1 1/4"-7 Flat Head Cap Screws

1-1/4-7 Flat Head Socket Cap Screws in all available lengths, grades, materials, and finishes. This collection covers every 1-1/4-7 option in stock — use the filters to narrow by length, grade, material, and finish.

1-1/4-7 Thread Specifications

• Nominal diameter: 1.25"
• Threads per inch: 7
• Tap drill (75% thread): 1-7/64" (1.109")
• Clearance hole (close fit): 1-9/32" (1.281")
• Clearance hole (free fit): 1-5/16" (1.313")

To thread a 1-1/4-7 hole, drill with a 1-7/64" (1.109") tap drill for a standard 75% thread. For a clearance hole that the 1-1/4-7 screw passes through, use 1-9/32" (1.281") for a close fit or 1-5/16" (1.313") for a free fit. Pair with a matching 1-1/4-7 nut or tapped hole.

Orders before 12 PM ET ship same day.