These zinc-plated carbon steel lock washers are manufactured for use with Grade 5 bolts. Engineered for durability and corrosion resistance, they offer dependable locking performance across a wide range of sizes.
| Bolt Size | Width (W) | Thickness (T) | No. | Qty. 100 | Qty. 50 |
|---|---|---|---|---|---|
| #4 | .038 | .025 | 37-4500 | 100 | – |
| #6 | .047 | .031 | 37-4501 | 100 | – |
| #8 | .056 | .040 | 37-4502 | 100 | – |
| #10 (3/16) | .062 | .047 | 37-4503 | 100 | – |
| #12 | .070 | .056 | 37-4504 | 100 | – |
| 1/4 | .109 | .062 | 37-4505 | 100 | 37-45042 (Qty 500) |
| 5/16 | .125 | .078 | 37-4506 | 100 | 37-45051 |
| 3/8 | .141 | .094 | 37-4507 | 100 | 37-45061 |
| 7/16 | .156 | .109 | 37-4508 | 100 | 37-45081 |
| 1/2 | .171 | .125 | 37-4509 | 100 | 37-45091 |
| 9/16 | .188 | .141 | 37-4510 | 50 | 37-45101 |
| 5/8 | .203 | .156 | 37-4511 | 50 | 37-45111 |
| 3/4 | .234 | .188 | 37-4512 | 50 | 37-45121 |
| 7/8 | .266 | .219 | 37-4514 | 50 | 37-45141 |
| 1″ | .297 | .250 | 37-4516 | 50 | 37-45161 |
| 1-1/8 | .328 | .291 | 37-4518 | 10 | 37-45181 |
| 1-1/4 | .359 | .312 | 37-4520 | 10 | 37-45201 |
| 1-1/2 | .422 | .375 | 37-4524 | 10 | 37-45241 |
At GNS Industrial Supply, we don’t just deliver products—we deliver peace of mind. Unlike traditional suppliers who ship and leave the rest to you, we take a hands-on approach to your inventory management. Our team visits your location, audits your existing stock, identifies what you need, and handles the reordering process for you. We then deliver directly to your facility and restock your supply room according to your preferred system—ensuring your operation runs smoothly without overstock or downtime. It’s a smarter, more personalized way to manage industrial supplies—built for teams who don’t have time to run out of what matters.