เกลียวเหล็กหัวกระทะJTชุบรุ้ง
| STANDARD | ANSI |
| MATERIAL | STEEL |
| COATING | YELLOW ZINC/ BLACK |
| D (DIAMETER) | #7 | #8 | #10 |
| dk | 9.4 | 10.6 | 11.8 |
| K (HEAD THICKNESS) | 2.5 | 2.8 | 3.1 |
| m | 4.3 | 4.7 | 5.0 |
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