Hillman 5/16 in. Diameter x 4 in. Length Heat Treated Steel Hex Head Cap Screw, Grade 8, Coarse Thread, 50-Pack
Regular price $58.99Hillman Grade 8 5/16 in. x 4 in. Hex Cap Screws (50-Pack)
Heavy-duty Hillman hex head cap screws engineered from heat-treated steel for high-strength fastening. Grade 8, coarse-thread bolts with washer face under the head deliver reliable clamping power for automotive, machinery, and construction projects.
Key Features:
- Grade 8 Strength: Heat-treated steel provides superior tensile strength for demanding applications
- Coarse Thread: Enhances grip and resists stripping in general-purpose fastening
- Washer Face Under Head: Improves load distribution and sealing
- Partially Threaded Shank: Adds shear strength where it matters
- Bulk Value Pack: 50 screws sized 5/16 in. diameter x 4 in. length
Specifications Table:
| Specification | Details |
|---|---|
| Diameter | 5/16 inch |
| Length | 4 inch |
| Material | Steel |
| Finish | Heat Treated (yellow dichromate) |
| Grade | 8 |
| Thread Type | Coarse (USS) |
| Head Style | Hex head with washer face |
| Threading | Partially threaded shank |
| Number in Package | 50 pack |
| Packaging Type | Boxed |
| Use | For use with a nut or tapped hole; tighten with wrench or drill |
| Package Dimensions (L x W x H) | 5.3 in x 4.3 in x 3.2 in |
| Package Weight | 5.2 lb |
Frequently Asked Questions (FAQ):
Q: What size and thread are these bolts?
A: They are 5/16-inch diameter by 4-inch length with coarse threads (USS).
Q: Are these fully threaded?
A: No, they are partially threaded along the shank for added shear strength.
Q: What grade and material are they?
A: Grade 8 heat-treated steel for high-strength applications.
Q: Do they have any special head features?
A: Yes, a washer face under the hex head helps create a better seal and distributes load.
Q: How many bolts are included?
A: 50 bolts per box.
Industrial Strength with Streamlined Utility
These grade 8 hex cap screws evoke a crisp, utilitarian beauty—precision lines and a confident, engineered profile. I love the subtle geometry of the hex head paired with a substantial shank, a quiet nod to performance. Decant them into a clear jar on an open shelf in the workshop for a sculptural, ready-to-work vignette. Strength this considered becomes a staple of refined, hardworking spaces.
Choose Hillman Grade 8 hex cap screws for dependable, high-strength fastening in your next build.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
