Hillman 5/16 in. Diameter x 3-1/2 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 50-Pack
Regular price $40.99Hillman Grade 5 Zinc Hex Head Cap Screws, 5/16 in. x 3-1/2 in., 50-Pack
These Grade 5 hex head cap screws from Hillman deliver reliable fastening strength for automotive, machinery, and general construction projects. Made of steel with a heat-treated zinc finish, they resist wear while the washer-faced head provides a better seal.
Key Features:
- Grade 5 Strength: Heat-treated steel provides higher tensile strength for demanding applications
- Corrosion-Resistant Finish: Zinc plating helps protect against rust and wear
- Washer-Faced Hex Head: Flat bearing surface under head improves sealing and load distribution
- Partially Threaded Shank: Adds shear strength while allowing precise clamping
- Coarse Thread Compatibility: Ideal for quick assembly and strong hold with standard nuts
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Hillman |
| Diameter | 5/16 inch |
| Length | 3-1/2 inch |
| Material | Steel |
| Finish | Heat-treated zinc |
| Grade | Grade 5 |
| Head Type | Hex head with washer face |
| Thread Type | Coarse |
| Threading | Partially threaded along shank |
| Units | Imperial |
| Pieces per Pack | 50 |
| Packaging Type | Boxed |
Frequently Asked Questions (FAQ):
Q: Are these fully threaded?
A: No. They are Grade 5 hex cap screws with a partially threaded shank.
Q: What size are these screws?
A: They are 5/16 inch diameter by 3-1/2 inch length.
Q: What material and finish?
A: Steel with a heat-treated zinc finish for added strength and wear resistance.
Q: What thread type do they use?
A: Coarse thread.
Q: How many are in the box?
A: 50 pieces per pack.
Industrial polish with purposeful strength
I love how these zinc-kissed hex cap screws bring a refined industrial note to projects—sleek, resilient, and unapologetically functional. The washer-faced head is a subtle design detail that reads clean while working hard behind the scenes. Style them with raw woods and matte black hardware for a balanced, tailored contrast. They’re the quiet essential that elevates craftsmanship to a luxe finish.
Choose these Hillman Grade 5 hex cap screws for dependable strength and a clean, corrosion-resistant finish on your next build.
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