| SKU | 7100363524 |
|---|---|
| Legacy SKU | 60450001007 |
| UPC | 00068060061577 |
| Catalog Number | 36521 |
| Product Number | 521U |
3M Hookit Blue Abrasive Disc 521U is a paper-backed abrasive disc with excellent performance and cut. It is available in a range of grades and sizes.
- Excellent cut rate and performance
- E-weight paper backing is highly durable and withstands wear, pressure and damage
- Easy and reusable hook-and-loop system
- Available in a variety of sizes and grades.
Product Dimensions |
Imperial | Metric |
| Weight | 1.464 lbs | |
|---|---|---|
| Width | 6.1248 in | |
| Length | 6.1248 in | |
| Height | 3 in | |
| Diameter | 6 in | 150 mm |
| Center Hole Diameter | 0.0 NP |
Shipping Dimensions |
|
| Weight | 6.292 lb |
|---|---|
| Length | 13.8 in |
| Width | 6.9 in |
| Height | 7.3 in |
| Color | Blue |
|---|---|
| Maximum Speed | 12,000 rpm |
PRODUCT FAQ
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How many discs come in a full case of the 3M™ Hookit™ Blue Abrasive Disc 36521?
Great question! Each case contains 4 cartons, and each carton has 50 discs, so you get a total of 200 discs per case.
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Are these abrasive discs dust-free when sanding?
Absolutely! These discs are designed to be "dust-free" thanks to their multi-hole pattern that helps capture dust effectively—making cleanup easier and keeping your workspace cleaner.
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What materials can I use the 80E grit on?
The 80E grit is perfect for heavy-duty sanding tasks like stripping paint or smoothing filler. You can use it on metals, fiberglass, plastics, and painted surfaces—it’s really versatile!
The 3M Hookit Blue Abrasive Disc 521U is expertly engineered for professional sanding applications, particularly in automotive collision repair. This versatile abrasive disc is suitable for use on a wide range of substrates, including painted surfaces, primers, metals, and composite materials. Its advanced design ensures efficient material removal, making it an ideal choice for both surface preparation and finishing tasks.
Constructed with a robust E-weight paper backing, the 3M Hookit Blue Abrasive Disc 521U delivers outstanding durability and consistent performance throughout its lifespan. The fast-cutting abrasive grains embedded in the disc allow for rapid sanding, helping you achieve smooth, even surfaces with less effort and time. This durability translates to fewer disc changes and increased productivity in your workflow.
The innovative 3M Hookit system features a convenient hook-and-loop attachment mechanism, allowing for quick and secure disc changes. This reusable attachment system not only simplifies the process of swapping discs but also ensures a firm hold during use, reducing slippage and enhancing overall efficiency. The Hookit system is designed to maximize the life of each disc, making it a cost-effective solution for your sanding needs.
- Ideal for sanding paint, primer, metal, and composite surfaces in collision repair
- Fast-cutting abrasive for efficient material removal
- Durable E-weight paper backing for long-lasting performance
- Hookit hook-and-loop attachment for easy, reusable application
- Reduces downtime with quick disc changes and extended disc life

