Hex Head Bolt 5/16"-18 x 1-1/2" Partial thread - Stainless Steel 316 ASTM F593

Marsoni

M251S

$39.44

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

Hex Head Bolt 5/16"-18 x 1-1/2" Partial thread - Stainless Steel 316 ASTM F593Hex Head Bolt PDF Product Details : Hex Head Bolt 5 16" 18 x 1 1 2" Partial thread Stainless Steel 316 ASTM F593 Product Type: Hex Head Bolt Thread Size: 5 16" 18 Bolt Diameter: 5 16" Thread Count (Pitch): 18 Length: 1 1 2" Thread: Partial thread Thread Type: Coarse Imperial Thread Direction: Right Hand Thread Material(s): Stainless Steel 316 Finish: Plain Steel Grade Class: F593 Standards and Certifications: ASTM F593 For any information about

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This starter has failed after less than one year in use. Used for 1 month last summer then, over the winter I had my boat winterized and upon summerizing it, the starter displayed a "flat" spot where it would not crank unless turned and tried again. It now doesn't turn over my engine. I'd like a refund or replacement. Do not recommend cheap knock offs for boat parts...

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Reviewed in the United States on July 4, 2025

Verified Purchase

Benjamin

Los Angeles, US

★★★★★ 5

Good starters for the price

So I freaked out a bit when I pulled my old starter and it was a 9 tooth. But after alot of research I found out that this 11 tooth is a direct replacement. I use 2 of these on my boat. They have no problem starting a 7.4l big block. Great value for budget builds.

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Reviewed in the United States on August 11, 2023

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James V. Bailey II

Dallas, US

★★★★★ 5

Good quality

Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube

Good quality gear oil, works perfectly.

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Reviewed in the United States on April 29, 2026

Verified Purchase

Carb was beautiful once I got it tune in, cranks great runs smooth I would buy it again if needed

West Palm Beach, US

★★★★★ 5

For motorcycles

Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube

Great stuff, good price

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Reviewed in the United States on April 25, 2026

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JNL

Cuba, US

★★★★★ 5

The best lower unit gear oil I have used

Size: 32 oz, Style: 32 Fl Oz, Pattern Name: Lube

I have been boating my whole life, this is by far the best gear oil. I use this in my Johnson 115 even though this is technically made by Mercury. I seem to get less if any water intrusion into my gearcase with this oil. If there is any, the oil emulsifies the water and continues to protect the gears. I have had better luck with this than Pennzoil marine or others. Highly recommend. It is a blue color and easy to drain and fill.

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Reviewed in the United States on March 23, 2026