SKU: 14784948981

Hillman 5/16 in. Diameter x 1-1/4 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 100-Pack

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Description

Hillman 5/16 in. Diameter x 1-1/4 in. Length Heat-Treated Zinc Steel Hex Head Cap Screw, 100-PackHillman Grade 5 Zinc Hex Head Cap Screws, 5 16 in. x 1 1 4 in., 100 Pack These Hillman hex head cap screws are Grade 5 steel with a heat treated zinc finish for strength and wear resistance. Sized 5 16 in. diameter by 1 1 4 in. length, they feature coarse threads and a washer face under the head for secure fastening in wood or metal applications. Key Features: Grade 5 Strength: Heat treated steel provides higher tensile strength for demanding projects

Hillman Grade 5 Zinc Hex Head Cap Screws, 5/16 in. x 1-1/4 in., 100-Pack

These Hillman hex head cap screws are Grade 5 steel with a heat-treated zinc finish for strength and wear resistance. Sized 5/16 in. diameter by 1-1/4 in. length, they feature coarse threads and a washer face under the head for secure fastening in wood or metal applications.


Key Features:

  • Grade 5 Strength: Heat-treated steel provides higher tensile strength for demanding projects
  • Corrosion-Resistant Finish: Zinc plating helps protect against rust and wear
  • Washer Face Head: Built-in bearing surface under the hex head improves sealing and load distribution
  • Coarse Thread Design: Reliable grip and easier starts in tapped holes or with nuts
  • Contractor Pack: 100-piece boxed pack for efficient stocking and jobsite use

Specifications Table:

Specification Details
Brand Hillman
Diameter 5/16 inch
Length 1-1/4 inch
Material Steel
Finish Heat-treated zinc
Grade Grade 5
Thread Type Coarse (USS)
Head Type Hex head with washer face
Threading Partially threaded shank
Units per Pack 100 (boxed)
Package Height 3.5 in
Package Width 4.3 in
Package Length 4.3 in
Package Weight 3.4 lbs

Frequently Asked Questions (FAQ):

Q: Are these fully threaded?
A: They are partially threaded along the shank, typical of Grade 5 hex cap screws.


Q: What tools are needed for installation?
A: Tighten with a wrench or a drill/driver using the appropriate socket or hex bit.


Q: What is the thread type?
A: Coarse thread (USS).


Q: Can these be used outdoors?
A: The zinc finish offers basic corrosion resistance; for harsh or marine environments, consider stainless or hot-dipped galvanized fasteners.


Q: What size are these screws?
A: 5/16 inch diameter by 1-1/4 inch length.


A Polished Workhorse for Clean, Confident Connections

Crisp zinc sheen meets industrial rigor—these hex cap screws bring a tailored, utilitarian elegance to built-ins and exposed hardware moments. The washer-faced head sits neatly, creating a refined junction that feels intentional, not improvised. Style them with matte-black brackets or raw oak for a modern, mixed-material narrative. An essential, high-strength staple for projects where performance and polish must coexist.


Secure your projects with Grade 5 strength—add this 100-pack of Hillman zinc hex cap screws to your cart today.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 14784948981

