1-66099-3 is a loose piece pin assembly (Type III+) designed for reliable electrical interconnections in controlled environment applications. The pin features a brass body with a diameter of 1.588 mm (+0.025/-0.051) and a stainless steel spring, with an overall length of 27.10 ±0.51 mm. The mating end is plated with a minimum 0.76 µm precious metal over 1.27 µm minimum nickel plate, with gold flash all over, conforming to TE Connectivity Product Spec 108-10042 based on EIA/ECA-364-1000.01A. The assembly supports wire range of 18-16 AWG and insulation range of 2.03-2.54 mm diameter. This pin assembly is suitable for applications requiring dependable contact performance in controlled environments.