


Single Lip Nitrile Rotary Shaft Seal (3.313x4.5x0.438 Inch)
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Single Lip Nitrile Rotary Shaft Seal (3.313x4.5x0.438 Inch)Acrylonitrile butadiene rubber (NBR) is the material name for nitrile rubber. This material is very good for seals due to its make up. Nitrile rubber can tolerate short term dry running of the sealing lip. The operating temperature range without failure of nitrile rubber is 40 to +100 C. This also offers a special nitrile rubber compound with a temperature range between 55 and +110 C. Please click here for a full in depth look at the range of seals
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.5 ★★★★★
Based on 2455 reviews
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Product Reviews
★★★★★ 5
Great socks!
Size: Medium, Color: Black
I love these socks. Very soft and comfortable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 21, 2026
★★★★★ 5
Good socks
Size: Medium, Color: Black
Socks wear reasonably well. They are comfortable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 4, 2026
★★★★★ 5
Very comfy
Size: X-Large, Color: White
I'm a size US Mens 14 with huge calves. Finding comfortable crew socks can be somewhat difficult.
These are extremely comfortable, very stretchy and soft. Very worth the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 4, 2025
★★★★★ 5
I use these exclusively for when I'm hiking, cycling and walking ( exercising )
Size: X-Large, Color: Black
5.7.2019 Update:
I have probably five packs of 3 of these socks. Can't explain it but recent pairs I've been using have lasted longer than previous two packs ( 6 socks )... So I'm going to get some more...
They are my #1 go to sock for cycling, hiking, climbing, walking ( serious, training, speed, distance )...
10.30.19:
I use these exclusively for when I'm hiking, cycling anqd walking ( exeqrcising )...
They are light, comfortable, keep feet dry, cool & comfortable... They don't shift around on feet. They stay put once put on and running, climbing or cycling shoes are put on and laced up or ratched...
I do a lot of hill climbing and also use on terrain where there's lots of long periods ( hours ) going up & hours going down...
They don't appear to be very durable, get holes in toe or holes in heels, but 3 pack is relatively inexpensive so I continue to buy them.
I do not use them for everyday casual wear because they would wear out very quickly compared to other similar sockets...
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 30, 2018
★★★★★ 4
These socks are just OK. One arrived with a ...
These socks are just OK. One arrived with a hole (easily sewn up, but kind of bummed about that). I prefer the Under Armour Resistor socks - they have support built into the socks that you actually can feel, and they were same price for 6 pairs!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2017
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