สกรูหัวกลมผ่า ชุบซิงค์ Slotted Round Head Screws ZN
| STANDARD | JIS |
| MATERIAL | STEEL |
| COATING | WHITE ZINC |
| D (DIAMETER) | 1/8 | 5/32 | 3/16 | 1/4 |
| P (PICTH) | 40 | 32 | 24 | 20 |
| K (HEAD THICKNESS) | 2.2 | 2.6 | 3.2 | 4.2 |
| ck | 5.4 | 6.8 | 8.3 | 10.8 |
| n | 0.8 | 0.9 | 1.1 | 1.3 |
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