Spring contact probes Taiwan series PT058 Technical specifications (recommended) Minimum center: 1 mm( 40 mil) Current rating: 2 amps, continuous Contact resistance: 70 milliohms Mounting holes size: Ф0.75mm Rated stroke: 1.3 mm( 0.052”) Spring force: 56 g ( 2 oz)/ 22g (0.8 oz) Materials Receptacle: phosphor bronze, gold plated Contact barrel: phosphor bronze, gold plated Spring: stainless steel wire, gold plated Plunger: high carbon steel (standard) or full-hard beryllium copper ( available) or gold plated over nickel Test probes works as electrical interfaces between the test equipment and the circuit board under test. The construction of PT058 : The plunger is made of high carbon steel or full-hard beryllium copper plated with gold to eliminate surface oxides and to lower electrical resistance. Various probe tip styles are adopted to suit any test requirement according to different applications. Spring is constructed of stainless steel wire, plated with gold which prevents corrosion. The barrel is made of phosphor bronze, plated with gold. The interior of the barrel makes good electrical contact with the plunger and spring whereas the exterior of the barrel makes good electrical contact with the receptacle. The receptacle is made of phosphor bronze plated with gold. Phosphor bronze has the features of excellent electrical conductivity, corrosion resistance, wear resistance and fatigue resistance. HOW TO eliminate contact problems caused by dirty probes Preventive Maintenance: Environment – reduce airborne contamination such as dust, clothing fibers or particles from an adjacent wave-solder machine PCB –keep printed circuit boards as clean as possible Dust Covers – put dust covers over idle fixtures Air Filters –fixing an air filter in the release port Probe Cleaning: Gently brushing the probe tips with a small brush with nylon or natural fiber bristles PT058 is a very popular model in spring contact probes. Apart from it, our factory also manufactures a large number of other models. If you are interested, please feel free to contact me or browse our website (www.centalic.com) for detailed specifications. Thanks a lot! Contact person: Stella Tel: 86-755-27494785-229 Email: probe321@163.com Skype: test123probe