Why is it shown connected to a mapp gas cylinder?

Just for illustration purposes - they are the same threading as 1lb. propane cylinders. MAPP is no longer made, being replaced by MAP-Pro. Both were/are more costly than propane and burn hotter than propane.

What is the size of the male connector. I need 3/8”

The side that screws into the camping stove is 3/8" and the side that screws directly onto the disposable 1 lb. propane cylinder is a standard female 1"-20 fitting for such cylinders (not for hoses to the larger 20 lb. propane tanks).

Do I need some kind of regulator for this? I bought one and am using it but it causes the gas volume to vary wildly independent of turning the knob..

No. Sounds like a problem with the burner

Do you need to change an orfice to use the propane on a butane stove?

No, I use propane on my butane stove.

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Propane to Butane Adapter

Product ID: 210906180

Details

Brand
Hamans
Fuel Type
Propane
Material
Aluminum
Number of Items
1
Power Source
Gas Powered
Product Dimensions
1.18"L x x

🔒Self-locking leak-proof design

⚙️35g ultra-lightweight

🛠️Durable aluminum & copper build

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£6.14

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Description

🔥 Convert & conquer your outdoor fuel needs with zero hassle!

RUGGED DURABILITY - Crafted from corrosion-resistant aluminum alloy and copper for long-lasting performance in any environment.
LEAK PROOF CONFIDENCE - Self-locking mechanism ensures zero gas leaks, keeping your outdoor adventures safe and worry-free.
FEATHERLIGHT COMPACT - Weighing just 35g and pocket-sized, it’s the perfect travel companion for every backpacker and grill master.
UNIVERSAL COMPATIBILITY - Connects easily to camping stoves, lights, and other EN417 valve gear—your all-in-one outdoor fuel solution.
SEAMLESS FUEL CONVERSION - Effortlessly switch 1 lb propane tanks to EN417 valve devices for ultimate camping convenience.

The Hamans Propane to Butane Adapter is a compact, lightweight, and durable converter that allows 1 lb propane tanks to connect seamlessly with EN417 valve devices. Featuring a self-locking, leak-proof design and crafted from corrosion-resistant aluminum and copper, it’s engineered for safe, efficient fuel use during camping, backpacking, and outdoor cooking.

Specifications

ASIN	B0891LP1J5
Best Sellers Rank	#127,099 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #311 in Camping Stoves
Brand Name	Hamans
Customer Reviews	4.6 4.6 out of 5 stars (796)
Fuel Type	Propane
Included Components	Propane to Butane Adapter
Item Dimensions L x W x H	1.18"L x 1.18"W x 1.38"H
Manufacturer	Hamans
Material	Aluminum
Model Number	GL-191201
Part Number	GL-191201
Power Source	Gas Powered
UPC	730718026060

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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