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| Title | The date | Reading times | |||||
 Enterprise information | Screw head shapes |
2015-05-07 | 40 | |||||
(a) pan, (b) dome (button), (c) round, (d) truss (mushroom), (e) flat (countersunk), (f) oval (raised head)
Pan head A low disc with chamfered outer edge
Button or dome head ... | |||||||
| Enterprise information | Types of screw drives |
2015-05-07 | 32 | |||||
| Main article: List of screw drives
Common types External types External drives are characterized by a female tool and a male fastener. A screw drive is the system used to turn a screw. At ... | |||||||
| Enterprise information | Thread standards |
2015-05-07 | 44 | |||||
| Main article: Screw thread
There are many systems for specifying the dimensions of screws, but in much of the world the ISO metric screw thread preferred series has displaced the many older sys... | |||||||
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