Duplex Steel Slotted Flat Head Cap Screws are mainly applicable when the top of the screw head needs to be flushed with one of the gathering surfaces.
The underside of the screw head and the accompanying hole are countersunk at an 82-degree (includes angle). For frequent assembly and disassembly, Flat socket head cap screws are preferred over slotted flat head cap screws as the drive is less likely to strip with repetitive use. Duplex Steel Slotted Flat Head Cap Screws are also commonly known as “Slotted Flat Head Countersunk”.
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CSR