20 Pcs M6x18mm Metric Ribbed Body Rivet Nut Rivnuts Threaded Insert Nutserts

��?Flat?head?cap?screws ?M6?female?thread?diameter ?18mm?total?length ?zinc?plated?surface carbon?steel?rivet?nut. ��?This?Nutsert?has?a?large?flange?to?provide?increased?strength?in?punched?and?drilled?holes. ��?Knurled?body?provides?a?higher?resistance?to?spin?out?when?installed?in?soft?materials. WHAT?IS?A?? A??fastener?is?a?tubular?rivet?with?internal?threads.??It?can?be?installed?in?seconds?form?one?side?of?the work.?Once?installed ?no?finishing?work?is?required?on?the??fastener.?The?added?benefit?of?not?only?being?a?dependable?fastener ?they?are?ready?to?use?with?clean?threads?available?for?screw?attachments.?Blind?thin?sheet?materials?that?are?too?thin?for?a?tapped ?thread.?Blind?Rivet?Nuts?also?are?used?when?an?application?has?little?or?no?access?to?the?backside?as?they?can?be?installed?from?the ?front?side?of?the?work?piece.