 Series: Whitworth Helical (External & Internal)
Series: Whitworth Helical (External & Internal) 
| Part Number | INSL Insert Length | W1 Width | S1 Thickness | THFT Thread Form Type | TTP Thread Type | TPT Thread Profile Type | TP Thread Pitch | NOI Number of Indexes | |
|---|---|---|---|---|---|---|---|---|---|
| LYER23110BW | 1.063 (27.0 mm) | 0.315 (8.0 mm) | 0.138 (3.5 mm) | WH55 - Whitworth 55° | External & Internal | Full | 11.00 | 1 | |
| LYER32110BW | 1.260 (32.0 mm) | 0.354 (9.0 mm) | 0.157 (4.0 mm) | WH55 - Whitworth 55° | External & Internal | Full | 11.00 | 1 | |
| LYER37110BW | 1.457 (37.0 mm) | 0.469 (11.9 mm) | 0.197 (5.0 mm) | WH55 - Whitworth 55° | External & Internal | Full | 11.00 | 1 | |
| LYER38110BW | 1.496 (38.0 mm) | 0.469 (11.9 mm) | 0.197 (5.0 mm) | WH55 - Whitworth 55° | External & Internal | Full | 11.00 | 1 |