8.3 inches seems longer than what it actually is. Am I correct?

The top is only about 2-3” in length. Don’t know where 8.3” comes from. It works really well

im guessing this tye will let alot of grease out as it doesnt fit as tight?

Typically you will lose or spill out a bit of grease, however it is pretty minimal if you can get it to seat properly (which can be tricky, even frustrating at times). Doesn't age that well either - as in repeated use the slip lock coupler (or spring plate) that keeps pressure on the connection while you pump grease wears out relatively quick increasing the likelihood of additional mess. You can however at that point wedge or push a small piece of cardboard behind the slip plate to get a better seal (typically the wedge only works once then you have to fish it out with a razor or sharp pointed tweezers and then you can do it again. Use cardboard if you do that because it needs to compress when sliding over the grease fitting.

Can I use this on a air powered grease gun running 90psi ?

yes just have to make sure you have a good connect

Will this fit on a metric grease zerk ?

Don't listen that there's no such thing as metric zerk fittings: https://www.saeproducts.com/metric-grease-fittings.html

The418 Grease Coupler | Desertcart Austria

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€ 24.92

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔩 Get Greased Up for Success!

COMPACT DESIGN - Measuring just 4.5"L x 2.5"W x 1"Th, it’s easy to store and transport.
PROUDLY AMERICAN - Manufactured in the USA, supporting local craftsmanship and quality.
ROBUST CONSTRUCTION - Crafted from high-quality steel for long-lasting performance and reliability.
EFFORTLESS INSTALLATION - Designed for quick and easy attachment, saving you time and hassle.
UNIVERSAL COMPATIBILITY - Seamlessly fits most passenger cars, ensuring you’re always ready for maintenance.

The ThextonTHE418 Grease Coupler is a universal fit auto part designed for rear applications in passenger cars. With compact dimensions of 4.5"L x 2.5"W x 1"Th and made from durable steel, this coupler ensures reliable performance and easy installation, all while proudly supporting American manufacturing.

Specifications

Auto Part Position	Rear
Fit Type	Universal Fit
Compatible with Vehicle Type	Passenger Car
Item Dimensions L x W x Thickness	4.5"L x 2.5"W x 1"Th
Color	Neutral
Material Type	steel

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