S-PARTS A3 M4 Umbrella Head Self-Tapping Titanium Screws — L12–30mm D8.5
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S-PARTS A3 M4 Umbrella Head Self-Tapping Titanium Screws — L12–30mm D8.5 is replacement seatpost or saddle hardware offered in the sizes, lengths, models, and finishes shown in the variants. Compare the selected fastener with the original part before installation.
For this product, materials identified in the source data include TC4 titanium alloy; the listed construction or finishing methods include anodized finishes, vacuum nitriding.
Specifications and options
- Material: TC4 titanium alloy
- Construction / finish: anodized finishes, vacuum nitriding
- Listed dimensions: 30mm, 8.5mm, M4
- Model: L12mm, L14mm, L16mm, L20mm, L25mm, L30mm
- Color options: Gold, Titanium, Black, Blue, Candy, Green, Purple
Compatibility and selection
For replacement hardware, confirm the original thread diameter, thread direction where relevant, length, head shape, nut or washer arrangement, and mounting position. Similar-looking seatpost bolts can use different specifications even within the same bicycle family.
Use the exact option selected on this product page as the ordering reference. If your bicycle, seatpost, saddle, or component generation is not listed, verify compatibility before purchase.
When comparing this part with the original hardware, check more than the nominal thread size. Overall length, head diameter, shoulder shape, thread direction, mating nut or washer, and seating surface can all affect fitment. Start threaded hardware by hand and use the bicycle or component manufacturer's installation and torque guidance where applicable.
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