sun3
mortise and tenon (slot and tab forming a carpenter's joint)

strokes 14
radical
strokes after radical 10
卡榫 卡榫 ka3 sun3
clip; latch (on a clip-into-place component)

卯榫 卯榫 mao3 sun3
mortise and tenon (slot and tab forming a carpenter's joint)

榫头 榫頭 sun3 tou5
tenon (wooden projection to fit into a mortise)

榫销 榫銷 sun3 xiao1
dowel; carpenter's pin

榫眼 榫眼 sun3 yan3
mortise (slot cut into wood to receive a tenon)

榫凿 榫鑿 sun3 zao2
mortise chisel