Brand: FATH Item: Hammer nut Series: 30 Series For Use With: All 30mm and 60mm profile T-slotted rails Material: Zinc plated steel Color: Silver Quantity per Pack: 10 Manufacturer Part Number: 096H08415 Thread Size: M4-0.7 Slot Size: 8 FATH hammer nut, silver, M4-0.7, zinc plated steel, slot size 8. Package of 10. For use with all 30mm and 60mm profile T-slotted rails. Manufacturer part number: 096H08415.