MIL-DTL-55302/53C
TABLE I. Dash number and dimensions.
Dash
Number of
Dimensions (inches)
number
contacts
A
B
C
D
E
Reference
±.010
±.015
1.290
.157
01
1.150
18
.850
1.150
---
02
03
1.890
.157
30
1.450
1.750
1.750
04
---
05
2.190
.157
36
1.750
2.050
2.050
06
---
2.490
.157
07
2.350
42
2.050
2.350
---
08
3.090
.157
09
2.950
54
2.650
2.950
---
10
11
3.990
.157
72
3.550
3.850
3.850
12
---
1/ See requirements of complete Part or Identifying Number (PIN) when polarization is required.
REQUIREMENTS:
Dimensions and configuration: See figure 1 and table I.
Material and finish:
Contact: .020 inch thick phosphor bronze in accordance with ASTM B139, UNS C51000. Gold plate in
accordance with ASTM B488, type II, grade D class 1.27, over nickel plating in accordance with SAE-AMS-QQ-N-
290, class2, 30 to 150 microinches in the engagement area for a length of .120 inch minimum (see figure 1). The
remainder of contact shall be tin lead .0001 microinch minimum in accordance with SAE-AMS-P-81728 over nickel
plating in accordance with SAE-AMS-QQ-P-290, class 2, 30 to 150 microinches.
Insulator: ASTM D5948, type SDG-F.
End guides: Left hand, sintered brass 90/10, clear chromate in accordance with MIL-C-5541, class 1A (gold
color). Right hand, sintered brass 90/10, nickel plate 300 microinches in accordance with MIL-F-14072 (silver
color).
Polarizing pin: Aluminum alloy 2011-T3 with clear chromate, in accordance with MIL-C-5541, class 1A.
Mounting screw: Brass, cadmium plated, gold chromate finish.
Flat washer: Stainless steel.
Contact identification: Numerical sequence starting with the closest contact adjacent to the left hand end guide
(gold color) shall be contact number 1; contact number 2 would be the next offset contact, etc.
Mating and unmating: The maximum insertion force, in pounds, shall not exceed a value equal to .5 times the
number of contacts, and the withdrawal force, in pounds, shall be a minimum of .11 times the number of contacts
and shall not exceed the measured insertion force.
Individual contact separation force:
Unplated contacts: One-ounce minimum when tested in production with gage shown on MIL-DTL-55302/97.
Plated contacts: One ounce minimum.
Contact resistance: The average contact resistance of all contacts measured shall not exceed 0.010 ohm, and no
individual contact pair shall have a resistance exceeding 20 milliohms.
3
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