M3-0.5 X 35mm 六角穴付きボルト | フラットヘッド六角穴付きドライブ | 部分ねじ山 | クラス12.9合金鋼サーマルブラックオキサイド (300個/パック)

The partial threading on these M3 screws made aligning them in my 3D-printed jig much easier than with fully threaded ones. All 300 came neatly packed and the hex sockets are crisp, no stripping issues after several installs.

The black oxide finish on these M3 screws held up perfectly during assembly of a precision fixture—no galling even when torqued firmly into the alloy steel jig. The partial threading gave just the right grip length for a 6mm plate stack, and all 300 arrived with clean, sharp hex sockets. Exactly wha

Used a full bag of these for a custom jig build, and the hex socket drive made seating them in tight spots a breeze. The black oxide finish looks clean and held up well against minor oil exposure during assembly.