Qualfast: M4X25 Double Slotted Mushroom Head Screw + Nut NF BZP (GR-4.8) Metric NF E25-129 Material - Steel Class - 4.8 MPN: M4X25 Double Slotted Mushroom Head Screw + Nut NF BZP (GR-4.8) Attributes: Box Quantity: 500 Driving Features: Slotted Grade: 4.8 Head Shape: Button Head Leading Standard: NF E25-129 Length: 25 Material: Steel Surface Treatment: Zinc Plated Thread: Metric Thread Thread Direction: Right Thread Size: M4