+1 734 891 0248 info@superiorharness.com
Superior Harness & Assembly
Home
Wire Harness
Custom Wire HarnessMulti-Branch Wire HarnessesBattery Cable AssembliesHigh-Flex Robotic HarnessesControl Panel WiringHigh Voltage HarnessWaterproof Harness
Overmolded Cable Assembly
Overmolded Harness OverviewUSB Overmolded AssembliesCircular Connector AssembliesCustom Strain Relief MoldingMulti-Shot Molded CableConnector Molding Services
Coil / Spiral Cable
Coil / Spiral Cable OverviewIndustrial Coil CablesMedical Coiled Cable AssemblyHi-Flex Robotic Coil CableTrailer & Vehicle Coil CableCustom OEM Coil AssembliesOvermolded Coil CableSignal Coil CableAviation Coil Cables
Cable Assembly
Cable Assembly OverviewMedical Cable AssembliesCoaxial / RF / MicrowaveEthernet & USBFiber Optic & TwinaxShielded / Hermetic
Advanced Solutions
PCB AssembliesElectromechanical AssembliesRobotics & Automation SolutionsEV & Renewable Energy SolutionsPrototype Engineering Services
Industries
Automotive & EVMedical DevicesRobotics & AutomationIndustrial / FactoryAerospace & DefenseSolar & EnergyView all industries →
Resources
BlogCertificationsCapabilities
AboutContact
Shop OnlineTrack Order
HomeShop OnlineTrack OrderAboutContact
Cart
SUPERIOR HARNESS & ASSEMBLY

Precision wire harness and cable assembly manufacturing for the automotive, medical, robotics, EV, and industrial sectors — built to your exact specifications since day one.

Company
HomeAbout UsShop ProductsBlogContact
Industries We Serve
AutomotiveBroadcastComputer WiringElectronicsOEM AppliancesRoboticsEnvironmentalSolar EnergyView all industries →
Electric VehiclesTelecommunicationMedicalAerospaceConstructionAgriculturalLighting CablesMarine
Get in Touch
3179 Black Gap Rd, Chambersburg, PA 17202
+1 734 891 0248
info@superiorharness.com
Request a Quote
© 2026 Superior Harness & Assembly. All rights reserved.
PrivacyTermsCookies
Home/Products/Circular Connector Cable Assemblies
Quick Answer
M8, M12, MIL-spec, and custom circular connector cable assemblies. Overmolded or backshell termination. Any pin count, coding, and contact configuration.
Overmolded Cable Assembly

Circular.Precision.

Circular connector cable assemblies for industrial, defense, and medical applications. M8, M12, MIL-DTL-38999, Lemo, Fischer, Amphenol, and custom circular families. Overmolded or backshell.

Submit Spec Sheet →See Capabilities
M8 to 127mm
Shell Sizes
IP67/IP68
Rated
100%
Tested
<24 H
Quote Reply
Why Circular Connectors Demand Precision

Contact Count and IP Rating Are Set at Assembly Time.

Circular connector assemblies are defined by two parameters that cannot be corrected after assembly: contact arrangement and environmental sealing. Every contact must be correctly crimped and inserted in the precise cavity position — a single transposed contact causes a field failure. Every seal must be properly seated for the IP rating to hold. Our production process treats these as zero-defect requirements with 100% verification.

We build assemblies across the full circular connector family: M8 and M12 (A, B, D, X, S coding) for industrial sensors and actuators; MIL-DTL-38999 Series I–IV for aerospace and defense; Lemo and Fischer for medical and instrumentation; Amphenol PT and MS circular for industrial and military. Overmolded strain relief or machined metal backshell per application.

M12 circular connector cable pairMIL-DTL-38999 circular connectorCircular connector pin insertion
Key Specifications
Connector Families
M8, M12, MIL-DTL-38999 (Series I–IV), Amphenol PT, Lemo, Fischer
Contact Count
2 to 128 contacts per connector
Contact Types
Crimp, solder, press-fit
IP Rating
IP67, IP68, IP69K available
Core Capabilities
Full Circular Connector Families
M8, M12, MIL-DTL-38999 Series I–IV, Amphenol PT, Lemo, Fischer, and custom shell sizes. Any pin count and contact arrangement.
Precision Contact Insertion
Every contact crimped per connector manufacturer specification and inserted into the correct cavity position. Insertion verified with a go/no-go probe.
IP67/IP68 Sealing
O-ring face seals, wire seals, and back-potting completed per connector IP rating requirement. No seal omissions.