(+) Truss Head Screw

Truss Head Screw (トラス小ねじ) features a rounded head. Compared with Pan Head Screw (なべ小ねじ), it has a lower head height but a larger head diameter.

Because the outer diameter of the truss head is larger than that of other small screws, the contact area with the material is increased, which can help improve resistance to loosening.

Applicable Standards:

JIS B 1111 Phụ lục JA, GB 406, ANSI/ASME B18.6.3