C.S. Osborne manufactures a few different series of pre-curved needles
These needles were designed for upholstery work, but some like them for inseaming and outseaming in place of bristles.
Straight C.S. Osborne harness needles, such as the 517 series, can also be heated and bent.
| Series | Model | Point | Size | Gauge | Eye to Point | UPC | Description | Notes |
|---|---|---|---|---|---|---|---|---|
| 513 | 2 | Round | 2″ | 19 | 1½″ | 15196 | Cord Light | |
| 513 | 2½ | Round | 2½″ | 19 | 1¾″ | 15198 | Cord Light | |
| 513X | 2 | Round | 2″ | 23 | 1½″ | 15192 | Cord Extra Light | |
| 513X | 2½ | Round | 2½″ | 23 | 1¾″ | 15194 | Cord Extra Light | |
| 501X | 2 | Round | 2″ | 21 | 1½″ | 15112 | Extra Light | |
| 501X | 2½ | Round | 2½″ | 20 | 1¾″ | 15114 | Extra Light | |
| 501X | 3 | Round | 3″ | 19 | 2″ | 15116 | Extra Light | Broke repeatedly inseaming with 5- and 7-cord hemp thread. |
| 501X | 3½ | Round | 3½″ | 18 | 2⅜″ | 15118 | Extra Light | |
| 501X | 4 | Round | 4″ | 18 | 2¾″ | 15120 | Extra Light | |
| 521 | 40mm | Round | 1 9/16″ | 24260 | Silk/Billiar |
| Stated Length | Eye to Point |
|---|---|
| 2″ | 1½″ |
| 2½″ | 1¾″ |
| 3″ | 2″ |
| 3½″ | 2⅜″ |
| 4″ | 2¾″ |
| 5″ | 3⅜″ |
| 6″ | 4″ |
| 7″ | 4¾″ |
| 8″ | 5¼″ |
| 9″ | 6″ |
| 10″ | 6¾″ |