
| Size Class | Code Chamfer | L | ℓ | ℓn | ℓs | Ds | K | ℓk | No. of | ||||
| (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | flutes Type Stock | ||||||
| No.10-24UNC | P2 | SPQUNAMX | 2.5P | 60 | 13 | 22 | 33 | 5.5 | 4.5 | 7 | 3 | 3 | △ |
| No.10-32UNF | P2 | SPQUNAJX | 2.5P | 60 | 13 | 22 | 33 | 5.5 | 4.5 | 7 | 3 | 3 | △ |
| 1/4-20UNC | P2 | SPQU04NX | 2.5P | 62 | 15 | 26 | 33 | 6 | 4.5 | 7 | 3 | 3 | △ |
| 1/4-28UNF | P2 | SPQU04KX | 2.5P | 62 | 15 | 26 | 33 | 6 | 4.5 | 7 | 3 | 3 | △ |
| 5/16-18UNC | P2 | SPQU05OX | 2.5P | 70 | 19 | - | 36 | 6.2 | 5 | 8 | 3 | 5 | △ |
| 5/16-24UNF | P2 | SPQU05MX | 2.5P | 70 | 19 | - | 36 | 6.2 | 5 | 8 | 3 | 5 | △ |
| 3/8-16UNC | P2 | SPQU06PX | 2.5P | 75 | 23 | - | 38 | 7 | 5.5 | 8 | 3 | 5 | △ |
| 3/8-24UNF | P2 | SPQU06MX | 2.5P | 75 | 23 | - | 38 | 7 | 5.5 | 8 | 3 | 5 | △ |
| 7/16-14UNC | P3 | SPRU07QX | 2.5P | 82 | 26 | - | 42 | 8.5 | 6.5 | 9 | 3 | 5 | △ |
| 7/16-20UNF | P2 | SPQU07NX | 2.5P | 82 | 26 | - | 42 | 8.5 | 6.5 | 9 | 3 | 5 | △ |
| 1/2-13UNC | P3 | SPRU08RX | 2.5P | 88 | 26 | - | 45 | 10.5 | 8 | 11 | 3 | 5 | △ |
| 1/2-20UNF | P2 | SPQU08NX | 2.5P | 88 | 26 | - | 45 | 10.5 | 8 | 11 | 3 | 5 | △ |
| 5/8-11UNC | P3 | SPRU10UX | 2.5P | 95 | 26 | - | 48 | 12.5 | 10 | 13 | 3 | 5 | △ |
| 5/8-18UNF | P2 | SPQU10OX | 2.5P | 95 | 26 | - | 48 | 12.5 | 10 | 13 | 3 | 5 | △ |
| 3/4-10UNC | P3 | SPRU12VX | 2.5P | 105 | 33 | - | 50 | 15 | 12 | 15 | 4 | 6 | △ |
| 3/4-16UNF | P3 | SPRU12PX | 2.5P | 105 | 33 | - | 50 | 15 | 12 | 15 | 4 | 6 | △ |
| 7/8-9UNC | P3 | SPRU14WX | 2.5P | 115 | 33 | - | 55 | 17 | 13 | 16 | 4 | 6 | △ |
| 7/8-14UNF | P3 | SPRU14QX | 2.5P | 115 | 33 | - | 55 | 17 | 13 | 16 | 4 | 6 | △ |
| 1 -8UNC | P3 | SPRU16XX | 2.5P | 125 | 39 | - | 58 | 19 | 15 | 18 | 4 | 6 | △ |
| 1 -12UNF | P3 | SPRU16SX | 2.5P | 125 | 39 | - | 58 | 19 | 15 | 18 | 4 | 6 | △ |
For Whitworth Threads
| Size Class | Code Chamfer | L | ℓ | ℓn | ℓs | Ds | K | ℓk | No. of | ||||
| (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | flutes Type Stock | ||||||
| 3/16W24 | P2 | SPQW03MX | 2.5P | 60 | 13 | 21 | 33 | 5.5 | 4.5 | 7 | 3 | 3 | △ |
| 1/4W20 | P2 | SPQW04NX | 2.5P | 62 | 15 | 26 | 33 | 6 | 4.5 | 7 | 3 | 3 | △ |
| 5/16W18 | P2 | SPQW05OX | 2.5P | 70 | 19 | - | 36 | 6.2 | 5 | 8 | 3 | 5 | △ |
| 3/8W16 | P2 | SPQW06PX | 2.5P | 75 | 23 | - | 38 | 7 | 5.5 | 8 | 3 | 5 | △ |
| 7/16W14 | P3 | SPRW07QX | 2.5P | 82 | 26 | - | 42 | 8.5 | 6.5 | 9 | 3 | 5 | △ |
| 1/2W12 | P3 | SPRW08SX | 2.5P | 88 | 26 | - | 45 | 10.5 | 8 | 11 | 3 | 5 | △ |
| 5/8W11 | P3 | SPRW10UX | 2.5P | 95 | 26 | - | 48 | 12.5 | 10 | 13 | 3 | 5 | △ |
| 3/4W10 | P3 | SPRW12VX | 2.5P | 105 | 33 | - | 50 | 15 | 12 | 15 | 4 | 6 | △ |
| 7/8W9 | P3 | SPRW14WX | 2.5P | 115 | 33 | - | 55 | 17 | 13 | 16 | 4 | 6 | △ |
| 1 W8 | P3 | SPRW16XX | 2.5P | 125 | 39 | - | 58 | 19 | 15 | 18 | 4 | 6 | △ |