The ST-25 Steel Row Nail Box Heavy Frame Pin from Chaoyue (王中王/STAFDA) extends the ST-series to 24.1mm total length, maintaining the same 2.3mm heavy-gauge shank and 6.3mm flat head. It is the standard choice for solid wood picture frame corner pinning, thick timber furniture assembly, and dense panel fastening where extra depth is needed beyond the ST-18.
Greater Depth for Heavier Frames: ST-25 Steel Row Nail Box Heavy Frame Pin
When the frame profile is 20–24mm deep or when the fastened joint must resist significant mechanical stress (heavy artwork, large mirrors, thick glass), the ST-25 Steel Row Nail Box Heavy Frame Pin‘s 24.1mm length drives through the full profile and anchors securely in the receiving member.
Technical Specifications
Total length: 24.1mm | Shank dia: 2.3mm | Head dia: 6.3mm | Head height: 1.7mm | Qty: 400 pcs/box | Weight: 299g | Boxes/carton: 20 | Material: hardened steel.
Weight as Quality Indicator
At 299g per 400-nail box, the ST-25 Steel Row Nail Box Heavy Frame Pin is 31% heavier than the ST-18 box (228g), directly reflecting the extra steel per nail and the improved structural capacity.
Frame Assembly Applications
Solid oak or walnut picture frame corner joining, large-format mirror frame assembly, heavy furniture leg-to-rail joints (with glue), retail display frame construction, and custom architectural millwork.
Explore the ST-Series
Shorter: ST-18 (17.4mm) for lighter frames. Longer: ST-32 and ST-38 for the heaviest structural work. Also see our Xiong Ye UNI V-Nail range for picture frame corner assembly.
Order the ST-25 Steel Row Nail Box Heavy Frame Pin today — the heavy-gauge precision pin for demanding frame and furniture work.
