NINGBO S&D METALWORK CO.,LTD



| Heavy Series | ||||||
| Bolt Size | A | B | C | D | E | R |
| Thickness | Bottom Inside Dia. | Bottom Outside Dia. | Top Inside Dia. | Top Outside Dia. | Radius | |
| +/- 1/32 | Ref. | Ref. | Ref. | |||
| 1/2'' | 1/2'' | 5/8'' | 2-3/8'' | 3/4'' | 1-3/8'' | 1/2'' |
| 5/8'' | 5/8'' | 3/4'' | 2-3/4'' | 7/8'' | 1-5/8'' | 5/8'' |
| 3/4'' | 3/4'' | 7/8'' | 3'' | 1'' | 1-7/8'' | 5/8'' |
| 1'' | 1'' | 1-1/8'' | 4'' | 1-1/4'' | 2-1/2'' | 3/4'' |
| Light Series | ||||||
| Bolt Size | A | B | C | D | E | R |
| Thickness | Bottom Inside Dia. | Bottom Outside Dia. | Top Inside Dia. | Top Outside Dia. | Radius | |
| +/- 1/32 | Ref. | Ref. | Ref. | |||
| 7/8'' | 7/8'' | 1'' | 3-1/2'' | 1-1/8'' | 2'' | 3/4'' |
| 1-1/8'' | 1-1/8'' | 1-1/4'' | 4-1/4'' | 1-3/8'' | 2-1/2'' | 1'' |
| 1-1/4'' | 1-1/4'' | 1-3/8'' | 4-1/2'' | 1-1/2'' | 2-1/2'' | 1'' |
| 1-1/2'' | 1-1/2'' | 1-5/8'' | 5-1/4'' | 1-3/4'' | 2-3/4'' | 1'' |