Item # FHS1/4-20X3/4ZP
1/4-20 x 3/4" Flat Head Socket Cap Screw, Alloy, Zinc-Bake CR+3
Item # FHS1/4-20X3/4ZP
1/4-20 x 3/4" Flat Head Socket Cap Screw, Alloy, Zinc-Bake CR+3
- UM: EA
The FHS1/4-20X3/4ZP is a 1/4-20 x 3/4" alloy steel flat head socket cap screw with Zinc-Bake CR+3 finish for enhanced corrosion resistance in moderately corrosive environments. The 82° conical head sits flush with the mating surface when installed in a matching countersink, making it ideal for assemblies where surface protrusion must be eliminated. Heat treated to ASTM A574 — 170,000 PSI minimum tensile strength for sizes through 1/2", 180,000 PSI for 5/8" and larger. Drive: 3/16" hex key. Meets ASME B18.3.
| Thread | 1/4-20 |
|---|---|
| Length | 3/4" |
| Thread Series | Coarse |
| Material | Alloy Steel |
| Finish | Zinc-Bake CR+3 |
| Head Style | Flat, 82° countersink |
| Drive | Internal Hex (Allen Key) |
| Hex Key Size | 3/16" |
| Tensile Strength | 170,000 PSI min (through 1/2"); 180,000 PSI min (5/8"+) |
| Standard | ASME B18.3 / ASTM A574 |
| Part Number | FHS1/4-20X3/4ZP |
Countersink angle: This is an inch-series flat head socket cap screw and requires an 82° countersink in the mating part. Coarse thread is standard for general industrial use, offering faster assembly and better performance in blind holes. Note that metric flat head socket cap screws (DIN 7991) use a 90° countersink — do not interchange inch and metric countersink tooling.
Eugene Fastener stocks 1/4-20 flat head socket cap screws in Eugene, Oregon. Available in box and bulk quantities. Contact us for volume pricing.
Related Resources: Countersink Guide (82° vs 90°) • Torque & Hex Key Chart • Material & Grade Guide
| Diameter | 1/4 |
| Thread | 1/4-20 |
| Length | 3/4 |
| Material | Alloy Steel |
| Finish | Zinc-Bake CR+3 |
| Part Number | FHS1/4-20X3/4ZP |
| Type | Flat Head Socket Cap Screw |