This product guide contains the specification for thread forming screws for plastics, a series of standard parts available from Westfield Fasteners. The information presented here is specific to products with a torx countersunk head and a 30° thread angle.
d | dk | k | d2 | t | T | |
---|---|---|---|---|---|---|
Min | Max | |||||
2.5 | 4.7 | 1.7 | 1.4 | 0.7 | 0.9 | 8 |
3 | 5.5 | 1.7 | 1.66 | 0.8 | 1 | 8 |
3.5 | 7.3 | 2.3 | 1.91 | 1 | 1.3 | 15 |
4 | 8.4 | 2.5 | 2.17 | 1.25 | 1.7 | 20 |
5 | 9.3 | 2.7 | 2.68 | 1.25 | 1.7 | 20 |
Material | Hole Diameter | Outer Diameter | Screw-in-depth |
---|---|---|---|
dH | dA | LE | |
ABS | 0.80 x d | 2.00 x d | 2.00 x d |
ABS/PC Blend | 0.80 x d | 2.00 x d | 2.00 x d |
ASA | 0.78 x d | 2.00 x d | 2.00 x d |
PA 4.6 | 0.73 x d | 1.85 x d | 1.80 x d |
PA 4.6 GF 30 | 0.78 x d | 1.85 x d | 1.80 x d |
PA 6 | 0.75 x d | 1.85 x d | 1.70 x d |
PA 6 GF 30 | 0.80 x d | 2.00 x d | 1.90 x d |
PA 6.6 | 0.75 x d | 1.85 x d | 1.70 x d |
PA 6.6 GF 30 | 0.82 x d | 2.00 x d | 1.80 x d |
PBT | 0.75 x d | 1.85 x d | 1.70 x d |
PBT GF 30 | 0.80 x d | 1.80 x d | 1.70 x d |
PC | 0.85 x d | 2.50 x d | 2.20 x d |
PC GF 30 | 0.85 x d | 2.20 x d | 2.00 x d |
PE LD | 0.70 x d | 2.00 x d | 2.00 x d |
PE HD | 0.75 x d | 1.80 x d | 1.80 x d |
PET | 0.75 x d | 1.85 x d | 1.70 x d |
PET GF 30 | 0.80 x d | 1.80 x d | 1.70 x d |
PMMA | 0.85 x d | 2.00 x d | 2.00 x d |
POM | 0.75 x d | 1.95 x d | 2.00 x d |
POM GF 30 | 0.80 x d | 1.95 x d | 2.00 x d |
PP | 0.70 x d | 2.00 x d | 2.00 x d |
PP GF 30 | 0.72 x d | 2.00 x d | 2.00 x d |
PP TV 20 | 0.72 x d | 2.00 x d | 2.00 x d |
PPO | 0.85 x d | 2.50 x d | 2.50 x d |
PS | 0.80 x d | 2.00 x d | 2.00 x d |
PVC (hart) | 0.80 x d | 2.00 x d | 2.00 x d |
PEEK | 0.85 x d | 2.00 x d | 2.00 x d |
SAN | 0.77 x d | 2.00 x d | 2.00 x d |