Hermetic M12 connector

These hermetically sealed M12 male socket connectors are designed to exceed the mechanical and environmental requirements of IEC-61076-2-101 with fixed pin contacts, fused into a glass dielectric insert.



Hermetically sealed M12 connectors from In2Connect are available as male receptacles with male eyelet, solder bucket and/or PCB contacts.

Based on the M12 threaded coupling connector range these glass to metal sealed connectors have been designed and manufactured to meet customers’ stringent individual requirements for environmental, mechanical and mounting conditions.

Key Features

Key Features

  • Installation size – M12 X 1
  • No of contacts – 3, 4, 5, and 8
  • Compact, Robust design
  • Hermetically sealed in stainless steel shell
  • Corrosion resistant
  • Coding – For non standard coding please consult



  • Contact – Nickel Alloy 52
  • Contact plating – Nickel-plated, gold-plated
  • Contact carrier – Glass
  • Housing – Stainless Steel
  • Eyelet, PCB or Solder bucket contacts
  • Sealing – Fusion to Stainless Steel shell
  • O-Ring – Fluorosilicone


  • Current Rating – To IEC 61076-2-101 downrated for Alloy 52 contacts = 2 Amps #20 contacts
  • Rated voltage – IEC 61076-2-101
  •  Insulation resistance – 100m @ 500VDC


  • Degree of protection – IP 68+
  • Mating cycles – IEC 61076-2-101


  • Temperature range – 55 to 175C. Higher temperature material options are available.
  • Hermeticity – Leakage rate of less than 1 x 10-8 cc/sec at one atmosphere pressure differential


  • Sockets, PCB or wire –

– Male Square Flange socket

– Male Round Flange socket

– Male Jam nut socket

– Male Through Flange socket

The shell mounting configuration for the Square Flange and Jam Nut is interchangeable with that of MIL-DTL-26482, shell size 8



Hermetic M12 connectors from In2Connect are designed to exceed IP68 in an unmated state. These connectors have a wide variety of applications and can be found in most industry sectors, such as transport and instrumentation, for use with proximity switches, sensors and interconnection in harsh environmental conditions. Standard Hermetic connectors are sealed by fusing a single piece glass insert into a machined Stainless Steel Shell. The pin contacts are permanently fused into the insert. To maintain thermal compatibility with the glass insert, the contacts are manufactured from a nickel alloy. The protective plating on the pin contacts is electro-deposited gold over nickel.

The Jam Nut is supplied with a fluorosilicone rubber O-ring for panel sealing. All In2Connect M12 and M12 hermetic connectors are RoHS compliant. The standard hermetic M12 connector is not designed as a pressure resistant connector even though the inserts are capable of withstanding high pressure differentials. For specific pressure critical applications please call us.



Download M12-Hermetic-Connectors Data sheet