Hillman 5/16 in. D x 1-1/4 in. L Heat-Treated Steel Grade 8 Hex Head Cap Screws, Coarse Thread (100-Pack)
Regular price $43.99Hillman Grade 8 Hex Head Cap Screws, 5/16 in. x 1-1/4 in. (100-Pack)
Heavy-duty Grade 8 hex head cap screws built from heat-treated steel for high-strength fastening. Coarse thread with washer face under the head provides secure clamping and reliable torque in machinery, automotive, and construction applications.
Key Features:
- Grade 8 Strength: Heat-treated steel delivers high tensile strength for demanding applications
- Washer Face Under Head: Improves load distribution and sealing for a solid clamp
- Coarse Thread: Promotes quick starts and strong holding in tapped holes or with nuts
- Precise Sizing: 5/16 in. diameter x 1-1/4 in. length, partially threaded shank
- Bulk Value: Box of 100 screws for shop, jobsite, or inventory needs
Specifications Table:
| Specification | Details |
|---|---|
| Diameter | 5/16 inch |
| Length | 1-1/4 inch |
| Head Type | Hex head, washer face under head |
| Material | Steel |
| Grade | Grade 8 |
| Finish | Heat-treated; yellow dichromate noted |
| Thread Type | Coarse (USS) |
| Threading | Partially threaded shank |
| Units per Package | 100 pack |
| Packaging Type | Boxed |
Frequently Asked Questions (FAQ):
Q: Are these fully or partially threaded?
A: They are partially threaded along the shank.
Q: What thread type do these use?
A: Coarse thread (USS).
Q: What grade are the screws?
A: Grade 8, heat-treated for high strength.
Q: What materials are they made from?
A: Steel, heat-treated; yellow dichromate finish noted on the packaging line.
Q: What tools do I need to install them?
A: Tighten with a wrench or compatible socket; can also be driven with a drill and socket adapter.
Industrial Strength, Clean Hardware Finish
These hex cap screws bring a quiet, engineered rigor to your projects—sleek, purposeful, and impeccably strong. The faceted head and washer face create a crisp, tailored look against metal or hardwood. Style them with blackened brackets or raw steel accents for a refined utilitarian statement. Consider them the discreet luxury essential that keeps bold design securely in place.
Secure your builds with Grade 8 confidence—add this 100-pack to your cart and finish the job right.
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