MIL-DTL-12883/8F
Inches
mm
Inches
mm
Inches
mm
Inches
mm
.125
0.05
1.09
11.13
.002
.043
3.18
.438
1.35
.005
.053
.620
0.13
.156
3.96
15.75
1.57
.010
.062
.750
0.25
.188
4.78
19.05
2.39
.014
.094
.812
0.36
.219
5.56
20.62
2.77
.016
.109
.875
0.41
.375
9.52
22.22
1.125
28.58
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are given for general information only.
3. Unless otherwise specified, tolerance is + .016 inch (0.41 mm) and + ½º on angles.
4. Seven contact cavities equally spaced through 270º of arc, and each cavity located within ½º of true
position, shall be established along the pin circle.
5. Each contact tab shall have either:
a. 1 wire hole of .040 inch (1.02 mm) minimum width and .125 inch (3.18 mm) minimum length.
b. 2 holes of .040 inch (91.02 mm) minimum width and .075 inch (1.90 mm) minimum length.
The hole, or holes shall lie on the longitudinal centerline of the contact tab within + .008 inch (0.20
mm).
6. The design of bosses and the shape of barrier, when used, are optional. When present, barriers
shall have a maximum height of .062 inch (1.57 mm).
7. Clearance between the cavity wall and the contact, with the contact in any position, shall be no
greater than .018 inch (0.46 mm).
8. Marking shall be at any convenient visible location.
9. Material thickness of mounting flange shall be measured in an area where burring or dishing of the
mounting hole is not present.
FIGURE 1. Socket configuration Continued.
REQUIREMENTS:
Dimensions and configurations: See figure 1 and table I.
Insulating material: Ceramic, Diallyl Ortho-Phthalate in accordance with ASTM PS 15 type, SDG-F,
GDI-30F, or mineral-filled Phenolic resin in accordance with ASTM D5948 type MFE, see table I.
Contact cavities: One shape only; D-shaped or circular, at option of the manufacturer.
Float: With a pin of .041 inch (1.04 mm) diameter and .271 inch (6.88 mm) minimum length fully
inserted in a socket contact, the contact shall be capable of free movement (float) within the contact
cavity.
Saddle: The method of attaching the saddle to the insulator body, and the shape of the saddle where
attachment is effected, are optional.
Electrical:
Insulation resistance: 1,000 megohms minimum. Test pin diameter: .040 + .001 inch
(1.02 + .03 mm).
2
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