Amphenol Tri-Start Subminiature Cylindrical Connectors
MIL-DTL-38999 Series III

Amphenol ® Tri-Start MIL-DTL-38999* Series III Connectors offer the highest performance capabilities for both general duty and severe environment applications. Meeting or exceeding MIL-DTL-38999 Series III requirements, the Tri-Start connector with standard metal shells (aluminum or stainless steel with several finish options) offers these features:

• EMI Shielding - solid metal to metal coupling, grounding fingers, electroless nickel plating, and thicker wall sections provide superior EMI shielding capability of 65dB minimum at 10 GHz
• Contact Protection - recessed pins in this 100% scoopproof connector minimize potential contact damage
• Moisture Resistance - improved interfacial seal design helps prevent electrolytic erosion of contacts
• Corrosion Resistance - shells of stainless steel or cadmium over nickel plating withstand a 500 hour salt spray exposure
• Vibration/Shock - operates under severe high temperature vibration, through 200°C
• Firewall Capability - available in a stainless steel shell, class RK, RS
• Lockwiring Eliminated - unique, self-locking, quick coupling connector eliminates lockwiring
• Quick Coupling - completely mates and self-locks in a 360° turn of the coupling nut
• Inventory Support Commonality - uses standard MILDTL-38999 contacts, application tools, insert arrangements
• Electrostatic Discharge Protection (ESD) - protection for sensitive circuitry without diodes, varistors, etc., with the use of the Faraday Cage principal which shunts high voltage, high current discharge events (see page 51)
• Ground Plane Connectors - with metallic insert for
common grounding of coax, triax or twinax contact outer
shield.

MIL-Qualified to MIL-DTL-38999, Rev. K, the Amphenol ® Composite Tri-Start Connector offers a lightweight, corrosion resistant connector with the same high performance features as its metal counterpart. The Composite Tri-Start Connector also includes the following features:

• Lightweight - 17% – 70% weight savings (17–40% weight savings vs. aluminum), (60–70% weight savings vs. stainless steel)
• Corrosion Resistance - available in standard MILDTL-38999 olive drab cadmium (175°C) and electroless nickel plating (200°C), both withstanding 2000 hours of salt spray exposure. The base material is able to withstand an indefinite exposure to salt spray.
• Durability - 1500 couplings minimum (in reference to connector couplings, not contacts)
• Extended Life Contact - Mil-approved plating process which provides 1500 couplings minimum. The latest offering from Amphenol in MIL-DTL-38999, the CLUTCH-LOK connector offers:

All advantages of stainless steel/Class K firewall Tri-Start connectors plus a unique clutch design that actually tightens itself under vibration. Features include:

• High degree of differential torque
• No settling back to the next ratchet tooth
• Completely intermateable with all existing MIL-DTL-38999 Series III connectors
• Offers advantage in inaccessible, hard to reach areas where mating torque is difficult to apply and complete coupling is not verifiable by inspection.

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