| PartNumber | AT4153-021 | AT4153-020 | AT4153-022 |
| Description | Switch Hardware FLAT KEY FOR CKL | Switch Hardware FLAT KEY FOR CKL | Switch Hardware FLAT KEY FOR CKL |
| Manufacturer | NKK Switches | NKK Switches | NKK Switches |
| Product Category | Switch Hardware | Switch Hardware | Switch Hardware |
| RoHS | Y | Y | Y |
| Product | Hardware | Hardware | Hardware |
| Type | Key | Key | Key |
| For Use With | Keylock Switches | Keylock Switches | Keylock Switches |
| Designed for | CK Series | CK Series | CK Series |
| Packaging | Bulk | Bulk | Bulk |
| Height | 1.8 mm | 1.8 mm | 1.8 mm |
| Illumination | None | None | None |
| Length | 49.3 mm | 49.3 mm | 49.3 mm |
| Material | Brass | Brass | Brass |
| Series | CK AT | CK AT | CK AT |
| Width | 22.3 mm | 22.3 mm | 22.3 mm |
| Brand | NKK Switches | NKK Switches | NKK Switches |
| Mounting Style | Through Hole | Through Hole | Through Hole |
| Product Type | Switch Hardware | Switch Hardware | Switch Hardware |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Switch Accessories | Switch Accessories | Switch Accessories |
| Part # Aliases | AT-4153-021 | AT-4153-020 | AT-4153-022 |