볼트 너트 종류와 명칭

건축물 통신감리에서 소소하게 접하게 되는 볼트너트 종류입니다. 모양과 명칭을 알고 계시면 도움이 되리라봅니다.     <img src="https://t1.daumcdn.net/cfile/cafe/032BE235518AE92F1A" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_032BE235518AE92F1A216C"/>   <img src="https://t1.daumcdn.net/cfile/cafe/232E3935518AE93019" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_232E3935518AE9301995D3"/>   <img src="https://t1.daumcdn.net/cfile/cafe/252F5C35518AE93018" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_252F5C35518AE930185C92"/>   <img src="https://t1.daumcdn.net/cfile/cafe/0323D335518AE93022" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_0323D335518AE93022ABF5"/>   <img src="https://t1.daumcdn.net/cfile/cafe/01221D35518AE93023" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_01221D35518AE9302391DD"/>   <img src="https://t1.daumcdn.net/cfile/cafe/22234135518AE93022" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_22234135518AE93022E256"/>   <img src="https://t1.daumcdn.net/cfile/cafe/2327EF35518AE9301F" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_2327EF35518AE9301FD206"/>   <img src="https://t1.daumcdn.net/cfile/cafe/232C4035518AE9311B" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_232C4035518AE9311B2A6C"/>   <img src="https://t1.daumcdn.net/cfile/cafe/0138C735518AE9310F" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_0138C735518AE9310FD300"/>   <img src="https://t1.daumcdn.net/cfile/cafe/24189237518AE9331D" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_24189237518AE9331D476A"/>   <img src="https://t1.daumcdn.net/cfile/cafe/261BF437518AE9331A" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_261BF437518AE9331AA555"/>   <img src="https://t1.daumcdn.net/cfile/cafe/03286937518AE9330F" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="550" border="0" hspace="1" vspace="1" width="550" id="A_03286937518AE9330FBAD2"/>