1/4"-20 x 4" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
- Steel
- Black Phosphate
- 20 TPI · Coarse
- ASME B18.6.3
$117.00
$2.34 / pc
Package of 50
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Product Description
1/4"-20 x 4" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$117.00
$2.34/pc
Type F / Floorboard Thread Cutting Screws / Six-Lobe (Torx®)
Family: FTFB
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1/4"-20 x 4" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
SKU: 1464FTFB-50
Technical Specifications
Thread Size
1/4"-20
Thread Series
UNC
Thread Pitch
20 TPI
Thread Coverage
Full Thread
Thread Action
Thread Cutting
Tapping Type
Type F
Length
4"
Material
Steel
Finish
Black Phosphate
Drive
6-Lobe
Head Style
Flat Head
Standard
ASME B18.6.3
Country of Origin
Import
Point Type
Blunt Tapered
Head Diameter (in)
0.442–0.477
Measurement System
Inch
Head Height (in)
0.153
SKU
1464FTFB-50
Pilot Hole by Steel Thickness (1/4"-20)
| Steel Thickness (in) | Pilot Hole (in) | Drill Size |
|---|---|---|
| 0.083 | 0.213 | #3 |
| 0.109 | 0.219 | 7/32 |
| 0.125 | 0.221 | #2 |
| 0.140 | 0.221 | #2 |
| 0.187 | 0.228 | #1 |
| 0.250 | 0.228 | #1 |
| 0.312 | 0.228 | #1 |
| 0.375 | 0.228 | #1 |
| 0.500 | 0.228 | #1 |
Source: Machinery's Handbook, 26th ed., Table 13 (steel). It may be necessary to vary the hole size to suit a particular application.
https://www.ecomfasteners.com/products/1-4-20-x-4-type-f-floorboard-thread-cutting-screws-six-lobe-torx-flat-head-steel-black-phos · Printed