SteelZinc
838309-1000
1/4"-20 x 1/4" Cup Point Socket Set Screws / Alloy Steel / Zinc
$156.91 – $467.00
Bulk Box (1,000 pcs)
$467.00
1/4"-20 Set Screws
365 products
1/4-20 Socket Set Screws in all available lengths, grades, materials, and finishes.
1/4-20 Thread Specifications
- Nominal diameter: 0.25"
- Threads per inch: 20
- Tap drill (75% thread): #7 (0.201")
- Clearance hole (close fit): 17/64" (0.266")
- Clearance hole (free fit): 9/32" (0.281")
To thread a 1/4-20 hole, drill with a #7 (0.201") tap drill for a standard 75% thread. For a clearance hole that the 1/4-20 screw passes through, use 17/64" (0.266") for a close fit or 9/32" (0.281") for a free fit. Pair with a matching 1/4-20 nut or tapped hole.
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