Metric Rivet seem to be good quality part and comes with all the size you commonly need.
I am a weekend warrior and it fits all my need.
Pack Of 50 Stainless Steel 5/16-Inch Standard (SAE) Nylon Insert Lock Nuts By Fullerkreg
5 Review
LOKMAN 105PC Rivet Nut Assortment Kit With Flat Head Carbon Steel Threaded Inserts - Includes 8-32UNC, 10-24UNC, 1/4"-20UNC, 5/16"-18UNC, And 3/8"-16UNC Knurled Body Rivnuts (Rivet Nut Kit 2)
10 Review
45Pcs M6 X 15Mm Zinc Plated Carbon Steel Rivet Nut Insert Nutsert - Fullerkreg
4 Review
Circuit Performance Forged Steel Extended Open End Hex Lug Nut for Custom Wheels: 12x1.5 Purple - Set of 20 + Tool
6 Review
π© 5-Pack of M8x60mm Stainless Steel External Hex Expansion Bolts by Yasorn
10 Review
Highly π Sought-After Fastener: Connector 014973445713
9 Review
POWERTEC 4 Inch 20 2 Inch QTB1005 T Slot: A Revolutionary, High-Quality Power Tool Accessory!
8 Review
π Carriage Prime Line Products GD52103
6 Review