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Description
Hillman 1/4 in. Diameter x 1-1/2 in. Length Zinc-Plated Steel Hex Bolt, 100-PackHillman 1 4 in. x 1 1 2 in. Zinc Plated Hex Bolt (100 Pack) Durable zinc plated Grade 2 steel hex bolts for wood to wood, wood to metal, and metal to metal fastening. Partially threaded shank delivers strong clamping with reduced shear movement, ideal for general purpose projects and repairs. Key Features: General Purpose Strength: Grade 2 steel suitable for most everyday fastening applications Corrosion Resistance: Zinc plated finish helps protect
Hillman 1/4 in. x 1-1/2 in. Zinc-Plated Hex Bolt (100-Pack)
Durable zinc-plated Grade 2 steel hex bolts for wood-to-wood, wood-to-metal, and metal-to-metal fastening. Partially threaded shank delivers strong clamping with reduced shear movement, ideal for general-purpose projects and repairs.
Key Features:
- General-Purpose Strength: Grade 2 steel suitable for most everyday fastening applications
- Corrosion Resistance: Zinc-plated finish helps protect against rust in typical environments
- Secure Grip: Partially threaded shank increases clamping force and minimizes shear
- Versatile Use: Works in wood, metal, and mixed-material assemblies
- Bulk Pack Convenience: 100-piece boxed pack for jobsites and shop inventory
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Hillman |
| Diameter | 1/4 inch |
| Length | 1-1/2 inch |
| Material | Steel |
| Finish | Zinc Plated |
| Grade | Grade 2 |
| Thread Type | Coarse |
| Head Style | Hex |
| Thread Coverage | Partial thread |
| Number in Package | 100 pack |
| Packaging Type | Boxed |
| Intended Applications | Wood-to-wood, wood-to-metal, and metal-to-metal fastening |
| Unit of Measurement (site) | Listed as Metric on source page, dimensions in inches |
Frequently Asked Questions (FAQ):
Q: What size are these bolts?
A: They are 1/4 in. diameter by 1-1/2 in. length.
Q: What thread type do they use?
A: Coarse thread.
Q: Are these fully threaded?
A: No, they are partially threaded to improve clamping strength.
Q: What grade are they?
A: Grade 2, appropriate for most general-use fastening.
Q: Will they resist rust outdoors?
A: The zinc-plated finish offers basic corrosion resistance for typical use; for harsh outdoor or marine environments, consider a higher corrosion-resistant option.
A Clean, Industrial Accent in Every Fastener
There’s a quiet elegance in hardware that performs beautifully. The crisp hex head and cool zinc sheen lend a purposeful, industrial note that complements raw woods and brushed metals. Use them to align exposed joints on shelving or benches for a tailored, workshop-chic look. Reliable and refined, they’re the subtle detail that elevates everyday builds to luxe utility.
Stock up on this 100-pack of zinc-plated hex bolts and tackle your next project with strong, reliable fastening.
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
4.3 ★★★★★
Based on 1647 reviews
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Product Reviews
★★★★★ 5
Great product!
Style: 30 sqft
I can say this product makes a huge difference with road noise and is cleaner and easy to work with when applying compared to other mats that cost about the same price.
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Reviewed in the United States on February 14, 2026
★★★★★ 5
Very heavy and thick
Style: 30 sqft
I purchased mini brands of sound ending and this is by far the heaviest sound deadening I've ever ordered. I'm not installed yet but I have a good feeling that is going to work exceptionally in blocking sound. If weight is a concern for you I would recommend a lighter product however if sound quality and a quiet ride is your priority this is the one for you.
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Reviewed in the United States on March 18, 2026
★★★★★ 5
Siless Hybrid 3-in-1 - Far Exceeded my Expectations!!!
Model: SLH20025
I recently installed the Siless Hybrid 3-in-1 sound deadening mat in my vehicle, and I’m genuinely impressed. For just $80 for 25 square feet, this product delivers performance that rivals materials costing twice as much — and with far less hassle. If you're on the fence......Just buy it! You will not be disappointed.
Easy to Install: Unlike traditional sound deadening products that are stiff, sharp, and temperature-sensitive, this mat is soft, flexible, and easy to work with. I cut it cleanly with regular scissors and pressed it into tight spaces using just my fingers, so if in you don't have a roller or install tool, a good pair of scissors and your hands can get the job done. With other brands like Dynamat, the aluminum layer often leaves micro cuts on your hands and tears up your fingertips, but Siless does not due the acoustic layer being on top and above the aluminum layer that holds the butyl layer. So, it's very easy on your hands.
Even in cooler temperatures (around 50°F), I had no trouble applying it but it goes on better heated. If warm outside, I would leave the entire box out in the sun for at least 30 minutes when it's warm or heats it's very pliable and easy to mold. Make sure its where you want it because once applied it's not ever falling off. and it became even more pliable and easy to mold. No heat gun, no mess — just straightforward application.
I installed 40–50 square feet throughout the interior, covering everything except the headliner and the flooring forward of the rear seat. The difference in cabin noise is astonishing. I can turn my radio up concert loud with gut-punching bass, and from outside the car, it sounds like a factory sound system at mid volume. I was blown away by how well it contains sound — both inside out and outside in.
My exhaust is pretty aggressive and now is barely audible from inside the cabin. While driving, it almost sounds like a stock factory setup. The Siless matting actually changed the driving experience and feels refined.
If you're skeptical about sound deadening gimmicks, I get it, but this is the first product I've used and when I needed more, I went Stright to the 3 in 1 Hybrid matting and purchased it again. I love researching before buying and that's very uncommon for me to do.
Note: Proper installation is key, and it does take time and patience. But if installed correctly and in the right places, it works better previously used from paint-on sound deadening to Dynamat.
Update Nov, 2025
After using it this in 4 separate vehicles now. I feel the Siless’s 3 in 1 Hybrid has nailed it for best budget deadener that is better than dynamat extreme in performance and installation
Protip: buy a roll of 2-3” aluminum tape and tape the seams. After trimming the edges tend to very sticky between the panels. I ran a strip of aluminum tape over the seems to create a better seal and true moisture
I used it on four vehicles now and have I have not been paid to review and purchased every order myself.
3 in 1 Hybrid deadener by Siless is the best all around easy to apply sound deadner period!
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Reviewed in the United States on September 29, 2025
★★★★★ 5
Top quality
Model: SLH20025
This Siless Hybrid 3-in-1 sound deadening mat is easy to work with and feels high-quality. The butyl material is thick and pliable, making it simple to cut and fit into doors, floors, or panels.
After installation, road noise and vibrations are noticeably reduced, and it also seems to improve the overall cabin feel. No bad smell.
At 25 sq ft per roll, it’s a good value for anyone looking to dampen noise and improve car acoustics. Overall, a solid, effective option for automotive soundproofing. Used on a Fiesta ST.
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Reviewed in the United States on February 15, 2026
★★★★★ 5
Made a big improvement in cabin noise—highly recommend
Model: SLH20025
Siless Hybrid made a huge difference in reducing noise in the floor of my truck cabin. In some areas, there was basically just bare sheet metal between the inside and outside, so adding this really helped the truck feel more solid and noticeably quieter on the road.
I used Kilmat on the doors, and honestly I wish I had used Siless Hybrid there too, but it was too late by the time I realized the difference. This material is very sticky, easy to cut, and simple to apply, which made the install pretty smooth.
Just a heads-up: the tacky side gets messy and will bond to clothing really easily, so be careful during installation. Overall, I’d definitely buy it again—great product with real results.
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Reviewed in the United States on December 2, 2025
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