Minerallac 55050J Fully Thread...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$50.54
$27.14
Minerallac 55050J Fully Threaded Hex Head Tap Bolt, Zinc-Plated Steel

Minerallac 55050J Fully Threaded Hex Head Tap Bolt, Zinc-Plated Steel

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Model: 55050J

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

$50.54
$27.14
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Minerallac 55050J Fully Threaded Hex Head Tap Bolt, Zinc-Plated Steel

The Minerallac 55050J is a 3/8-16 x 3" hex head tap bolt engineered for demanding electrical and mechanical assembly work where a dependable, fully threaded fastener is required. Manufactured from steel and finished with a zinc plating for corrosion resistance, this bolt is packaged 100 to a jar for convenient storage and use on the job site or in the shop. Meeting the A307 standard and rated Grade 2, the 55050J delivers consistent strength and thread engagement for general-purpose fastening applications across conduit, enclosure, and equipment mounting tasks. With 20 threads per inch, the fully threaded shank offers flexible clamping depth for use across a range of material thicknesses, making it a versatile stocking item for electrical contractors and industrial maintenance crews alike. Its compact 3" overall length and standard 3/8-16 thread pitch make it easy to pair with common nuts, washers, and mounting hardware already found on most job trucks, reducing the need to special-order fasteners for routine work.

Key Features

  • Fastener Size: 3/8-16 thread with a 3" overall length, providing full engagement for a wide range of mounting applications.
  • Fully Threaded Design: Continuous threading along the entire shank length, at 20 threads per inch, allows for flexible clamping depth and secure hold in varying material thicknesses.
  • Durable Steel Construction: Manufactured from steel for reliable mechanical strength in demanding installation environments.
  • Zinc-Plated Finish: Zinc plating provides added corrosion resistance, extending service life in electrical and industrial settings.
  • Grade 2 Rating: Meets Grade 2 strength requirements, suitable for general-purpose structural and equipment fastening.
  • A307 Standard Compliance: Manufactured to conform to the A307 fastener standard for consistent quality and performance.
  • Convenient Jar Packaging: Supplied 100 pieces per jar, making it easy to store, transport, and dispense bolts as needed for multiple jobs.

Technical Specifications

  • Product Type: Hex Head Bolts
  • Product Material: Steel
  • Product Length: 3.000 in
  • Threads Per Inch: 20
  • Grade: Grade 2
  • Standard: A307
  • Country Of Origin: Taiwan

Typical Applications

  • Electrical Enclosure and Panel Assembly
  • Conduit Support and Bracket Mounting
  • Equipment and Machinery Fastening
  • General Industrial and Commercial Assembly
  • Maintenance and Repair Projects

Why Minerallac?

Minerallac fasteners are manufactured from steel to A307 standards and finished with corrosion-resistant zinc plating, giving electrical contractors and maintenance professionals a dependable Grade 2 hex head tap bolt for everyday assembly needs. The fully threaded 3/8-16 x 3" design and convenient 100-count jar packaging make the 55050J a practical choice for stocking trucks and job boxes alike, supporting consistent, code-compliant fastening performance across a range of electrical and industrial applications. Whether mounting conduit supports, securing enclosures, or fastening equipment brackets, this steel tap bolt provides the strength, thread engagement, and corrosion resistance electrical professionals rely on for reliable, long-lasting installations, and its Taiwan-manufactured, A307-compliant build ensures consistent quality lot after lot.

Manufacturer Resources

Product Specs

Grade:
Grade 2
Head Type:
Hex Head
Product Diameter:
4-Jan
Product Finish:
Zinc Plated
Product Length:
3.000 in
Product Material:
Steel
Product Size:
1/4"-20 x 3
Product Type:
Hex Bolt
Standards:
A307
Threads Per Inch:
20
Department:
Electrical
Product Subgroup:
Hex Bolts & Nuts
Product Group:
Hangers, Supports & Fasteners

Minerallac 55050J – Frequently Asked Questions

1) Is the Minerallac 55050J tap bolt threaded all the way to the head?
Yes, the 55050J is fully threaded along its entire 3 inch length at 20 threads per inch. That matters on bracket and strut work where grip length varies: you can set the nut anywhere on the shank instead of matching an unthreaded shoulder to your material stack. It also means you can run it into a tapped hole to whatever depth the hole allows.
2) What strength grade is the Minerallac 55050J hex bolt, and is it strong enough for equipment mounting?
It is a Grade 2 bolt manufactured to the A307 fastener standard, which is the general-purpose carbon steel class used for non-structural mounting: conduit supports, enclosure and panel assembly, equipment brackets, and MRO repair work. If a drawing calls out a higher class such as Grade 5 or Grade 8 for a load-bearing connection, a Grade 2 A307 bolt does not substitute for it.
3) Can a zinc-plated steel hex tap bolt like the Minerallac 55050J be used outdoors or in a damp area?
The 55050J is steel with a zinc-plated finish, which handles indoor, covered, and intermittently damp industrial conditions. Zinc plating is a sacrificial coating, not stainless: in continuous wet exposure, coastal air, or chemically aggressive environments it will eventually corrode, so specify stainless or hot-dip galvanized hardware for those openings instead.
4) Does the Minerallac 55050J come with nuts and washers?
No. The 55050J is sold as bolts only, 100 to a jar. You will need to supply matching hex nuts and flat or lock washers separately, in the same coarse thread and in a finish that matches the zinc plating so you do not create a dissimilar-metal pairing at the joint.
5) What is the difference between a hex tap bolt and a regular hex cap screw?
A tap bolt is threaded the full length of the shank; a standard hex cap screw has a plain unthreaded shoulder under the head. The Minerallac 55050J is the fully threaded type, which is what you want when driving into a tapped hole, a strut nut, or a threaded insert where you need engagement right up to the bearing surface. Choose the partially threaded version instead when you want the smooth shank carrying shear in a clearance hole.
6) How many bolts come in a jar of Minerallac 55050J?
They ship 100 pieces to a jar. That is a stocking quantity rather than a loose count, which is why electrical contractors keep it on the truck or in the job box for routine conduit and enclosure fastening instead of ordering per-job.
7) What head does the Minerallac 55050J take, and can I run it with a socket?
It has a standard hex head, so it drives with a socket, a nut driver, or an open or box wrench. No specialty bit is needed, which is part of why it works as a general stocking fastener for electrical and maintenance crews.
How fast can I get the Minerallac 55050J 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 55050J come with a warranty?
Absolutely. The Minerallac 55050J 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 55050J?
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 55050J from ZenSupply?
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