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CNS 4557 |
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| CNS Code | CNS 4557-1981 |
| Classified No. | B2291 |
| CNS English Title | Hexagon socket head cap screws; shallow head with pilot recess for wrench key |
| Chinese Title | 六角承窩短頭螺釘（具六角杆扳手導孔者） |
| Edition | 1981-04 |
| Pages | 5 |
| English Translation Price | $125.00 USD |
| Member Discount Price | Inquire us for detail |
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