Minerallac Grade 2 Steel Hex Head Bolt 5/16-18 x 1" Zinc Plated Fully Threaded
Professional Grade Fastening Solution with Corrosion Protection
The Minerallac Grade 2 Steel Hex Head Bolt delivers reliable fastening performance with 5/16-18 threading and 1-inch length. Constructed from medium carbon steel that is quenched and tempered for enhanced strength, this fully threaded bolt features zinc plating for corrosion resistance and professional durability in demanding applications.
Professional Features & Benefits
- Grade 2 Steel Construction: Medium carbon steel material provides superior strength and reliability for critical fastening applications
- Zinc Plated Finish: Corrosion-resistant coating extends service life and maintains appearance in various environmental conditions
- 5/16-18 Threading: Standard coarse thread pattern ensures secure engagement and optimal holding power
- Hex Head Design: Professional hex head configuration allows for efficient installation with standard tools
- Fully Threaded: Complete threading maximizes engagement length and provides versatile installation options
- 1-Inch Length: Optimal size for a wide range of structural and mechanical fastening requirements
Technical Specifications
- Country Of Origin: Taiwan
- Head Color: Silver
- Head Height: 13/64
- Head Type: Hex Head
- Head Width: 2-Jan
- Product Finish: Zinc Plated
- Product Length: 1 in
- Product Material: Grade 2 Steel
- Product Size: 5/16-18 x 1
- Product Type: Hex Cap Bolt
- Thread Size: 18
- Thread Type: Coarse
Professional Applications
- Structural Steel Construction and Assembly
- Mechanical Equipment Installation
- Industrial Machinery Fastening
- Commercial Building Systems
- Electrical Panel and Enclosure Mounting
- HVAC Equipment Securing
- General Construction and Maintenance
Why Choose Minerallac Quality?
Minerallac delivers professional-grade fastening solutions with consistent quality and reliability. The Grade 2 steel construction with zinc plated finish ensures long-term performance and corrosion resistance, making this hex head bolt an ideal choice for demanding professional applications where secure fastening is critical.
Manufacturer Resources
Product Specs
- Head Color:
- Silver
- Head Height:
- 13/64
- Head Type:
- Hex Head
- Head Width:
- 2-Jan
- Product Finish:
- Zinc Plated
- Product Length:
- 1 in
- Product Material:
- Grade 2 Steel
- Product Size:
- 5/16-18 x 1
- Product Type:
- Hex Bolt
- Thread Size:
- 18
- Thread Type:
- Coarse
- Department:
- Electrical
- Product Subgroup:
- Hex Bolts & Nuts
- Product Group:
- Hangers, Supports & Fasteners
Minerallac 55216J – Frequently Asked Questions
1) What thread does the Minerallac 55216J hex bolt take, and what nut do I need with it?
The 55216J is a 5/16-18 bolt, meaning a 5/16 inch diameter with 18 threads per inch, which is the standard UNC coarse thread for that diameter. Any 5/16-18 coarse hex nut or 5/16 inch coarse tapped channel, strut, or enclosure boss will take it. A 5/16-24 fine nut will not thread on.
2) Is a zinc plated Grade 2 bolt OK outdoors or in a damp mechanical room?
The zinc plating on the 55216J gives it corrosion resistance suited to general indoor and sheltered use, electrical enclosures, HVAC equipment, and mechanical rooms. Zinc plating is a thin sacrificial coating, not hot dip galvanizing or stainless, so for direct weather exposure, roof-mounted equipment, or wet or corrosive environments specify a galvanized or stainless fastener instead.
3) What size wrench or socket turns a 5/16-18 hex cap bolt?
A 1/2 inch wrench or socket is the standard across-flats size for a 5/16 inch hex head bolt. The 55216J uses a plain hex head, so a standard combination wrench, socket, or nut driver does the job, no bits or special tooling.
4) How low a profile does the head sit, and will it clear a flush cover?
Head height on the 55216J is 13/64 inch, so the head stands roughly a fifth of an inch above the surface. That clears most enclosure covers and equipment panels, but if you need a truly flush face, a flat head or socket countersunk screw is the right call instead of a hex cap bolt.
5) How are these Minerallac 5/16-18 bolts packaged for shop stock?
Model 55216J ships 100 bolts to a jar, which is the typical shop or service-truck stock pack for a common 5/16-18 fastener. Ordering by the jar keeps one size staged for repeat enclosure and equipment mounting work rather than counting out loose pieces per job.
6) Where are Minerallac 55216J hex bolts made?
Country of origin is Taiwan. That matters on public and institutional work where a Buy American or domestic-sourcing clause applies to permanently installed material, so check the spec section before submitting these on a government or federally funded project.
How fast can I get the Minerallac 55216J 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 55216J come with a warranty?
Absolutely. The Minerallac 55216J 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 55216J?
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 55216J from ZenSupply?
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