MIL-DTL-27434/21A
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are given for information only.
3. Unless otherwise specified dimensional tolerances are ±.005 inches.
4. The lockwasher shall have the following characteristics: externally toothed, phosphor bronze, silver
plated, 0.398 inch maximum and 0.384 inch minimum inside diameter; 0.694 inch maximum and
0.670 minimum outside diameter.
5. The finished jam nut shall have the following characteristics: .375-32 UNEF-2B, brass, 0.551 inch
minimum across flats, 0.093 inch thick.
FIGURE 1. Type UG691/U connector adapter Continued.
ENGINEERING DATA:
Impedance: 50 ohms, nominal.
Voltage rating: 100 V rms, maximum at sea level.
Temperature rating: -65º C to +165º C.
REQUIREMENTS:
Dimensions and configuration: See figure 1.
Mating characteristics: Series BNC socket contact in accordance with MIL-STD-348, and series
SM pin contact interface shall be in accordance with MIL-DTL-27434 after assembly.
Corrosion: Applicable.
Vibration: Applicable.
Shock: Applicable.
Leakage: The adapter shall be subjected to a gage pressure test of 50 pounds per square inch applied
at one end, and the whole adapter immersed in water at 20ºC. The adapter shall remain immersed in
water for at least 20 seconds.
When the adapter is under test there shall be no evidence of loss of pressure as detected by escaping
air bubbles.
Part or Identifying Number (PIN): UG-691/U.
Supersession: This document supersedes drawing MS35114 (SigC).
Changes from previous issue. Marginal notations are not used in this revision to identify changes with
respect to the previous issue due to the extent of the changes.
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