Flat washers with enhanced thickness for Grade 8 bolt applications. Available in both USS and SAE patterns for high-load distribution and torque control.
These premium alloy steel flat washers are engineered for high-strength Grade 8 applications. Featuring zinc yellow plating with Hexavalent Chromate, they offer increased resistance to dishing and distortion. The upgraded close-fitting I.D. enhances load-bearing capability, while the robust thickness profile meets or exceeds SAE specifications. Manufactured in the U.S.A., these washers are available in both USS and SAE patterns:
| Bolt Size | No. | Qty | Inner Dia. | Outer Dia. | Thickness (“T”) | Pattern |
|---|---|---|---|---|---|---|
| 1/4 | 37-3804* | 100 | 9/32 | 3/4 | 5/64 | USS |
| 5/16 | 37-3805* | 100 | 11/32 | 7/8 | 1/8 | USS |
| 3/8 | 37-3806* | 100 | 13/32 | 1″ | 3/32 | USS |
| 7/16 | 37-3807* | 100 | 15/32 | 1-1/4 | 3/32 | USS |
| 1/2 | 37-3808* | 50 | 17/32 | 1-3/8 | 1/8 | USS |
| 9/16 | 37-3809* | 50 | 19/32 | 1-1/2 | 1/8 | USS |
| 5/8 | 37-3810* | 25 | 21/32 | 1-3/4 | 5/32 | USS |
| 3/4 | 37-3812* | 25 | 13/16 | 2″ | 5/32 | USS |
| 7/8 | 37-3814* | 10 | 15/16 | 2-1/4 | 3/16 | USS |
| 1″ | 37-3816* | 10 | 1-1/32 | 2-1/2 | 9/64 | USS |
| 1-1/8 | 37-3818* | 5 | 1-1/4 | 2-3/4 | 9/64 | USS |
| 1-1/4 | 37-3820* | 5 | 1-3/8 | 3″ | 9/64 | USS |
| 1-1/2 | 37-3824* | 5 | 1-5/8 | 3-1/2 | 9/64 | USS |
| 1/4 | 37-3904* | 100 | 9/32 | 5/8 | 5/64 | SAE |
| 5/16 | 37-3905* | 100 | 11/32 | 11/16 | 3/32 | SAE |
| 3/8 | 37-3906* | 100 | 13/32 | 13/16 | 3/32 | SAE |
| 7/16 | 37-3907* | 50 | 15/32 | 15/16 | 3/32 | SAE |
| 1/2 | 37-3908* | 50 | 17/32 | 1-1/16 | 7/64 | SAE |
| 9/16 | 37-3909* | 50 | 19/32 | 1-3/16 | 7/64 | SAE |
| 5/8 | 37-3910* | 25 | 21/32 | 1-5/16 | 9/64 | SAE |
| 3/4 | 37-3912* | 25 | 13/16 | 1-1/2 | 3/16 | SAE |
| 7/8 | 37-3914* | 10 | 15/16 | 2″ | 9/64 | SAE |
| 1″ | 37-3916* | 10 | 1-1/32 | 2-1/4 | 9/64 | SAE |
| 1-1/4 | 37-3920* | 5 | 1-3/8 | 2-1/2 | 5/32 | SAE |
| 1-1/2 | 37-3924* | 5 | 1-5/8 | 3″ | 5/32 | SAE |
| 2″ | 37-3932* | 5 | 2-1/8 | 3-1/2 | 11/64 | SAE |
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.