Hillman 5/16 in. x 1-1/4 in. Zinc-Plated Steel Carriage Bolt, 100-Pack
Regular price $15.645/16" x 1-1/4" Zinc-Plated Carriage Bolts (100-Pack)
Durable Hillman carriage bolts made of zinc-plated steel for reliable fastening in wood-to-wood or wood-to-metal applications. The square neck locks into wood to prevent spinning, while the rounded head offers a clean, semi-flush finish.
Key Features:
- Reliable Wood Fastening: Square neck locks into wood to prevent bolt spin during tightening
- Clean Finish: Rounded head provides a semi-flush, washer-less appearance
- Corrosion Protection: Zinc-plated steel offers moderate rust resistance for indoor/outdoor projects
- Standard Thread: 5/16"-18 fully threaded shank for common hardware compatibility
- Bulk Value: Convenient 100-pack for jobsites and repeat projects
Specifications Table:
| Specification | Details |
|---|---|
| Size | 5/16 x 1-1/4-Inch |
| Thread Size | 5/16"-18 |
| Thread Type | UN |
| Thread Class | 2A |
| Thread Style | Fully Threaded |
| Fastener Type | Carriage Bolt |
| Material | Steel (Alloy Steel listed by manufacturer) |
| Exterior Finish | Zinc-Plated |
| Finish | Glossy |
| Head Style | Rounded/Dome with square neck; flat head appearance noted by manufacturer |
| Head Type | Flat (manufacturer listing); rounded dome head common to carriage bolts |
| Item Diameter | 0.31 inches (5/16") |
| Item Hardness / Grade | Grade 2 |
| Number of Pieces | 100 |
| Color | Silver / No Color |
| Shape | Cylindrical |
| Usage | Wood |
| Measurement System | Inch |
| Included Components | Carriage bolts only |
| Item Weight | 3.4 lb |
| Part Number | 240081 |
| Item Model Number | 240081 |
| UPC | 008236086676 |
| Global Trade Identification Number | 00008236086676 |
| Manufacturer | The Hillman Group |
Frequently Asked Questions (FAQ):
Q: Are nuts included with these carriage bolts?
A: No; this listing is for bolts only. Pair with compatible 5/16"-18 nuts and washers as needed.
Q: Can these be used outdoors?
A: The zinc plating provides moderate corrosion resistance; for harsh coastal or long-term exterior exposure, consider hot-dip galvanized or stainless options.
Q: What materials can I fasten with these?
A: Designed primarily for wood; commonly used for wood-to-wood or wood-to-metal connections when the square neck can seat into the wood.
Q: Do I need a special tool to hold the head?
A: No; the square underside locks into the wood to prevent turning, allowing tightening from the nut side.
Q: What is the thread specification?
A: 5/16"-18 UNC, fully threaded, Class 2A.
A Sleek, Functional Fastener for Clean Wood Joinery
These zinc-plated carriage bolts bring a polished, minimal look to wood assemblies, letting the rounded heads sit with a subtle, refined presence. The square neck detail is the hero—anchoring into the timber to keep lines crisp and hardware unobtrusive. Use them on bench frames or garden structures where you want strength without visual clutter. A smart staple for elevated, durable craftsmanship.
AI Review Summary:
Across verified reviews, customers praise consistent sizing, clean zinc finish, and strong performance in wood projects. Many note the square neck seats well and prevents spinning, making installation straightforward. Satisfaction with bulk value is common. Minor caveats include that zinc plating is best for indoor or mild outdoor use, and nuts/washers are not included. Representative quotes: “Perfect fit—threads were clean and consistent.” “Great value for large woodworking projects.” “Worked flawlessly; the square neck bit into the lumber and stayed put.”
Secure your projects with these dependable, zinc-plated carriage bolts—add the 100-pack to your cart and build with confidence.
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