Classification Of Titanium Fasteners
Titanium fasteners are classified by function, head or drive, thread, material grade, dimensional standard and joint requirement. A product name such as “titanium screw” is not enough for quotation or engineering approval.
Functional Classification
| Family | Examples | Critical controls |
|---|---|---|
| Bolts | Hex, socket, carriage and drawing-specific bolts | Head, shank, thread length and mating nut |
| Screws | Countersunk, pan, socket and machine screws | Drive, bearing surface, engagement and installed profile |
| Studs | Full-thread and double-end studs | End definition, engagement and exposed length |
| Nuts and washers | Hex, lock, prevailing-torque nuts and flat washers | Mating thread, locking mechanism and bearing area |
Material and Thread Classification
Commercially pure and alloy titanium grades differ in strength, ductility and corrosion behaviour. State the exact material specification and condition. Thread requirements include metric or unified system, nominal diameter, pitch or threads per inch, class, handedness, thread length and any inspection gauge.
Joint Requirements Control the Selection
Head shape does not establish joint performance. The designer must evaluate preload, tightening method, galling, lubrication, mating material, engagement, fatigue, temperature, corrosion environment and resistance to loosening. Locking nuts also require operating-temperature and reuse limits.
RFQ Checklist
- Fastener family and controlled drawing or dimensional standard
- Titanium grade, material specification and supplied condition
- Thread system, diameter, pitch, class and length
- Head, drive, shank and point details
- Surface, lubrication or coating requirement
- Quantity, MTR, inspection, marking and packaging
FAQ
Can any titanium nut be paired with a titanium bolt?
No. Match thread system, diameter, pitch, class, engagement, material strength and joint design. Similar-looking threads can be incompatible, and using the same alloy on both sides can increase galling risk unless the assembly method is controlled.
Can titanium prevailing-torque lock nuts be reused?
Reuse depends on lock-nut type, temperature exposure, governing standard and measured prevailing torque. Nylon inserts and all-metal locking features have different limits; specify whether reuse is prohibited or requires verification.
Does a material test report prove dimensional compliance?
No. The MTR supports material chemistry and properties. Dimensions, threads and functional features require separate inspection against the drawing or dimensional standard.
Continue to Titanium Fastener Selection
Browse Titanium Standard Parts, review Grade 5 Countersunk Screws, or send a drawing for quotation.