This 1/4 inch QC would fit a 3/8 inch flared fitting.

Is this reverse thread?

No. The only reverse thread I'm aware of with propane is with the connection at the tank

can you chcarge the tank with this adaptor on?

Not sure what you are asking. This adaptor is so you can connect a hose with quick disconnect fittings to an appliance, stove, lantern, etc. You would disconnect the hose from the tank to fill it. Hope this helps.

Can an auxiliary propane tank be connected to supply the rv with gas; i.e. the reverse of using to supply a bbq?

You don't typically do it that way. You would have to add proper regulator. Item like this is used Marshall Gas Controls MER472 Stay-Longer Propane Adapter Kit , black https://www.amazon.com/dp/B005BNFBIC/ref=cm_sw_r_awdo_navT_g_M51CZ0KKA3YTDV2HYCD1 It's a tee before your reg. I was cheap and just bought hose and disconnect regulator when needed.

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3/8 Female Flare to 1/4 Propane Quick Connect Fitting for RV Gas Appliances | RV Grill Quick Connect for Low Pressure Propane Heater and Fire Pit with 1/4 Quick Connect Plug and 3/8 Female Flare Fitting

3/8 Female Flare to 1/4 Propane Quick Connect Fitting for RV Gas Appliances | RV Grill Quick Connect for Low Pressure Propane Heater and Fire Pit with 1/4 Quick Connect Plug and 3/8 Female Flare Fitting

Product ID: 190203742

Details

Brand
DOZYANT
Connector Type
Flare
Exterior Finish
Brass
Item Weight
16 ounces
Item dimensions L x W x H
0.5 x 2 x 2
Material
Brass

🔥1/4" quick connect plug for instant hookup

🔧3/8" female flare fitting for secure, leak-free connection

⏱️Quick connect key adapter for effortless setup

$36.97

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Description

🔥 Connect Fast, Grill Faster: Your RV’s New Best Friend!

DURABLE BRASS CONSTRUCTION - Premium brass ensures long-lasting, corrosion-resistant performance on every adventure.
COMPACT LIGHTWEIGHT DESIGN - At just 16 ounces and 2 inches, it’s the perfect travel companion for your RV setup.
SEAMLESS RV GRILL INTEGRATION - Easily swap your existing hose and regulator for instant propane connection.
TRUSTED BY PROS ENTHUSIASTS - Top-rated with 4.7 stars from over 900 users—join the community that never compromises.
UNIVERSAL LOW PRESSURE COMPATIBILITY - Works flawlessly with grills, heaters, and fire pits designed for low-pressure propane.

This 3/8" female flare to 1/4" propane quick connect fitting by DOZYANT offers a reliable, brass-built adapter designed for low-pressure propane appliances. Perfect for RV grills, heaters, and fire pits, it enables quick, secure connections by replacing existing hoses and regulators. Compact and lightweight, it’s highly rated for durability and ease of use, making it an essential upgrade for any RV gas setup.

Specifications

ASIN	B082683LGQ
Best Sellers Rank	#43,733 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #250 in Grill Connectors & Hoses
Brand Name	DOZYANT
Connector Type	Flare
Customer Reviews	4.7 4.7 out of 5 stars (914)
Exterior Finish	Brass
Item Dimensions	0.5 x 2 x 2 inches
Item Weight	16 ounces
Manufacturer	DOZYANT
Material Type	Brass
Number of Pieces	1
Size	1/4''
Thread Size	1/4"
Thread Type	NPT
Unit Count	1 Count

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$36.97

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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TrustScore 4.5 | 7,300+ reviews

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