ドア金具

Reference Standard: Relevant material and performance testing standards; the available BT-S911 catalog record does not identify a specific standard. Hex head screws can look deceptively simple in a catalog, but accurate sourcing depends on separating what is explicitly listed from what a familiar screw name may seem to imply. For BT-S911, the catalog identifies the item as a Hexagon Head Screw, gives two listed size options—10 mm × 25 mm and 10 mm × 40 mm—and states the finish as galvanized. :contentReference[oaicite:0]{index=0} The practical rule is straightforward: use BT-S911 + the required listed size + galvanized finish as the identification baseline. Do not automatically add washer-head geometry, self-drilling capability, thread … 続きを読む