The High-Pressure Internal Thread Connector for Manufacturing Leak Testing

The FasMate FN is FasTest’s high-pressure internal thread connector—designed to seal inside threaded bores up to 5,000 psi (345 bar) for leak testing, pressure decay testing, proof testing, and fluid transfer applications. The FasMate FN inserts into the threaded bore, expands a split collet to grip the threads, and engages an internal seal—all in a single quick motion. No wrenching into the threads, no sealant, no thread tape, and no risk of cross-threading or galling the bore.

The FasMate FN is one of FasTest’s most versatile connectors. It covers five major thread standards—NPT, BSPT, BSPP (G), metric, and O-ring boss/flare ports—in sizes from the smallest sensor bores through the recently expanded range up to 1½” NPT. Three actuation methods are available: lever handle for manual bench testing, thumb valve for one-handed operation in tight spaces, and pneumatic actuation for automated and semi-automated test stations. The FasMate FN is also available with ICON™ intelligent connection technology for digital seal verification and PLC integration.

For automotive engine testing, fluid power proof testing, aerospace component testing, and any application where high-pressure internal bore sealing is required, the FasMate FN eliminates the threaded connection entirely—replacing a slow, injury-prone, thread-damaging process with a fast, safe, and repeatable connection that protects both the operator and the part.