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4.5 ★★★★★
Based on 22 reviews
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Verified Purchase
Stuart Nezin
Alexandria, US
★★★★★ 5
Yes, I wish I'd bought this on Black Friday, but still no regrets
Color: Gray
If you use a lot of add-ons like I do you won't regret buying this hub. The number of connection PLUS high power charging ports works for me. Printer, scanner, mouse dongle, phone, tablet, external drive, flash key all connect with zero problems to my Win 11 laptop. Saves my laptop ports from wear and provides a central location for charging my stuff. Solid metal construction, touch switches for each port, even slots forSDd and micro sd cards makes great design and features. Had a decent usb 3 hub but this one SO much better, good value
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Reviewed in the United States on February 26, 2026
M
Verified Purchase
MMM
Lowell, US
★★★★★ 5
well made, nicely built, fast and everything fits firmly
Color: Gray
Sleek and well made, heavier than my old one, as it seems better built in every way. I love the flush power buttons, they don't get accidentally pushed in because of the firmness of the buttons, not hard, just not overly easy like some cheaper hubs. The color is nice looking, the lights are subtle but easily identify each port and the main thing, it's fast. My old USB hub was decidedly slow and often under-powered. It did not always work with some demanding devices. But as soon as I plugged this in, all my devices were recognized and worked correctly. This was a great buy.
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Reviewed in the United States on August 1, 2025
O
Verified Purchase
Olivia
Dallas, US
★★★★★ 4
Had some questions and needed to test it, here's the verdict!
Color: Black
No pictures, but I wished to get this review out as soon as possible because I'm very happy with my purchase. My last USB hub from aother brand broke immediately as soon as I got it which is why I wanted to purchase this as an "upgrade" for the higher voltage and more port options. Firstly I really appreciate that they gave both a USB 3.0 to USB-C and a USB-C to USB-C cable for the power depending on what type of port you have on your computer. The extra cable is always appreciated. I had a bunch of questions stemming from other reviews so I tested them. When you press a button nearby any port, the light goes on. When you hold it, it goes off. When the light is on, it powered my external drive, and when I hold-pressed it off, the drive on my computer disappeared as it should when no power is going to it. I'm glad that works perfectly. Also, it takes 16 seconds to recognize my 8TB drive. It seems a tiny bit long, but not too long, I'm pretty patient. For the SD and Micro SD card slot, there is no on and off power buttons. But they DO work. This was important for me as it was one of the reasons I bought it. The quick charging also works as intended. Also, I wondered what size it was- it's 8.75in long, 2in width, and a measly 0.65in heightwise. Every cord included is slightly larger than 3ft so there should be no problems with connecting it, though maybe it's too many wires for some. One thing I was concerned about was that a reviewer said the ports were very tight, and they are. I thought I was gonna break the ports by connecting a USB, but thankfully it didn't break. I don't know how realiable that is over time, though I imagine because of the buttons, the idea is to connect them once and if you want to not use it, to simply press the button to turn them off. So I think I'll do that once I get all my USBs set into place. If it breaks any port in that process down the line, I'll update my review. And based on the manual, here are the speeds: USB 3.0 & USB C - Max 5GB/sec data speed, Max 5V/1.5A power SD and Micro SD Slots - Read 50-104MB/sec, Write 30-80MB/sec (Subject to memory card speed and computer USB ports) USB QC Ports - No speed or power given Total power supply: Output DC 12V/7.5A (Input AC 100V~240V / 50Hz~60Hz / 2A) The power supply is a big brick LOL. But I appreciate the power, thanks. It's very easy to use overall, I just plug something in, turn the light on, expect it to work and it does. Besides it taking great force to plug a USB in, everything else is exactly what I wanted. Glad I bought this. Edit, a month or two later: The USB ports all still are working, but I noticed some external drives don't have enough power to work, even with the 8V, so I'm docking a point. I should be able to plug at least one in with a few other things connected, but this makes it a little less functional for my usage.
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Reviewed in the United States on June 13, 2025
K
Verified Purchase
Kreg L.
Draper, US
★★★★★ 5
Just what I needed
Color: Black
Never given!give 5 stars. But, this got it because exceeded what I was expecting. Purchased because new computer slots were inconvenient and more new devices are using usb ports and having powered ports was essential. Have used for several months and keep finding more things needing it. It was more than I expected/needed at the time .But, was designed for growth I was not expecting. Getting excellent connections, speed, and reliability even though I’ve nearly doubled the devices I planned on using. To be clear the system I connected to is all about performance and top of the line hardware. I was a performance engineer in a previous position and am very picky with this system setup. I’ve tested the hardware several times tuning things and it’s never the bottleneck. The original purchase was intended as a short term fix when I needed something yesterday and as stated b4 it has earned a place in my permanent setup. Would buy again and would explore other offerings by manufacture.
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Reviewed in the United States on October 23, 2025
R
Verified Purchase
Richard Stewart
Battle Creek, US
★★★★★ 5
USB Hub Extraordinaire
Color: Black
This USB Hub has been better than I expected. Purchased for work, it has streamlined my peripherals, keeping limited desk space from becoming problematic. Absolute must in fast paced work environment. Highly recommended.
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Reviewed in the United States on May 29, 2026

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