Easy
Less than 15 minutes
This replacement blade screw is an authentic OEM part, not an aftermarket equivalent. It is used on Ridgid and Ryobi circular saws to secure the blade. This hex socket head screw can be install or remove with an allen wrench or a regular socket wrench. Please note, this piece of hardware is sold individually.
Blade Screw (5/16-18 X 9/16 In 660988001
OEM part for: Ridgid, Ryobi
Part Number: 660988001
$5.19
In Stock
Order within the next 2 hours and your part ships today! 
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Frequently Purchased Together ?
Compatibility
This part will fit the following 9 machines
Ridgid
R3202 Circular Saw View Diagrams & Manuals
R32021 Circular Saw View Diagrams & Manuals
Ryobi
CSB124 7-1/4-In. Circular Saw View Diagrams & Manuals
CSB124G CSB124G 7-1/4-In. Circular Saw View Diagrams & Manuals
CSB125 CSB125 7-1/4-In. Circular Saw View Diagrams & Manuals
CSB134L CSB134L 7-1/4-In. Circular Saw View Diagrams & Manuals
CSB135L CSB135L 7-1/4-In. Circular Saw View Diagrams & Manuals
CSB143LZK CSB143LZK 7-1/4-In. Circular Saw View Diagrams & Manuals
CSB144LZ CSB144LZ 7-1/4-In. Circular Saw View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Circular Saw Parts
- Saw Parts
Customer Part Reviews ?
Average Rating (out of 5):
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I always get the part.
I have never not gotten the part(s) I was seeking when shopping at eParts. From a small bolt to blade covers or roving knife. Parts are easy to find and arrive soon after ordering.
Guest -
July 21, 2023
Verified Purchase
Website easy to use
I needed several specific parts to repair an older but excellent circular saw with hard to find parts. Easily got the parts here by putting in the brand and model. A detailed schematic illustrated what I needed. Saw fixed rather than throwing in the trash. Thank you!
Guest -
April 15, 2021
Verified Purchase
Yes
Good
Guest -
March 23, 2020
Verified Purchase
Easy to find the right part
They made it easy to find the right part, and delivered it properly. Shipping was expensive though (cost more than the part.)
Guest -
May 15, 2023
Verified Purchase
EXACT part I needed!
This screw, for my Ridgid circ saw, is made a "little funny", because he shoulders are not square. After a few years of changing blades I finally had to replace the screw that holds the blade on. eReplacementParts had the exact screw needed to replace the one with the rounded off shoulders.
The part was $3.99. Shipping was $6.32, 50% MORE than the price of the screw.
Luckily, I could afford to pay $10.31 for this stupid screw, BUT I am pretty offended that eReplacementParts couldn't ship more reasonably.
I used to ship around the world all the time, and I would always take a few minutes (because that's all it takes) to find the cheapest way. At least I got the original replacement screw, for whatever that's worth.
But that's the reason for 4 stars instead of 5.
Guest -
January 2, 2021
Verified Purchase
replacement parts
The exploded diagram provided me with the information to purchase all the replacement parts I needed to get my tool back into working condition and all the parts were here in less than a week.
Guest -
March 7, 2020
Verified Purchase
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Verified Purchase
eReplacementParts Team
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Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
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We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Blade Screw (5/16-18 X 9/16 In
will this bolt fit this saw to hold blade
Jimmy and Tillie
for model number R8654
asked on 2024-01-02
Hello Jimmy and Tillie, Thank you for your inquiry. We do not show this part will fit your model. The compatible part number is 693912001. Good luck with your repair.
eReplacementParts Team January 02, 2024
will this bolt fit saw to hold blade
Jimmy and Tillie
for model number R8654
asked on 2024-01-02
Hello Jimmy and Tillie, Thank you for contacting us. We do not show this part as compatible. The compatible part number is 693912001. We hope this helps.
eReplacementParts Team January 02, 2024
Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
I purchased this saw at a yard sale, and these parts were missing
G. - July 14, 2016
👍 2 of 2 people found this instruction helpful
Tool Type
Circular Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Just replaced the missing parts
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Thanks for voting and helping fellow customers!
Washer split in half
Gary - September 20, 2023
Tool Type
Circular Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, None
Replaced the washer
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Thanks for voting and helping fellow customers!
Missing arbor nut/screw
Benjamin - May 16, 2019
Tool Type
Circular Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Nutdriver
Installed blade washers and blade screw and attached blade.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Part missing from my circular saw.
Michael - June 22, 2016
👍 0 of 1 people found this instruction helpful
Tool Type
Circular Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
I installed the missing outer blade washer and the blade screw. I ordered the edge guide kit for future use. Thank you
Did you find this story helpful?
Thanks for voting and helping fellow customers!
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
