is used on the backshell for installation and removal to
Electro Magnetic or Radio Frequency. The introduction
apply even pressure without causing damage to
of foreign electronic energy into an electrical circuit
accessories (Figure 3).
can be a significant problem.
14. BACKSHELL REMOVAL. Backshells are used to
8. EMI/RFI REDUCTION. The most common method
protect, shield, and add strength to connectors. When
of reducing EMI/RFI is to employ a physical and
modification or repair to the connector is necessary,
electrical shield which is terminated at one or both
the backshell must be removed. First remove the cable
ends to a ground potential or some other predetermined
clamp/strain relief (Paragraph: 17) then proceed using
point with respect to ground. Shields can be applied to
the following steps to remove the backshell:
individual wires, cables, bundles, or harnesses.
a. Select the correct adapter tool by series,
9. MIL-C-81511 SERIES 1, 2, 3 AND 4 CONNECTOR
T-handle, and strap wrench (Tables 2 or 3).
10. The connector accessories in this section pertain to
Series 1, 2, 3 and 4 connectors; see reference Table 1.
This section applies to accessories and tools used on
the back side or wire side of the connector. These
accessories are divided into the following categories:
Cable Clamps/Strain Reliefs.
Environmental EMI/RFI Backshells.
Gasket for Flange Mount Receptacle.
Figure 2. Adapter Tool (BT-S-389)
Mounting Plate for Flange Mount Receptacle.
11. SPECIAL TOOLS. Connector backshells come in a
wide variety of types depending on the application. To
install backshells or accessories, adapter tools and a
strap wrench are needed. Adapter tools (Figure 2) are
used to hold the connector during backshell installation
and removal. Special tools are used to prevent damage
to connector shells and accessories.
12. ADAPTER TOOL SELECTION. To select the proper
tool, the shell size, and the type, either plug or receptacle,
needs to be known; then select the applicable tool.
Refer to Tables 2 and 3 Adapter Tool Selection.
13. ADAPTER TOOL ACCESSORIES. To hold the
adapter tool and to keep the connector from turning
when installing or removing backshells, the use of a 1/
4 inch drive T-handle is recommended. A strap wrench
Figure 3. Adapter Tool Accessories