Minerallac Grade 5 Hex Head Ca...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$162.86
Minerallac Grade 5 Hex Head Cap Screw 3/8-16 x 1-1/2" Zinc Plated Medium Carbon Steel, 100 Pack

Minerallac Grade 5 Hex Head Cap Screw 3/8-16 x 1-1/2" Zinc Plated Medium Carbon Steel, 100 Pack

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Model: 55425J

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

$162.86
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Minerallac Grade 5 Hex Head Cap Screw 3/8-16 x 1-1/2" Zinc Plated Medium Carbon Steel

Professional Grade Fastening Solution with Superior Strength & Corrosion Resistance

Minerallac Grade 5 Hex Head Cap Screws deliver exceptional strength and reliability for demanding fastening applications. Manufactured from medium carbon steel and quenched and tempered for enhanced durability, these partial threaded hex head cap screws feature zinc plated finish for corrosion resistance. The 3/8-16 x 1-1/2" configuration with coarse threading provides secure fastening performance across professional installations.

Professional Features & Benefits

  • Grade 5 Steel Construction: Medium carbon steel material quenched and tempered delivers superior tensile strength and reliability for critical fastening applications.
  • Zinc Plated Finish: Protective zinc coating provides excellent corrosion resistance and extends service life in various environmental conditions.
  • Hex Head Design: Standard hex head configuration enables secure grip and efficient installation with common tools and equipment.
  • Partial Threading: Optimized thread design provides strong engagement while allowing proper seating and load distribution.
  • Coarse Thread Pattern: 16 TPI coarse threading ensures reliable fastening in standard applications with enhanced holding power.
  • Precision Dimensions: 3/8-16 x 1-1/2" sizing meets industry standards for consistent performance and compatibility.

Technical Specifications

  • Country Of Origin: China
  • Head Color: Silver
  • Head Height: 15/64
  • Head Type: Hex Head
  • Head Width: 16-Sep
  • Product Finish: Zinc Plated
  • Product Length: 1-1/2 in
  • Product Material: Grade 5 Steel
  • Product Size: 3/8-16 x 1-1/2
  • Product Type: Hex Cap Bolt
  • Thread Size: 16
  • Thread Type: Coarse

Professional Applications

  • Structural Steel Construction and Assembly
  • Mechanical Equipment Installation
  • Industrial Machinery Fastening
  • Commercial Building Systems
  • Heavy-Duty Mounting Applications
  • Professional Maintenance and Repair

Why Choose Minerallac Quality?

Minerallac hex head cap screws combine proven Grade 5 steel construction with protective zinc plating to deliver reliable fastening performance. The medium carbon steel material with quench and temper treatment ensures consistent strength characteristics, while the precision manufacturing maintains dimensional accuracy for professional applications requiring dependable fastening solutions.

Manufacturer Resources

Product Specs

Head Color:
Silver
Head Height:
15/64
Head Type:
Hex Head
Head Width:
16-Sep
Product Finish:
Zinc Plated
Product Length:
1-1/2 in
Product Material:
Grade 5 Steel
Product Size:
3/8-16 x 1-1/2
Product Type:
Hex Bolt
Thread Size:
16
Thread Type:
Coarse
Department:
Electrical
Product Subgroup:
Hex Bolts & Nuts
Product Group:
Hangers, Supports & Fasteners

Minerallac 55425J – Frequently Asked Questions

1) Will this hex cap screw thread into a 3/8-16 tapped hole or a standard 3/8 coarse nut?
Yes. The Minerallac 55425J is 3/8-16 UNC, 16 threads per inch coarse, so it mates with any 3/8-16 tapped hole, coarse hex nut, or coarse-thread anchor insert. It will not fit a 3/8-24 fine-thread nut.
2) What wrench or socket size do I need for a 3/8-16 hex cap screw?
A 3/8-16 hex head cap screw takes a 9/16 inch wrench or socket, which is the standard across-flats size for that diameter. The head on the Minerallac 55425J stands 15/64 inch tall, so a standard depth socket clears it without trouble.
3) Is Grade 5 strong enough for structural steel and equipment mounting, or do I need Grade 8?
Grade 5 is the general-purpose medium carbon steel fastener, quenched and tempered, and it covers most mechanical equipment mounting, machinery fastening, and heavy-duty mounting work. Step up to Grade 8 only where an engineer has called out the higher tensile class on the drawing, or where the joint sees repeated high preload. For everyday steel-to-steel bolting in commercial building systems, Grade 5 is the normal call.
4) Can I use zinc plated cap screws outdoors or in a damp mechanical room?
The zinc plating on these Minerallac cap screws handles general corrosion exposure, damp mechanical rooms, and covered exterior work. For direct weather, coastal salt air, or anything submerged or chemically exposed, go to hot dip galvanized or stainless instead. Also avoid pairing zinc plated carbon steel bolts with bare aluminum or stainless in a wet joint, since dissimilar metals in contact will accelerate corrosion.
5) Do these cap screws come with nuts and washers?
No. The 55425J is the hex cap screw only. If you are bolting through rather than into a tapped hole, order 3/8-16 coarse hex nuts and 3/8 flat and lock washers separately, and match them in zinc plate so the assembly weathers evenly.
6) What is the exact part number and size to reorder these Minerallac hex bolts?
Order Minerallac 55425J, a 3/8-16 x 1-1/2 inch Grade 5 hex head cap screw in zinc plate. Keeping the full part number on the requisition matters because the same 55425 family runs across several lengths, and only the suffix separates the pack configuration.
7) Where are Minerallac hex cap screws made? I have domestic sourcing requirements.
These Minerallac Grade 5 hex cap screws are made in China. If your project carries a Buy American or domestic-content clause on fasteners, this part will not satisfy it and you will need a domestically manufactured Grade 5 equivalent.
How fast can I get the Minerallac 55425J 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 55425J come with a warranty?
Absolutely. The Minerallac 55425J 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 55425J?
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 55425J 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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