SKU: 35748383228

EXTSW 1/2-13 Tapped / Threaded ID x ( 1 1/2” / 1.490") OD x 3/4" Thick 304 SS Washer

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Description

EXTSW 1/2-13 Tapped / Threaded ID x ( 1 1/2” / 1.490") OD x 3/4" Thick 304 SS WasherEXTSW 1 2 13 Tapped threaded ID x 1 1 2 OD x 3 4" inch long 304 alloy stainless spacer, boss Actual size 1 2 13 Tapped ID x 1. 490 OD x . 750 thick (+ . 003 on all dimensions) . 030 inch Radius OD Countersunk ID (no sharp edges) Made in USA on a CNC lathe It is a beautiful fit for your 1 2 Stainless bolts Just contact me if you need a custom size washer. Some other websites will list their spacers as "18 8" or just "stainless steel". "18 8" is not an

EXTSW 1/2 -13 Tapped / threaded ID x 1 1/2” OD x 3/4" inch long 304 alloy stainless spacer, boss

Actual size 1/2-13 Tapped ID x 1.490” OD x .750 thick

(+/- .003 on all dimensions)

.030 inch Radius OD / Countersunk ID (no sharp edges)

Made in USA on a CNC lathe

It is a beautiful fit for your 1/2” Stainless bolts


Just contact me if you need a custom size washer.

 

Some other websites will list their spacers as "18-8" or just "stainless steel".

"18-8" is not an specific alloy
"Stainless steel" is not a specific alloy

WE TELL YOU THE ALLOY OF STAINLESS
"18-8" is not the same as 304 Alloy.
"18-8" is a general classification of the 300 series Stainless steel, which includes 302, 302HQ, 303, 304, 305, 384, XM7 .
 So, If some other company doesn't tell you the specific alloy, you don't know what your getting.
304 Stainless Alloy is more expensive and is harder to machine than 303. 

304 has better corrosion resistance than 303. 304 is weldable, 303 is not.
The term "18-8" has APPROXIMATELY (not exactly) 18% Chromium and 8% Nickel. 
The term "304" alloy stainless steel has a MINIMUM amount of 18% Chromium and a MINIMUM amount of 8% Nickel, COMBINED with a MAXIMUM of 0.08% Carbon. Carbon is one of the elements that will make it corrode.


Sulfur is added to the 303 alloy which makes it easier to machine, but the sulfur addition does lower Alloy 303’s corrosion resistance to below that of Alloy 304 and also makes 303 not suitable for welding.

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SKU: 35748383228

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katelyn traut
Boise, US
★★★★★ 5
Perfect fit
Worked great for a 1965 mercury thunderbolt 150hp
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Reviewed in the United States on June 3, 2025
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Lawrence Brown
Cuba, US
★★★★★ 5
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OEM quality MerCruiser Alpha 1 Gen1 replacement part. Everything you need and some things you don't because it's a universal kit that works for several models.
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Reviewed in the United States on July 19, 2025
O
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Owen Shirk
Lexington, US
★★★★★ 5
OEM is always the answer
No reason not to go OEM for this! Came with every possible gasket and seal I could need. Specifically for my Alpha One Gen 1 it took maybe 25-30 min to completely install. While you’re there check the base plate for wear and the other surrounding items like your water tube. Rather keep the lower unit off for an extra day to get another part than a catastrophic failure.
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Reviewed in the United States on September 9, 2025
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Taylor 🤍
Waukegan, US
★★★★★ 5
Husbands things
My husband bought this. I don’t know much about it but he has zero complaints. He bought it for a boat. He has fixed up 2 boats, sold one & we kept the other. So he apparently knows what to buy & how to use it.
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Reviewed in the United States on November 6, 2025
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Edward W.
Bozeman, US
★★★★★ 4
Amazon is easy and fast . No problems the oarts was exactly as described.
liked that everything was in one bag . and could make sure everything was changed .
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Reviewed in the United States on August 3, 2020

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