MIL-STD-2042-2B(SH)
c. When visually inspecting an optical fiber, never stare into the end of a fiber connected to a laser source or LED.
3.2 Procedure.
NOTE: Packing assemblies and "O"-rings are not furnished with stuffing tubes. They must be ordered separately by the installing activity to suit installations.
Step 1 - Select the recommended stuffing tube, packing and "O"-ring in accordance with tables 2A1-II and 2A1-III.
TABLE 2A1-II. Nylon stuffing tube sizes for optical fiber cable.
Cable type |
Cable OD mm (in) nominal |
Tube size |
Packing assembly part no. ASTM F1836M/ |
Packing assembly opening mm (in) |
4-Fiber |
8.1 (0.32) |
2 |
17-001 |
8.26 (0.325) |
8-Fiber |
11.1 (0.44) |
3 |
18-018 |
12.0 (0.472) |
18-Fiber |
14.3 (0.56) |
4 |
19-003 |
14.8 (0.584) |
36-Fiber |
20.8 (0.82) |
5 |
20-003 |
21.7 (0.853) |
TABLE 2A1-III. Nylon stuffing tube data.
Stuffing tube sizes |
Tube size 2 |
Tube size 3 |
Tube size 4 |
Tube size 5 |
|
Straight tube |
Tube part number ASTM F1836M/ |
1-002 |
1-003 |
1-004 |
1-0006 |
"O"-ring part number ASTM F1836M- |
214 |
216 |
218 |
226 |
|
Angle tube |
Tube part number ASTM F1836M/ |
2-002 |
2-003 |
2-005 |
2-006 |
"O"-ring part number ASTM F1836M- |
212 |
216 |
218 |
220 |
|
NPT Tube |
Tube part number ASTM F1836M/ |
3-002 |
3-003 |
3-004 |
3-005 |
NPT Tap mm (in) |
19 (0.75) |
25 (1.0) |
25 (1.0) |
38 (1.5) |
|
"y" Tube |
Tube part number ASTM F1836M/ |
4-02 |
4-03 |
4-04 |
N/A |
"O"-ring part number ASTM F1836M- |
214 |
216 |
220 |
N/A |
|
2A1-2 METHOD 2A1
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