could these be used in transmissions

Nitrile rubber, also known as NBR, Buna-N, and acrylonitrile butadiene rubber, is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. This is an all-around automotive material resistant to oil, petrol, mineral (automatic transmission) oil, water and alcohol. It has a temperature limit of 225 F. It is not good for acids and many non-pertroleum solvents. Transmission gaskets usually require a specific o-ring material as noted by manufacturer. Search for a compatibility chart on the internet for more specific information.

What are dash sizes? Why not just state the actual size in mm? They're metric o-rings, right?

not sure what the dash is here. but these are not simply metric sizes. number 325 is not 325 millimeters. I am very happy with them.

Suitable for automotive repair?

Suh, Yes, can use in automotive applications. I have used them twice on my older Ford Mustang, working just fine. Have also used on hydraulics on my tractor/lawn mower, andwater hoses. Kind regards, Charles

are these O rings compatible with Propane such as would be used on BBQ or travel trailer heating?

Yes, I have replaced all the "O" rings on my RV, because of the age with rings from this kit. Two years and no problems !

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Mr O-Ring O-Ring Set, 30 Sizes, 382 Pcs (Inch Series), Black Rubber, 1 Pack

Product ID: 213662899

Details

Brand
Mr O-Ring
Colour
Black
Manufacturer
GTM
Net Quantity
382 Count
Number of Packs
1

📏30 precise sizes included

🖤Durable black rubber build

🛠️382 pcs total for every fix

฿2392

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal the deal with confidence—your ultimate O-ring arsenal awaits!

ALL IN ONE FIX KIT - 382 O-rings across 30 sizes to cover every sealing need—never get stuck without the right fit again.
COMPACT ORGANIZED - Single-pack design keeps your workspace tidy and your O-rings easy to find when urgency strikes.
PREMIUM RUBBER DURABILITY - Crafted from high-quality black rubber for long-lasting, leak-proof performance in any project.
TRUSTED QUALITY ASSURANCE - Manufactured by GTM, ensuring consistent reliability that professionals depend on.
VERSATILITY MEETS CONVENIENCE - Perfect for automotive, plumbing, manufacturing, and DIY—one pack, endless applications.

The Mr O-Ring Set offers 382 durable black rubber O-rings in 30 sizes, designed for versatile industrial and DIY sealing applications. Packaged compactly for easy organization, this GTM-manufactured set ensures reliable, leak-free performance across automotive, plumbing, and manufacturing projects.

Specifications

ASIN	B005LRSAT0
Best Sellers Rank	#94,010 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #156 in O-Rings
Brand Name	Mr O-Ring
Colour	Black
Country of Origin	India
Customer Reviews	4.6 4.6 out of 5 stars (455)
Item Weight	0.77 Pounds
Manufacturer	GTM
Model Number	650KIT70P
Number of Items	382
Number of Packs	1
Number of Pieces	382
Part Number	KIT-N70-30
Set Name	Mr O-Ring
Unit Count	382 Count

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