Flame King FK-SSPT-12INX2 1/4" Male NPT Adapter (Not

Flame King’s 12-inch stainless steel braided pigtail hose (1/4" male NPT) is a durable connector that links refillable propane cylinders to RV or trailer regulators while offering thermal and excess-flow safety protections.

This two-pack of Flame King pigtail hoses is built for on-the-road propane connections where a compact, reliable link between tank and regulator is needed. Each hose measures 12 inches and combines a Type 1 ACME nut for cylinder attachment with a 1/4" male NPT threaded end for regulator or tee connections (note: this is not a flare fitting). Engineered for heavy-duty use, the assembly is stainless steel braided with a steel inner core and rated to handle high BTU loads up to 80,000 BTUs per hour and pressures up to 250 PSI. The hoses include built-in thermal protection and excess flow shutoff to reduce risk during abnormal events like overpressure or fire exposure.

How does this pigtail hose connect to my RV regulator?

The hose attaches to standard refillable propane cylinders using the Type 1 ACME nut on one end and screws into regulators or brass tees with the 1/4" male NPT on the other. Because the male end is NPT rather than flare, it mates directly to devices specified for NPT threading. Installation requires proper sealing tape or thread compound for gas use and hand-tightening followed by a small wrench turn per manufacturer torque guidance.

• Type 1 ACME nut connects to 5–40 lb refillable propane cylinders
• 1/4" male NPT threads for regulators, 4-port tees, or auxiliary ports
• 12-inch length gives compact routing with minimal kinking
• Use approved thread sealant for gas lines on NPT threads

Will this handle high-demand appliances and pressure?

Yes — the Flame King pigtail is rated to deliver up to 80,000 BTUs per hour and withstand pressures up to 250 PSI, making it suitable for most RV heating, cooking, and hot-water applications that use cylinder-fed propane. The stainless braid adds abrasion resistance while the internal components are sized for consistent flow under high-demand conditions.

• 80,000 BTU/hr capacity for common RV systems
• Maximum 250 PSI working pressure rating
• Stainless steel braid for abrasion and puncture resistance

What safety features are built into the connector?

Flame King includes passive safety measures to reduce hazards if a fire or a line rupture occurs. The assembly contains a thermal cut-off that reacts to elevated temperatures and an excess-flow valve that restricts fuel flow if a sudden line break is detected. These features lower the chance of uncontrolled gas release until the cylinder valve is manually shut.

• Thermal protection that limits flow under excessive heat
• Excess-flow shutoff to reduce flow during a rupture
• Steel braid and solid fittings to resist damage from road use

What tanks and setups is this compatible with?

This pigtail works with standard refillable propane cylinders commonly used with RVs and trailers — 5, 10, 20, 30, or 40 lb tanks — and connects to regulators or 4-port brass tees for multi-appliance distribution. It is ideal as a primary cylinder-to-regulator link or as an auxiliary feed to an installed tee when you need a compact, reliable extension.

• Compatible with 5–40 lb refillable propane cylinders
• Fits regulators and 4-port brass tees using 1/4" male NPT
• Works as main or auxiliary supply hose for RV/trailer systems

Who this is for: RV owners, trailer users, and anyone maintaining portable propane systems who wants a short, rugged connector with recognized safety features. Choose this Flame King 2-pack if you need a compact 12-inch stainless braided pigtail that handles high BTU demand, fits Type 1 cylinder connections, and attaches to female NPT regulator or tee ports. It’s suited for installers and DIYers comfortable with standard propane threading and basic leak-testing procedures.