Large easy-grip phenolic knob that is excellent for either fine-adjustment or high-torque applications. Molded-in brass insert provides superior thread strength. Made in USA.

| Item | Material | Heat Treat | Finish | DFARS | RoHS |
| Fluted Knobs-Tapped with Short Hub (Phenolic) | Black phenolic plastic (glossy smooth Finish, extremely hard, electrical insulator, operating temperatures to 300°F, resistant to oils and most common chemicals) | Yes | Molded-in Brass Insert | Yes | Yes |

| A Diameter (Inch) | B (Inch) | C Diameter (Inch) | D (Inch) | E Thread (Inch) | F Thread Length (Inch) |
| 2-3/8" | 1-9/32" | 1-1/4" | 5/8" | 3/8-16" | 5/8" |