MIL-PRF-39012/25F
Item
Material
Description
Rivet
Brass
1
Inches
mm
Inches mm
.385 9.78
.001
0.03
Pad
Silicone rubber
2
.397 10.08
.002
0.05
.468 11.89
.003
0.08
Disc, body
Brass
3
.515 13.08
.005
0.13
.593 15.06
.020
0.51
Sleeve
Brass
4
.70 17.9
.047
1.19
2.250 57.15
.094
2.39
Wire rope
SST
5
2.700 68.58
.124
3.15
4.00 101.6
.144
3.66
Covering
Teflon, nylon or
6
.25
6.3
equivalent
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are given for information only.
3. Unless otherwise specified, tolerance is ±.005 inch (0.13 mm).
4. Standard coupling brass, bead chain monel metal or stainless steel, and
offset coupling, brass.
5. The bead chain to be finished with nickel plate, in-lieu-of silver, conforming to MIL-PRF-39012.
(Exception: Parts which are fabricated with monel metal or stainless steel are not required to be
plated, provided such parts will pass the corrosion test as specified in MIL-PRF-39012.). The wire
rope shall be specified in MIL-DTL-83420, type 2, composition B.
6. The offset coupling must rotate freely after riveting.
7. Safety chain: (Optional) passivated corrosion resistant steel, in accordance with MIL-PRF-39012.
8. The chain shall withstand a tensile force as specified. The force shall be applied at a rate of
approximately 100 pounds per minute. The applied force shall be 30 pounds for bead chain and 75
pounds for safety chain. The force shall be attached to the hole in the standard coupling.
9. Bayonets of connector shall lock in bottom slot and shall maintain the connector interface free of dust
and moisture.
10. For alternate construction only.
FIGURE 4. M39012/25-X006 cover for series BNC female connectors with bead chain.
M39012/25-X007 cover for series BNC female connectors with safety chain.
M39012/25-X106 cover for series BNC female connectors with wire rope Continued.
7
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