Head Seal 5.250" x 5.000" x 0.187" - Polyurethane

Marsoni

M251S

$36.52

Get it in 3 business days with 1 day shipping. Friday, May 29

Head Seal 5.250" x 5.000" x 0.187" - PolyurethaneProduct Details : Head Seal 5. 250" x 5. 000" x 0. 187" Polyurethane Part No: HS12 250 U92 Product Category: O Rings Product Type: Head Seal Material(s): Polyurethane Material Code: AU Durometer: 92A Temperature Range: 40F to +250F ( 40C to +121C) Pressure Range: ? 5000 PSI (? 345 Bar) System Of Measurement: Inch Replaces O Ring: 250 Bore Diameter: 5. 250" Dimensions: 5. 250" x 5. 000" x 0. 187" Nominal I. D. (d): 5. 000" Nominal O. D. (D): 5. 250"

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So these are awesome but they are slightly thinner than older versions, shorter too. Just FYI if you a long time UA customer. If you have never had their socks, I love them personally and only like one other brand better. They aren’t overly thick and they allow your feet to breath. I never have sweaty feet in these even in my warm boots. I also like that they don’t cut into my feet or get holes in the toes over long terms. The only reason I’ve thrown these out has been fraying near the ankle or someone (kids) thieving them.

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Reviewed in the United States on December 28, 2019

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Randy Deasy

Houston, US

★★★★★ 5

Not to thick or thin well made

Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone

I bought pink so as not to lose when doing laundry with my daughter who steels all socks lol!

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Reviewed in the United States on May 8, 2026

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Stacey Cohick

Omaha, US

★★★★★ 5

Perfect

Size: X-Large, Color: (601) Bittersweet Pink / Stone / Stone

They were perfect

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Reviewed in the United States on April 27, 2026

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Susan Brown

Fort Morgan, US

★★★★★ 5

Very Comfortable!

Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone

Very comfortable. Don’t slip off back of heal. Love the colors.

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Reviewed in the United States on March 25, 2026

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C. V.

Lowell, US

★★★★★ 5

😊

Size: Medium, Color: (601) Bittersweet Pink / Stone / Stone

These are really nice except I don’t like all the colors of them so I’m getting different ones same company just different colors. I don’t like the thick ones these are perfect.. 🤩

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Reviewed in the United States on February 24, 2026