SSP - Hex Nipple SSP Instrumentation TruFit™ is manufactured from fully-traceable raw material to close tolerances and superior surface finishes. TruFit™ provides optimal performance when installed in accordance with SSP's recommendations and the design parameters appropriate for each type of connection °'àö√ë'àö'àÇ®√´°Æ tapered thread, straight thread, and weld & braze. TruFit™ components are cleaned in accordance with SSP documented work instructions using equipment calibrated to NIST standards with environmentally-safe and stable agents, ultrasonics, and heat/ temperature to remove all residual oil, grease, and loose particles. Stainless steel components are passivated to the requirements of MIL QQ-P-35 and ASTM A 967. ***Note: ALL NPT Threads REQUIRE the user to properly install the fitting by using a thread sealant to prevent leaks. Best Value Vacs recommends GAS PTFE Tape Specifications: Connection Type 1 Male NPT Connection Size 1 Specified by User Material 316 Stainless Steel ASTM A-276 and A-479 bar stock, A-182 forgings. Working Pressure (PSIG) 1/4" - 8300 3/8" - 7850 NPT Pressure Rating >10,000PSI ASME B31.3 SSP proudly makes Duolok™, TruFit™, FloLok™ and hundreds of other products 100% in the USA!