High-quality M4 self-locking flange nut. Set of 10.

 XRAY T2
 XRAY T2R
 XRAY T2 007 US Foam-Spec Edition
 XRAY T2 007 EU Rubber-Spec Edition
 XRAY T2 008 EU Rubber-Spec 5-Cell Edition
 XRAY T2 008 EU Rubber-Spec 6-Cell Edition
 XRAY T2 008 US Foam-Spec 6-Cell Edition
 XRAY T2 009 EU Rubber-Spec 6-Cell Edition
 XRAY T2 009 US Foam-Spec 6-Cell Edition
 XRAY T2R PRO
 XRAY T3 EU Rubber-Spec Edition
 XRAY T3 US Foam-Spec Edition
 XRAY T3R
 XRAY T3 2011 Specs