Foster ST3F3-S Steel Quick Connect Plug – 3/8" FNPT, FST Series Industrial Interchange

Model: ST3F3-S
Category: Pressure Washer Accessories → Quick Connect Fittings
Type: Foster ST3F3-S Steel Quick Connect Plug – 3/8" FNPT, FST Series Industrial Interchange

The Foster ST3F3-S Steel Quick Connect Plug is a heavy-duty industrial coupling designed for high-pressure fluid transfer and pressure washing applications. Built to the widely used FST (Straight-Thru) industrial interchange standard, this plug ensures compatibility with other fittings of the same series and size for reliable system integration.

Key Features

• Foster ST3F3-S steel quick connect plug

• 3/8" FNPT (3/8-18) threaded connection

• Rated for up to 4000 PSI

• FST Series industrial interchange compatibility

• Durable plated steel construction for strength and longevity

• Straight-through design for efficient fluid flow

• Designed for quick and secure connections

• Suitable for heavy-duty pressure washing applications

Technical Specifications

Product Name: Steel Quick Connect Plug
Brand: Foster (ZSi-Foster)
Model / Part Number: ST3F3-S
Series: ST / FST (Straight-Thru Industrial Interchange)

Connection Size: 3/8" FNPT
Thread Type: 3/8-18 NPT
Material: Plated Steel
Max Pressure: 4000 PSI
Flow Design: Straight-Through
Fitting Type: Quick Connect Plug
Condition: New

Typical Applications

• Pressure washer hose and accessory connections

• Industrial fluid transfer systems

• Pneumatic and hydraulic line connections

• Commercial cleaning equipment setups

• Heavy-duty washdown and pressure washing systems

• Applications requiring a 3/8" FNPT industrial interchange quick connect plug

⚠ Compatibility Note:
Only sockets and plugs within the same series and size will connect. Ensure compatibility with FST Series industrial interchange fittings for proper operation.