It is not standard size, it was too small for my bathroom sink.

Has anyone else experienced the rod past the ball stop being too long and catching on the far side of the drain keeping the rod from full range?

Yes, I ran into this problem with Keeney Mfg pop-up drain assemblies that I recently purchased at Lowe's. (They come with their own pivot joints but I've sometimes raided them to replace old deteriorated joints in existing drains.) The part of the rod extending from the ball into the drain is too long (about 1-7/16") and stuck, scraping against the inside wall of the drain, when lowering the pop-up stopper. I was not strong enough to push the ball closer to the end of the rod - it is very tight. It did fit, however, in the older Keeney Mfg drain that I was replacing - apparently the inner diameter of that drain, which I purchased in 2015, is just a bit larger. So I was able to successfully use these replacement pivot joints, but only in my older drains, not in my newer Keeney drains.

So, kerry-plp, "manufacturer", is the exact diameter 9/16 or 5/8 inch? since you've responded with both answers, what do the design drawings say?

Here is a correct. The ball diameter is 5/8".

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MP53280 Joint Rod, 6-1/2 In. Length, Fits Ez-Flo and ProValve Faucets (Single Pack), Zinc

Product ID: 183405832

Details

Material
Brass Plastic
Brand
PRIME-LINE
Color
Zinc
Item Weight
0.04 Kilograms
UPC
049793214386

🔩Durable brass & zinc build

⚙️Smooth plastic pivot ball

🛠️6.5-inch precision fit

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฿462

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Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Upgrade your faucet game with precision and durability!

OPTIMAL LENGTH - 6.5-inch rod designed for precise and reliable pop-up drain control
PREMIUM MATERIALS - Crafted with corrosion-resistant brass and zinc for long-lasting durability
EFFORTLESS OPERATION - Plastic pivoting ball ensures smooth, snag-free movement every time
PERFECT COMPATIBILITY - Seamlessly fits EZ-Flo & ProValve faucets for hassle-free upgrades
SINGLE PACK CONVENIENCE - Ready-to-install, one-piece set for quick faucet maintenance

The Prime-Line MP53280 Joint Rod is a 6.5-inch zinc and brass pop-up rod designed specifically for EZ-Flo and ProValve faucets. Featuring a plastic pivoting ball for smooth operation, this single-pack component offers a durable, corrosion-resistant solution for easy faucet drain repairs and upgrades.

Specifications

Material	Brass, Plastic
Brand	PRIME-LINE
Color	Zinc
Item Weight	0.04 Kilograms
UPC	049793214386
Global Trade Identification Number	00049793214386
Number of Items	1
Manufacturer	Prime-Line
Part Number	MP53280
Item Weight	1.34 ounces
Product Dimensions	1.05 x 2.56 x 8.67 inches
Item model number	MP53280
Size	6-1/2 in.
Item Package Quantity	1
Included Components	Pop-Up Rod
Batteries Included?	No
Batteries Required?	No

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