Check the listing for details. Milton® 1/4" FNPT Straight Through Plug (Box of 10). Color: Silver, Condition: New. Listed at 16.19 USD. Features: 1/4" female national pipe threadMaximum working pressure of 5,200 pounds per square inchNot to be used on hydraulic applications Description:1/4" FNPT straight through plugs are made of case hardened steel and are plated to resist rust. Designed for use with high pressure washers and industrial carpet cleaners, these plugs have a maximum working pressure of 5,200 PSI. About Milton® Industries Inc.:This is an authentic Milton® Industrials product shipped new in packaging (NIB). Many of our products are manufactured and shipped directly from our corporate headquarters in Chicago, IL 60639, United States. For the past 70 years, Milton® Industries Inc. has been the product of choice when it comes to pneumatic accessories. We have invented numerous industry standard products, including the classic M STYLE® ?I/M? KWIK-CHANGE® Coupler and Plug, Window Inflator Gauge, Safety Blow Guns, and the iconic Driveway Signal chimes and bell. With these inventions, our portfolio has grown to over 1400 different SKU?s.