★★★★★ 5
Good
Good
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Reviewed in the United States on March 30, 2026
#4-40 Acorn Cap Nut - Stainless Steel 18-8
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
#4-40 Acorn Cap Nut - Stainless Steel 18-8Product Details : #4 40 Acorn Cap Nut Stainless Steel 18 8 Product Type: Acorn Cap Nut Thread Size: #4 40 Bolt Diameter Size: n 4 Thread Count (Pitch TPI): 40 Thread Type: Coarse Imperial Material(s): Stainless Steel 18 8 Thread Fit: Unified Standard Class 2B For any information about products, please contact us. *Photos for reference purposes only.
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Exchange/Return Notes
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4.3 ★★★★★
Based on 2144 reviews
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Product Reviews
★★★★★ 5
Great replacement parts!
Perfect fit for my 2003 Mercury Salt Water 150 2 stroke engine. Everything I needed was in the box.” “Good quality parts and saved me a lot compared to OEM.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 6, 2025
★★★★★ 5
Great brand and value for the price
high quality parts, look just like OEM, packaged well, I like that a parts list is included so that contents can be verified.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2025
★★★★★ 5
OE Quality Part
Worked perfectly. Everything needed is there.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
10 out of 10
The must do service package. This is a "fits multiple" kit so youll have some extras. The kit also includes the lower unit gear oil seals, which is awesome. I always trust quicksilver to be durable and a great value for the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2026
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