These are manufactured from 7075 Aircraft Quality Aluminum Heat treated to a T-6 condition.

Fastener Dimensional Data for Metric Aluminum Socket Head Cap Screws - Plain Aluminum:Bare Heat Treated aluminum, not recommended in applications where cosmetics are the utmost priority (Size: 3mm)

For Reference Only:

Metric Aluminum Socket Head Cap Screws - Dimensional Data
Metric Machine Screw Threads - Dimensional Data

Find Coordinating nuts and washers for your Metric Aluminum Socket Head Cap Screws below:

Nuts:

Aluminum Locknuts