Hillman 3/4 in. Diameter x 3-1/2 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, Coarse Thread, 20-Pack
SKU: 68757881577

Hillman 3/4 in. Diameter x 3-1/2 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, Coarse Thread, 20-Pack

Sale price$92.69 Regular price$102.99
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Description

Hillman 3/4 in. Diameter x 3-1/2 in. Length Grade 8 Heat-Treated Steel Hex Head Cap Screws, Coarse Thread, 20-PackHillman Grade 8 Hex Head Cap Screws, 3 4 in. x 3 1 2 in., 20 Pack Heavy duty Hillman hex head cap screws deliver Grade 8 strength for demanding assemblies. Made from heat treated steel with a washer face and coarse threads, theyre ideal for securing machinery, automotive, and structural components. Key Features: Grade 8 Strength: Heat treated steel provides superior tensile strength for high stress applications Coarse Thread: Ensures strong hold in

Hillman Grade 8 Hex Head Cap Screws, 3/4 in. x 3-1/2 in., 20-Pack

Heavy-duty Hillman hex head cap screws deliver Grade 8 strength for demanding assemblies. Made from heat-treated steel with a washer face and coarse threads, they’re ideal for securing machinery, automotive, and structural components.


Key Features:

  • Grade 8 Strength: Heat-treated steel provides superior tensile strength for high-stress applications
  • Coarse Thread: Ensures strong hold in tapped holes and with nuts; ideal for quick assembly
  • Washer Face Head: Built-in bearing surface under the hex head improves seating and load distribution
  • Partially Threaded Shank: Enhances shear strength where unthreaded grip is needed
  • Bulk Convenience: 20-pack boxed for shop and jobsite efficiency

Specifications Table:

Specification Details
Brand Hillman
Size 3/4 in. diameter x 3-1/2 in. length
Material Steel
Grade Grade 8
Finish Heat-treated yellow dichromate (heat treated)
Thread Type Coarse (USS)
Thread Coverage Partially threaded along shank
Head Type Hex head with washer face
Number in Package 20
Packaging Boxed
Category Hex Bolts / Hex Cap Screws
Package Dimensions (L x W x H) 6.8 in x 4.5 in x 3.3 in
Package Weight 10.9 lb

Frequently Asked Questions (FAQ):

Q: What size are these bolts?
A: Each bolt is 3/4 in. diameter by 3-1/2 in. length.


Q: What grade are they?
A: Grade 8 heat-treated steel for high strength.


Q: What thread type do they have?
A: Coarse thread (USS).


Q: Are they fully threaded?
A: No, they are partially threaded along the shank.


Q: How many come in a box?
A: 20 bolts per pack.


Industrial Strength, Polished Precision

There’s a quiet elegance in hardware that performs beautifully. These Grade 8 hex cap screws bring a muscular, architectural presence—clean hex geometry with a confident, coarse thread. Style them as exposed fasteners on reclaimed timbers or steel frames for a refined industrial moment. Consider them the jewelry of hardworking spaces—small details that make luxury feel effortless.


Secure your next project with Grade 8 confidence—add this 20-pack of Hillman hex cap screws to your cart now.

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: 68757881577

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4.5 ★★★★★
Based on 120 reviews
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Product Reviews
C
Verified Purchase
Coulton
Belleville, US
★★★★★ 5
Great deal!
Size: 8 AWG 3 ft per color, Color: Red and Black
Used it to wire up my boat for trolling motor. Heat shrinked everything and went super smooth. Great deal!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 6, 2019
C
Verified Purchase
Chuck
Draper, US
★★★★★ 5
Nice quality wire
Size: 8 AWG 3 ft per color, Color: Red and Black
Very flexible with a nice jacket - appears correctly advertised gauge and pure copper.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2020
M
M.R.
Omaha, US
★★★★★ 5
The Thick Red and Black Spaghetti of Power
Size: 20FT Black & 20FT Red
If electricity had highways, this would be an interstate. The cable feels substantial, the copper conductors are flexible enough to work with, and the included lugs and heat shrink tubing make installation easier. Great for batteries, inverters, solar systems, RV electrical upgrades, marine projects, and welding setups. Voltage drop stays low thanks to the heavy gauge construction, and the insulation feels durable enough for demanding environments. Overall, a solid wiring kit that inspires confidence when moving serious current.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
D
Drew
Massapequa, US
★★★★★ 5
Great cable kit.
Size: 20FT Black & 20FT Red, Size: 20FT Black & 20FT Red
Great heavy duty cable. Good thick feeling insulation that looks the real deal. Wire is soft enough to route easily without too much resistance. Appreciate it coming with the lugs and heat shrink instead of you having to source extras. Seems to be truly copper as listed. Great deal for the length if so. Worked for what I needed on my UTV.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
R
Rachel H.
Pawtucket, US
★★★★★ 5
Cheap price for the cable and terminal ends with heat shrink.
Size: 20FT Black & 20FT Red
Good 6 gauge wire, jacket seems sturdy and like it won't crack easily over time like some wire. Comes with all the connectors shown too so you don't need to find end ring connections to terminate the ends. Just need a punch or crimp tool for the terminals but if you already have that then just cut your wire length and add the ends for battery cable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026

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