Threaded Fasteners
See Carroll Smith's Screw to Win
Contents
Standards
Metric
ISO
DIN
JIS
Inch
SAE
[grades, charts, etc...]
AN
Screw Types
Hex Head
Twelve Point
Socket Head
aka Allen® head
Shoulder Screw
Set Screw
Nut Types
Deez Nutz
Hex Nut
Weld Nut / Riv-Nut
Locknut
Locknuts resist loosening. Other methods can be used to resist loosening: lock washers, safety wire, locking adhesive, or design.
Jam Nut
Nylon Lock
Distorted Thread
Jet/K Nut
great in high temperature environments. see brakes
Castle Nut
Threaded Insert
Fastener Characteristics (how to choose)
- Initial Tensioning
- Initial Tightening Force
- Brings bolt close to "proof load"
- Deformation of threads (pic)
- Maintenance schedule
Torque Tension Calcs
Further Reading
- NASA Fastener Design Manual
- Carroll Smith's Screw to Win
