to join things together by fixing them in place at one or more points; to nail; to pin; to staple; to sew on

a thorn in one's side

thumbtack

cramp

peg

button magnet (to use on whiteboards, refrigerator doors etc)

stud earring

tongue ring; tongue piercing

screw

variant of 補丁|补丁[bu3 ding5]

corner bracket (for securing the corner of a picture frame etc); brad

DingTalk, business communication platform developed by Alibaba

rivet

spike

stud (for decorating clothing, shoes, belts etc)

nose stud; nose piercing

tack; thumbtack; push pin

screw

staple (stationery)

that clinches it; that's final; no two ways about it

hexagon socket head cap screw

a "screw that never rusts" – metaphor used in CCP propaganda to praise loyal, selfless contributors, famously applied to model worker Lei Feng 雷鋒|雷锋[Lei2 Feng1]