The thru-bulkhead receptacle comprises :
- A threaded metal shell with pin contacts insulated by glass sealing. The shell carries an integral catch pin to prevent rotation when secured in position ;
- An "O" ring seal of synthetic rubber material ;
- A hex locknut with its lockwasher.
The receptacle is secured to the bulkhead by means of a lock-nut. The passage of the receptacle through the bulkhead is sealed by compression of an "O" ring seal, placed in an annular groove in the receptacle flange. The seal is compressed between this flange and the bulkhead.
The bulkhead cut-out, as shown below, differs in accordance with bulkhead thickness. If this thickness is :
- between (2 and 10 mm) .079 and .394 in. :cut-out as par Figure 3.
- greater than (10 mm) .394 in. : cut-out as per Figure 4.
- less than (2 mm) .079 in. : consult the manufacturer.
| Shell size | Number of contact | A dia. | B dia. | F dia. | G |
| 1 | 3-6 | (33.8) 1.33 | (21) .826 | (32) 1.26 | (29) 1.14 |
| 2 | 12 | (39.8) 1.57 | (27) 1.06 | (38) 1.50 | (35) 1.38 |
| 3 | 17 | (56) 2.20 | (39) 1.54 |
| Dimensions: (mm) in. | ||||||
| Shell size | Number of contact | M | N | P | Q | R |
| 1 | 3-6 | (21.1) .830 | (34) 1.34 | (2.5) .098 | (24.9) .980 | (23) .905 |
| 2 | 12 | (27.1) 1.07 | (40) 1.57 | (2.5) .098 | (30.9) 1.22 | (29) 1.14 |
| 3 | 17 | (39.1) 1.54 | (56.2) 2.21 | |||