Minerallac Grade 5 Hex Head Ca...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$88.57
Minerallac Grade 5 Hex Head Cap Screw 1/4-20 x 1-1/2" Zinc Plated Medium Carbon Steel, 100 Pack

Minerallac Grade 5 Hex Head Cap Screw 1/4-20 x 1-1/2" Zinc Plated Medium Carbon Steel, 100 Pack

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Model: 55025J

In Stock (leaves warehouse same day if ordered before 3pm ET)

$88.57
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Minerallac Grade 5 Hex Head Cap Screw 1/4-20 x 1-1/2" Zinc Plated Medium Carbon Steel

Professional Grade Fastening Solution with Superior Strength

The Minerallac Grade 5 Hex Head Cap Screw delivers reliable fastening performance with 1/4-20 threading and 1-1/2" length. Constructed from medium carbon steel that is quenched and tempered, this hex head cap screw features zinc plated finish for corrosion resistance and professional durability in demanding applications.

Professional Features & Benefits

  • Grade 5 Steel Construction: Medium carbon steel quenched and tempered provides superior tensile strength and reliability for critical fastening applications.
  • 1/4-20 x 1-1/2" Specifications: Precise threading and length dimensions ensure proper fit and optimal holding power in structural and mechanical assemblies.
  • Zinc Plated Finish: Corrosion-resistant coating extends service life and maintains professional appearance in indoor and outdoor environments.
  • Hex Head Design: Standard hex head configuration allows secure installation with common tools and provides reliable torque transfer.
  • Partial Threading: Optimized thread pattern delivers maximum clamping force while reducing installation time and material stress.
  • Three Hash Mark Identification: Clear Grade 5 marking ensures proper specification verification and quality assurance during installation.

Technical Specifications

  • Country Of Origin: China
  • Head Color: Silver
  • Head Height: May-32
  • Head Type: Hex Head
  • Head Width: 16-Jul
  • Product Finish: Zinc Plated
  • Product Length: 1-1/2 in
  • Product Material: Grade 5 Steel
  • Product Size: 1/4"-20 x 1-1/2
  • Product Type: Hex Cap Bolt
  • Thread Size: 20
  • Thread Type: Coarse

Professional Applications

  • Structural Steel Assembly and Construction
  • Mechanical Equipment Installation
  • Industrial Machinery and Equipment
  • Commercial Building Systems
  • Electrical Panel and Enclosure Assembly
  • HVAC System Installation
  • Professional Maintenance and Repair

Why Choose Minerallac Quality?

Minerallac hex head cap screws provide dependable fastening solutions with Grade 5 steel construction and zinc plated finish for long-term performance. The quenched and tempered medium carbon steel construction ensures reliable strength and durability in professional applications.

Manufacturer Resources

Product Specs

Head Color:
Silver
Head Height:
May-32
Head Type:
Hex Head
Head Width:
16-Jul
Product Finish:
Zinc Plated
Product Length:
1-1/2 in
Product Material:
Grade 5 Steel
Product Size:
1/4"-20 x 1-1/2
Product Type:
Hex Bolt
Thread Size:
20
Thread Type:
Coarse
Department:
Electrical
Product Subgroup:
Hex Bolts & Nuts
Product Group:
Hangers, Supports & Fasteners

Minerallac 55025J – Frequently Asked Questions

1) Is the Minerallac 55025J screw fully threaded or partially threaded?
Partially threaded. The 1-1/2 inch length carries thread up part of the shank with a plain grip section below the head, which is what you want when you are clamping two pieces together, the unthreaded body takes the shear and the thread does the pulling. If your application needs thread engagement along the entire length (for example running a nut up the full body or threading into a deep tapped boss), use a fully threaded tap bolt instead.
2) What does Grade 5 mean on this hex cap screw, and is it strong enough for structural steel?
Grade 5 means medium carbon steel that has been quenched and tempered, and the heads carry the three radial hash marks that identify that grade on sight. It is the normal general purpose strength class for machinery and equipment mounting, structural steel assembly, and panel and enclosure work. If a drawing calls out Grade 8 or an ASTM A325 structural bolt specifically, Grade 5 is not a substitute.
3) Is the thread on the 1/4-20 Minerallac cap screw coarse or fine, and what nut do I pair with it?
Coarse thread, 20 threads per inch, which is the UNC pitch for 1/4 inch diameter. Pair it with a 1/4-20 coarse hex nut or thread it into a 1/4-20 tapped hole. A 1/4-28 fine thread nut will not run on it.
4) What size wrench or socket do I need for a 1/4-20 hex cap screw?
A 7/16 inch wrench or socket drives the hex head on a 1/4-20 cap screw. The head is a standard hex pattern, so a ratchet, an impact socket, or an open end wrench all work, and the hex gives you better torque transfer than a slotted or Phillips head when you are pulling a joint tight on steel.
5) Will a zinc plated hex cap screw hold up outdoors or in a damp mechanical room?
The zinc plating gives corrosion resistance for indoor use and general outdoor exposure, which covers rooftop HVAC curbs, equipment pads, and damp mechanical spaces. It is a sacrificial coating, not stainless, so for constant salt spray, coastal exposure, submerged conditions, or chemical washdown you should step up to stainless or hot dip galvanized hardware.
6) How much grip length do I actually get with a 1-1/2 inch cap screw?
Length is measured from under the hex head to the tip, so 1-1/2 inches is the usable depth into the assembly. Subtract the total thickness of the parts you are clamping plus any washers, and leave enough thread for the nut to fully engage. On a strut channel bracket or a sheet metal enclosure flange, 1-1/2 inches is generous and you may want a shorter screw so the tail does not stick out into the cabinet.
7) How is the Minerallac 55025J packaged for a service truck or stockroom?
It comes as a 100 piece jar of 1/4-20 x 1-1/2 inch Grade 5 zinc hex cap screws, which is a practical count for a van bin or an MRO shelf where you want one size on hand rather than a loose bulk box. Nuts and washers are separate items, so order those alongside if the screws are going through unthreaded material.
8) Can I use these hex cap screws for electrical panel and enclosure mounting?
Yes, enclosure and panel assembly is one of the listed uses, along with HVAC equipment installation, machinery mounting, and commercial building systems. The zinc plated Grade 5 body suits dry interior and typical outdoor enclosure locations. One caution: a plated carbon steel cap screw is not a grounding or bonding connector, so use listed grounding hardware where a bonding connection is required.
How fast can I get the Minerallac 55025J delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Minerallac 55025J come with a warranty?
Absolutely. The Minerallac 55025J is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Minerallac 55025J?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Minerallac 55025J from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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