwise dimensioned (see 3.1), all undercuts shall be not more than 0.005 inch
greater than the minimum minor diameter or maximum major diameter of the thread.
3.4.8 O-rings. Assembled O-rings shall be examined and installed in accordance with S9320-AM-PRO-020.
3.4.9 Sharp edges. Drilled and tapped holes shall have all burrs removed. Sharp edges shall be slightly
rounded.
3.4.10 Finish. Surface finishes shall be in accordance with ASME B46.1, except that O-ring sealing surfaces
shall be free of all defects, scratches, voids, blow holes, dents, and flaws.
3.4.11 Loose parts. Loose parts required for installation or operation shall be enclosed in a cloth or plastic bag
and packaged with the assembly (see 6.6).
3.4.12 Voltage and current ratings (for application purposes only). In general, all of the electrical pressure-
proof fittings specified herein and in 3.1 shall have the following voltage and current ratings:
Voltage (maximum)
Current (maximum)
Power (maximum)
600 volts alternating current
For Type B-16 wire; 6 amperes
2000 watts (W)
(VAC) root mean square (rms)
(see MIL-DTL-16878/1)
1000 volts direct current (VDC)
See applicable cable requirements of
the specification sheets
3.5 Performance.
3.5.1 Insulation resistance. When tested (see 4.5.1), the insulation resistance of the electrical pressure-proof
fittings shall be as follows:
a.
Electrical connectors, receptacles, and adapters:
(1) Conductor to conductor: 5000 megohms or greater.
(2) Conductor to ground: 5000 megohms or greater.
(3) Conductor to shield: 5000 megohms or greater.
(4) Shield to ground: 1000 megohms or greater.
b.
Molded plug assemblies:
(1) Conductor to conductor: 200 megohms or greater.
(2) Conductor to ground: 200 megohms or greater.
(3) Conductor to shield: 100 megohms or greater.
(4) Shield to ground: 100 megohms or greater.
3.5.2 Dielectric withstanding voltage. When tested (see 4.5.2), electric pressure-proof fittings shall withstand
dielectric voltage and there shall be no evidence of disruptive discharge, arcing, flashover, corona, or breakdown.
3.5.3 Continuity check. When electrical pressure-proof fittings are tested as specified in 4.5.3, there shall be no
evidence of open circuits.
3.5.4 Hydrostatic pressure. There shall be no evidence of leakage when pressure-proof fittings are subjected to
the hydrostatic pressure test (see 4.5.4).
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