These fasteners are manufactured from 7075 T-6 Aircraft quality cold heading wire.Fastener Dimensional Data for Metric Aluminum Socket Head Cap Screws - Blue Aluminum: (Size: 4mm)

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:

Blue Aluminum Locknuts