Lincoln Lubrication FITTING 1/8 NPTF LEAKPROOF

Leak proof fittings are a special purpose fitting for use in those applications where a positive seal is essential. A special synthetic rubber seal; conforming wth ASTM D2000 and SAE J200 specifications; is used to provide an effective seal against light or heavy viscosity lubricants and will withstand a back pressure up to 5;000 psig (345 bars). Not suitable as a check valve against high; sustained back pressure. Check and spring are designed to permit easy flow of lubricants.