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Description
Hillman 7/16 in. Diameter x 3-1/2 in. Length Heat-Treated Steel Hex Head Cap Screw, 25-PackHillman Grade 8 Hex Head Cap Screws, 7 16 in. x 3 1 2 in., 25 Pack Heavy duty Hillman hex head cap screws engineered from heat treated steel for high strength fastening. The 7 16 in. diameter by 3 1 2 in. length bolts feature a washer face under the head and coarse threads, ideal for securing machinery, automotive, and structural assemblies. Key Features: Grade 8 Strength: Heat treated steel provides superior tensile strength for demanding
Hillman Grade 8 Hex Head Cap Screws, 7/16 in. x 3-1/2 in., 25-Pack
Heavy-duty Hillman hex head cap screws engineered from heat-treated steel for high-strength fastening. The 7/16 in. diameter by 3-1/2 in. length bolts feature a washer face under the head and coarse threads, ideal for securing machinery, automotive, and structural assemblies.
Key Features:
- Grade 8 Strength: Heat-treated steel provides superior tensile strength for demanding applications
- Washer Face Head: Integrated bearing surface improves load distribution and sealing
- Coarse Thread Design: Reliable grip and easier starts in tapped holes or with a nut
- Partially Threaded Shank: Adds shear strength where clamping force is needed
- Convenient Value Pack: 25 screws per box for project efficiency
Specifications Table:
| Specification | Details |
|---|---|
| Diameter | 7/16 inch |
| Length | 3-1/2 inch |
| Material | Steel |
| Finish | Heat-treated yellow dichromate |
| Grade | Grade 8 |
| Thread Type | Coarse (USS) |
| Head Type | Hex head with washer face |
| Shank | Partially threaded |
| Number in Package | 25 pack |
| Packaging Type | Boxed |
| Intended Use | Use with a nut or in a tapped hole; tighten with a wrench or drill |
Frequently Asked Questions (FAQ):
Q: Are these fully threaded?
A: No. They are partially threaded along the shank for added shear strength.
Q: What thread type do these bolts use?
A: They use coarse threads (USS).
Q: Can I use these outdoors?
A: They are heat-treated steel with a yellow dichromate finish for wear resistance; for long-term outdoor corrosion resistance, consider additional protection or stainless/galvanized alternatives depending on exposure.
Q: What tools are needed for installation?
A: Tighten with a wrench or compatible socket; a drill with a socket adapter can also be used.
Q: What size are these bolts?
A: Each bolt is 7/16 in. diameter and 3-1/2 in. length.
Industrial Poise, Engineered to Endure
These hex cap screws bring a disciplined, architectural clarity to utility—sleek, purposeful, and unapologetically strong. The washer-faced head feels refined, giving a tailored finish to exposed joinery. Use them to punctuate a workshop bench or custom metal frame where the hardware becomes part of the story. Their confident presence and grade-8 grit make reliability feel luxurious.
Choose Hillman Grade 8 hex cap screws for dependable, high-strength fastening that finishes your project right the first time.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy