The 5J31 Blind RIV ALM Open WT 4.0x15mm is a precision blind rivet engineered for demanding applications requiring reliable fastening without access to the reverse side. Featuring a 4.0mm diameter and 15mm length, this aluminium rivet delivers consistent performance across sheet metal, composite, and lightweight structural assemblies. The open mandrel design ensures controlled setting with minimal noise and vibration, making it ideal for aerospace, automotive, and industrial manufacturing environments. Superior shear and tensile strength characteristics provide durable, vibration-resistant joints that maintain integrity under operational stress. Stock this essential fastener for professional-grade assembly work.