MIL-PRF-81757/9D
5. The receptacle terminal block shall be 0.866 ± 0.015 from the centerline of the contact pins in
the top surface of the terminal block. The receptacle shall be so located that the top of the
terminal block and the cell terminal contact surfaces are in the same plane. Receptacle terminal
block shall be screw size 10-32. Receptacle shall conform to MS3509-28 per MIL-PRF-
18148/3.
6. All dimensions are prior to epoxy coating except: overall length = 11.812 max, overall width
= 10.500 max., and overall height = 10.312 max.
7. Spacers, if used, shall be polyethylene sheet Classification PA0111 or PA0191 per ASTM
D4066, minimum 0.015 inch thick, color neutral.
8. A sensor (thermocouple or thermistor), when required shall be located as shown on figure 2
for the purpose of monitoring battery temperature during testing to this specification. The sensor
shall be positioned in the approximate center of the cell container's widest outer surface
(equidistant from the top and bottom and free side to side).
9. Length and width of cover pad and spacer shall conform to the inside dimensions of the
applicable cover.
10. The length, width, and thickness of cover pad projections shall provide sufficient pressure on
the vented filler caps to hold down the battery cells during vibration.
11. The quantity and location of cover projection pads shall be determined by the vented filler
caps.
12. The base dimensions of the container shall be within tolerance for a distance of 2 inches up
from the bottom.
13. The battery identification on the M81575/9-3 battery shall indicate the correct supersession
date as indicated in Note 1.
14. The M81757/9-3 battery shall incorporate M81757/1-10 bolts to secure the cell
interconnecting strap, thereby preventing cell removal.
15. The "CAUTION" label on the M81757/9-3 battery shall contain the following additional
information: "The cells in this battery are not to be removed."
16. The cell vented filler cap shall be in accordance with MIL-PRF-81757/2.
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