齿花螺帽 CLINCH NUTS

六角锯齿螺帽 HEX SERRATED NUTS

齿形螺帽 KEP NUTS

烟齿风帽 turn cap

锯齿螺帽 serrated nut

赤齿大帽藓 Encalypta erythrodonta

帽状期齿 cap stage tooth

帽罩齿形边缘 slotted edge of cap

齿条螺丝帽 Rack nut