Downloaded from https://www.everyspec.com MIL-STD-1311D BASE PIN SOLDER DEPTH 1. Purpose. This test is to determine the depth of solder between the tube leads and the base pins. 2. Procedure. Determine the depth of solder contact within the base pins by either sectioning soldered joints of the tubes or by the use of X-ray techniques. NOTE: This test is destructive if the X-ray technique is not used. 2.1 Minimum depth. The minimum depth of soldered contacts within the base pins shall be as follows: METHOD 1111A Pin size, inch Minimum penetration, inch .093 .125 .156 .187 Larger than .187 .031 .031 .062 .062 .094 3. Specimens. Electrical rejects may be used as specimens for this test.
METHOD 1111A 1111-1 25 March 1970