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Military Electrical Plug Connector MS3138 (Straight Plug, Heavy Lanyard)
Military Electric Plug Connector - MS3138 straight plug with heavy lanyard in MIL-C-81703 ( Mil-Spec SAE-AS81703 ) Series I cross reference RT3138.

MS3138 is electrical quick disconnect plug connector. Robert Technologies is QPLd manufacturer of quick disconnect, solder terminated, push pull mating connectors meeting the requirements of Mil-C-81703 as well as the commercial, crimp terminated series of push pull coupled connectors. Contact gauges range from 12 to 20 which are non-removeable solder termination. Click to see MS3138 TAB Drawing and Insert Layout.

Please see other military electrical connectors ( SAE-AS81703 Series I, Mil-C-22992 Class L ) military electrical plug connectors ,  and commercial connectors electrical plug RT solder plug connectorsRTS07 RTS08 crimp plug connectors.

Military Electrical Plug Connector - MS3138
All parts designed, manufactured and tested to meet the following specs:
Air Leakage: Less than 1 cu. in/hr per @ 30 psi diff.
Altitude: 750 volts (rms) 60 cps @ 50,000 ft.
Corrosion: 48 hrs salt spray per Mil-STD-202A.
Contact Spacing: Minimum contact spacing (center to center): [#20 - .130] / [#16 - .168] /[#12 - .205]
Current: #20 contact - 7.5 amps / #16 contact - 25 amps / #12 contact - 40 amps.
Durability: 500 cycles of engagement without defects.
Humidity: Per SAE-AS-81703.
Insulation Resistance: Greater than 5,000 megohms @ 75°F.
Temperature Rating: -55°C to 125°C + /-3°C.
Cross Reference/Replacement
MIL C 81703** RTI DEUTSCH* Description
MS3138 RT3138 ---- Straight Plug, Heavy Lanyard
Part Identification:
MS 3138 E 19 7 P *
1 2 3 4 5 6 7
1. Military Prefix
2. Shell Style
Customer Use Drawings:
3138         Straight Plug, Heavy Lanyard
MS 3138 E-P TAB Drawing
3. Service Class
Insert Layout:
E - Fluid Resistant 125°C Operating Temperature
MS-RT Insert Layout Size 3, 7, 12
P - Potting Seal (3130, 3134, 3137) MS-RT Insert Layout Size 19
4. Shell Size
MS-RT Insert Layout Size 27
3, 7, 12, 19, 27, 37
MS-RT Insert Layout Size 37
5. Insert Configuration (See Available Layouts)
6. Contact Type
P: Pin
S: Socket
7. Alternate Clocking Position available see Manufacturer