SKU: FRG493204
UPC: 822320022162
MPN: 493204
The FRAGOLA 3/8 MPT Allen Pipe Plug is a precision-engineered fitting designed to seal and cap 3/8-inch NPT (National Pipe Thread) ports in fluid systems. Constructed from lightweight aluminum with blue anodized protection, this plug combines corrosion resistance with minimal weight—critical in hydraulic, pneumatic, and fuel line applications where system integrity and durability are non-negotiable. The recessed Allen head design provides secure fastening while keeping the profile low, making it ideal for tight installation spaces.
The NPT thread form ensures a tapered fit that creates a reliable seal without additional sealant tape in most applications, though Teflon tape or pipe dope is recommended for critical systems. Blue anodizing offers superior corrosion protection compared to bare aluminum, particularly valuable in marine environments, heavy equipment, and systems exposed to moisture or salt spray. The compact dimensions and light weight (0.02 lbs) make this fitting practical for applications where every ounce and inch matters—aircraft fuel systems, motorsports fuel rails, hydraulic test ports, and industrial fluid transfer equipment.
Technicians and system builders rely on FRAGOLA fittings for OEM-grade reliability and tight tolerances. This 3/8 MPT Allen plug serves as both a temporary test cap and a permanent system seal, making it a versatile choice for maintenance, repair, prototype builds, and pressure testing. Whether capping unused ports during system commissioning or providing permanent closure of unused connections, this fitting delivers consistent performance across automotive, aviation, marine, and industrial hydraulic applications.
FRAGOLA is recognized in the performance and industrial sectors for precision aluminum fittings that meet or exceed industry standards. The NPT 3/8-inch standard is one of the most common port sizes found in modern fuel injection systems, turbocharger oil return lines, and auxiliary hydraulic circuits, making this plug a practical stock item for serious builders and service shops.
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