Brand: FATH Item: Economy T-nut Series: 15 Series For Use With: All 1.5in and 3in profile T-slotted rails Material: Zinc plated steel Color: Black Quantity per Pack: 10 Manufacturer Part Number: 096E15U1/4-20 Thread Size: 1/4-20 UNC Slot Size: 8 FATH economy T-nut, black, 1/4-20 UNC, zinc plated steel, slot size 8. Package of 10. For use with all 1.5in and 3in profile T-slotted rails. Manufacturer part number: 096E15U1/4-20.