MIL-S-4040G
3.8 Marking. Unless otherwise specified (see 3.1), solenoids shall be permanently and legibly marked with either the manufacturer's name, trademark, symbol, or CAGE code and the date code, as shown in the following example; and, wherever space permits, the applicable PIN, the rated voltage (or current), and the operating frequency. Paper levels shall not be used. Other markings which in any way interfere with, obscure, or confuse those specified herein, are prohibited. Markings shall remain legible after all tests.
Example: |
12345 |
- Manufacturer's CAGE code |
6824 |
- Date code |
3.8.1 Date codand manufacturer'source code. The date code and manufacturer's CAGE code shall be in accordance with MIL-STD-1285.
3.9 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.10 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin content of (product) and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.8).
3.11 Workmanship. Solenoids shall be processed so that they are uniform in quality and shall be free from cracked or deformed parts, sharp edges, burrs, or other defects which could affect their life, serviceability, or appearance.
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. Materials inspection (see 4.3).
b. First article inspection (see 4.5).
c. Conformance inspection (see 4.6).
4.2 Test equipand inspection facilities. The supplier shall establish and maintain a calibration system in accordance with ISO 17025, ISO-10012, or equivalent.
4.3 Materials inspection. Materials inspection shall consist of certification that the materials used are of a type that will ensure that the solenoid meets all the requirements of this specification.
4.4 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with the test conditions specified in the General Requirements section of MIL-STD-202.
4.5 First article inspection. First article inspection shall be performed at a laboratory acceptable to the Government on sample units produced with equipment and procedures normally used in production.
4.5.1 Sample size. Twelve solenoids shall be subjected to the first article inspection.
4.5.2 Inspection routine. The sample shall be subjected to the inspections specified in table II, in the order shown, except that groups II and III may be conducted concurrently. All sample units shall be subjected to the inspection of group I.
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