Install smooth hold tight and threads hold strong. That's my feedback!
Not much else to say they simply work as they should.
Pack Of 50 Stainless Steel 5/16-Inch Standard (SAE) Nylon Insert Lock Nuts By Fullerkreg
5 Review
100-Pack Fullerkreg Stainless Steel 10-32 Nylon Insert Hex Lock Nuts - Durable & Secure Fasteners
4 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