Sprue Bushings U Series
JBF National U series sprue bushings come hardened and ground, and feature a 43/45 RC through hardness. Please see component diagram below.
| JBF P/N | T | B | E | R |
|---|---|---|---|---|
| BW8645 | 1 25/32 | 29/32 | 5/32 | 1/2 |
| BW8649 | 2 9/32 | 1 13/32 | 5/32 | 1/2 |
| BW8653 | 2 25/32 | 1 29/32 | 5/32 | 1/2 |
| BW8657 | 3 9/32 | 2 13/32 | 5/32 | 1/2 |
| BW8661 | 3 25/32 | 2 29/32 | 5/32 | 1/2 |
| BW8646 | 1 25/32 | 29/32 | 7/32 | 1/2 |
| BW8650 | 2 9/32 | 1 13/32 | 7/32 | 1/2 |
| BW8654 | 2 25/32 | 1 29/32 | 7/32 | 1/2 |
| BW8658 | 3 9/32 | 2 13/32 | 7/32 | 1/2 |
| BW8662 | 3 25/32 | 2 29/32 | 7/32 | 1/2 |
| BW8647 | 1 25/32 | 29/32 | 5/32 | 3/4 |
| BW8651 | 2 9/32 | 1 13/32 | 5/32 | 3/4 |
| BW8655 | 2 25/32 | 1 29/32 | 5/32 | 3/4 |
| BW8659 | 3 9/32 | 2 13/32 | 5/32 | 3/4 |
| BW8663 | 3 25/32 | 2 29/32 | 5/32 | 3/4 |
| BW8648 | 1 25/32 | 29/32 | 7/32 | 3/4 |
| BW8652 | 2 9/32 | 1 13/32 | 7/32 | 3/4 |
| BW8656 | 2 25/32 | 1 29/32 | 7/32 | 3/4 |
| BW8660 | 3 9/32 | 2 13/32 | 7/32 | 3/4 |
| BW8664 | 3 25/32 | 2 29/32 | 7/32 | 3/4 |