MS27789D
Inches mm Inches mm
NOTES:
.005 0.13 .432 10.97
.008 0.20 .469 11.91
.012 0.30 .47 11.9
.020 0.51 1.05 26.7
.060 1.52 1.140 28.96
.076 1.93 1.340 34.04
.38 9.7 1.660 42.16
.42 10.7 1.706 43.33
1. Dimensions are inches.
2. Metric equivalents are given for general information only.
3. Unless otherwise specified, tolerance is ± .020 (0.51 mm) for two place decimals and ± .005 (0.13 mm) for three place decimals.
4. For hardware detail specifications see appendix of MIL-DTL-3950.
5. Contact installing/removal tool in accordance with MIL-I-81969.
6. Grommet sealing plug in accordance with MS27488A20.
7. Sealing plugs may be used in nonfunctional grommet holes.
8. Sealing grommet shall seal on a smooth wire insulation of .040 (1.02 mm) to .083 (2.11 mm)
9. Terminal shall adequately accept a wire contact within dimensional limits of SAE-AS39029.
10. The terminal end of switch shall be color coded red to indicate contact size.
11. Direction of internal mechanism movement is opposite to the direction of the toggle movement.
12. Part number example: MS27789-21A ( locking combination 'A')
13. In the event of a conflict between the text of this standard and the reference cited herein, the text of this standard shall take precedence.
FIGURE1. Dimensions and configuration- Continued
TEST REQUIREMENTS:
Test shall be performed in accordance with MIL-DTL-3950 except:
During all tests, switch shall be fully wired with appropriate wire and terminal contacts.
Contact voltage drop- the contact voltage drop with two terminals and the switch contact in series shall not exceed 8 millivolts measured from one wire contact through the contacts to the other wire contacts.
DETAIL REQUIREMENTS:
Locking arrangement: Positive locking shall be accomplished and shall prevent motion of the toggle lever until the locking mechanism is manually released.
The force required to release the locking mechanism shall be 3 to 5 pounds.
The locking means at the top of the toggle bushing shall be capable of withstanding a torque of 20 inch- pounds applied in both directions immediately following the humidity test.
Weight: .227 pound maximum.
3
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