Minerallac BC18ST Hammer-On Be...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$51.83
$2.39
Minerallac BC18ST Hammer-On Beam Clamp, Spring Steel, 1/4"-20 Stud

Minerallac BC18ST Hammer-On Beam Clamp, Spring Steel, 1/4"-20 Stud

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Model: BC18ST

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

$51.83
$2.39
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Minerallac BC18ST Hammer-On Beam Clamp, Spring Steel, 1/4"-20 Stud

The Minerallac BC18ST Hammer-On Beam Clamp is engineered for electricians and contractors who need a fast, tool-friendly way to suspend electrical boxes, conduit, and support hardware directly from structural steel flanges. Constructed from durable spring steel, this beam clamp fits flanges from 1/8" to 1/4" thick and comes equipped with a 1/4"-20 x 3/8" stud for attaching boxes, straps, or other mounting hardware. The clamp features a 1/4"-20 thread impression on both the bottom and back, giving installers flexibility in how the load is oriented and mounted. Rated to support up to 75lbs, the BC18ST is a reliable, code-friendly solution for suspending boxes from I-beams and other structural steel members in commercial and industrial electrical installations. Its two-hole design and black zinc phosphate and oil finish combine practical mounting flexibility with corrosion resistance, making it a dependable choice for both new construction and renovation work where quick, secure overhead support is required. The hammer-on style installation means no bolts or tools are needed to seat the clamp onto the beam flange, saving time on repetitive overhead mounting tasks throughout a jobsite. Measuring approximately 1.46 x 1.75 x 1.42 inches with a body thickness of 0.042", this compact clamp is easy to carry and stage in bulk for repetitive overhead work.

Key Features

  • Stud Size: 1/4"-20 x 3/8" stud included for direct attachment of boxes and mounting hardware.
  • Flange Fit: Fits flanges from 1/8" to 1/4" thick for compatibility with common structural steel beams.
  • Dual Thread Impressions: 1/4"-20 thread impression on both the bottom and back of the clamp for versatile mounting orientation.
  • Durable Construction: Spring steel body provides strong, resilient clamping force for a secure hold on beam flanges.
  • Finish: Zinc phosphate and oil finish helps resist corrosion and supports long-term reliability in demanding job environments.
  • Load Rating: Rated to support up to 75lbs, suitable for boxes and light electrical support hardware.
  • Two-Hole Design: Features 2 holes for additional mounting flexibility beyond the integrated stud.
  • Color: Black finish for a clean, professional appearance on installed hardware.

Technical Specifications

  • Country Of Origin: United States
  • Load: 75lbs
  • Number Of Holes: 2
  • Product Color: Black
  • Product Finish: Zinc Phosphate & Oil
  • Product Size: 1.46 x 1.75 x 1.42
  • Product Type: Beam Clamp with Stud
  • Thickness: 0.042

Typical Applications

  • Suspending Electrical Boxes from Structural Steel Beams
  • Commercial and Industrial Electrical Installations
  • Conduit and Fixture Support from I-Beams
  • Overhead Mounting of Junction Boxes
  • New Construction and Renovation Electrical Work

Why Minerallac?

Minerallac beam clamps like the BC18ST are built from spring steel with a zinc phosphate and oil finish to deliver dependable clamping strength and corrosion resistance on the jobsite. The hammer-on design allows for quick, tool-minimal installation onto beam flanges from 1/8" to 1/4", while the dual 1/4"-20 thread impressions give installers the flexibility to mount hardware in the orientation that best suits the job. For electricians and contractors who need a compact, reliable beam-mount solution rated to 75lbs, the Minerallac BC18ST offers straightforward, code-friendly performance backed by proven spring steel construction and a two-hole design for added mounting versatility on structural steel beam flanges. Whether specified for new commercial builds or retrofit work, this beam clamp is a practical addition to any electrical support inventory.

Manufacturer Resources

Product Specs

Country Of Origin:
United States
Fastening Holes:
1/4"-20
Included:
1/4"-20 x 3/8" Stud
Load:
75lbs
Number Of Holes:
2
Product Color:
Black
Product Finish:
Zinc Phosphate & Oil
Product Material:
Spring Steel
Product Size:
1.46 x 1.75 x 1.42
Product Type:
Beam Clamp
Thickness:
0.042
Department:
Electrical
Product Subgroup:
Clamps
Product Group:
Hangers, Supports & Fasteners

Minerallac BC18ST – Frequently Asked Questions

1) What beam flange thickness will the Minerallac BC18ST hammer-on clamp fit?
The BC18ST grips flanges from 1/8 inch to 1/4 inch thick. That covers most bar joist angles and light structural beam flanges. If the flange on your steel is thicker than 1/4 inch, this clamp won't seat and you need a heavier flange-range clamp.
2) How much weight can a hammer-on beam clamp with a 1/4-20 stud hold?
The BC18ST is rated for a 75 lb load. That's enough for a suspended box, small fixture, or a light run of conduit hung from a threaded rod. Anything heavier belongs on a bolted clamp or a rod hanger sized for the load.
3) Does the Minerallac BC18ST come with the stud, or do I order that separately?
The 1/4-20 x 3/8 inch stud ships attached to the clamp. Nothing else is included, so the nut, threaded rod, coupling, or box hanger you're fastening to comes from your own stock.
4) Can I hang something off the side of the BC18ST instead of straight down from the stud?
Yes. Besides the stud, the clamp carries 1/4-20 thread impressions on both the bottom and the back, two tapped holes in total. That lets you take a drop straight down off the bottom or pick up a fixture off the back face, so you can hang perpendicular to the beam without adding a bracket.
5) Do I need a drill or a bolt to install a Minerallac hammer-on beam clamp?
No drilling, no bolting, no welding. The BC18ST is spring steel, 0.042 inch thick, and you drive it onto the beam flange with a hammer. The spring tension of the steel is what holds it. That's the whole reason electricians reach for these on overhead work, one hand and a hammer from a lift.
6) Is the Minerallac BC18ST made in the USA for a Buy American job?
Country of origin on the BC18ST beam clamp is the United States. That matters on federally funded and many institutional projects where domestic-sourced material has to be documented on the submittal.
7) What thread size do I match to the BC18ST stud and tapped holes?
Everything on this clamp is 1/4-20. The supplied stud is 1/4-20 x 3/8 inch and both tapped holes are 1/4-20, so order 1/4-20 nuts, 1/4-20 threaded rod, or box hangers tapped 1/4-20. Ordering 3/8-16 rod, which is the other common hanger thread, will not thread into this clamp.
8) Is the BC18ST finish suitable for a damp or unheated building?
The clamp is zinc phosphate and oil finished, black in color. That's a coating meant for dry interior structural steel, parking decks, plants, and warehouses. For sustained wet exposure or exterior work, a galvanized or stainless clamp is the better call.
9) How much room does the Minerallac BC18ST take up on the beam?
The clamp body measures 1.46 x 1.75 x 1.42 inches. It's a compact footprint, so you can set several along a joist for a conduit run without them crowding each other or fouling adjacent trades' hangers.
How fast can I get the Minerallac BC18ST 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 BC18ST come with a warranty?
Absolutely. The Minerallac BC18ST 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 BC18ST?
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 BC18ST from ZenSupply?
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