EMT two hole straps are metal mounting fittings used to secure electrical metallic tubing (EMT) to a wall, ceiling, rack, or other supporting surface. I recommend selecting them by matching the strap’s nominal EMT size, material, coating, hole pattern, and installation environment rather than by outside diameter alone. For most projects, the correct strap should hold the conduit firmly without crushing it, provide stable support, and remain compatible with the fixing method and local electrical requirements. As an aluminum pipe and conduit fitting supplier, SIOSAN can help B2B buyers review drawings, confirm dimensions, and organize suitable production quantities.
This guide explains the main EMT two hole strap options, how to select the correct size, and what to check before installation or bulk purchasing. It also covers practical issues such as material selection, corrosion exposure, screw compatibility, packaging, MOQ, and supplier evaluation. Because project codes and installation conditions vary, the final choice should always be checked against the applicable electrical standard and the authority having jurisdiction.
This guide is intended for electrical contractors, conduit wholesalers, panel builders, MRO buyers, construction procurement teams, and distributors sourcing EMT two hole straps. It is also useful for engineers who need to specify a mounting accessory for commercial, industrial, residential, or infrastructure projects. I focus on purchasing decisions that affect fit, installation consistency, service life, and supply reliability.
Buyers working with aluminum conduit or aluminum pipes should pay particular attention to galvanic compatibility, surface protection, and the installation environment. A strap that performs adequately in a dry indoor area may require a different material or coating for outdoor, coastal, chemical, or high-humidity applications. When the application is unclear, I recommend confirming the base metal, coating system, and environmental exposure before requesting a quotation.
An EMT two hole strap is a conduit support with two mounting holes positioned on opposite sides of the conduit opening. The two-point fixing arrangement helps keep the tubing aligned and reduces rotation compared with a single-hole strap. The strap is normally installed over the outside of EMT and fastened to a supporting surface with screws, anchors, or other approved hardware.
The strap is not a replacement for a connector, coupling, grounding component, or conduit body. Its primary function is mechanical support and positioning. The quantity and spacing of supports should be determined from the applicable code, project specification, conduit material, and site conditions rather than from a generic product description.
EMT two hole straps are commonly identified by nominal trade size, such as 1/2 inch, 3/4 inch, 1 inch, 1-1/4 inch, 1-1/2 inch, 2 inch, and larger sizes. Nominal trade size is not always the same as the actual outside diameter, so I advise buyers to confirm the required conduit outside diameter and the strap’s internal clearance. A small dimensional mismatch can make installation difficult or allow unwanted movement after tightening.
For example, a buyer may need straps for 1/2-inch EMT, 1-inch EMT, or 2-inch EMT, but the exact working dimensions should be verified against the selected tubing standard and manufacturer drawing. Dimensional tolerances, forming radius, material thickness, mounting-hole diameter, and hole center distance can all influence fit. A supplier should provide a dimensioned drawing or sample approval process when the application is production-critical.
| Specification | What to Confirm | Why It Matters |
|---|---|---|
| Nominal size | Required EMT trade size and actual outside diameter | Prevents loose or overly tight fit |
| Material | Steel, stainless steel, aluminum, or other specified metal | Influences strength, weight, and corrosion behavior |
| Finish | Plain, zinc-coated, painted, or project-specified coating | Helps match the exposure and appearance requirements |
| Mounting holes | Hole diameter, center distance, and edge clearance | Ensures compatibility with screws and anchors |
Steel straps are often selected when buyers need a rigid, economical support for general indoor installations. A zinc-coated finish may provide additional surface protection compared with uncoated steel, but the actual suitability depends on the coating type, coating thickness, installation environment, and project specification. I do not recommend treating a zinc finish as automatically suitable for continuous wet, coastal, or chemically aggressive exposure.
Steel can be a practical choice when the conduit system and surrounding hardware are also steel-based. Buyers should still inspect cut edges, scratches, and contact points because damage to a protective finish can affect long-term corrosion performance. For outdoor or corrosive environments, request the supplier’s available coating options and confirm them against the project requirements.
Stainless steel two hole straps may be appropriate where corrosion resistance and surface durability are important. The grade should be stated clearly in the quotation because different stainless steel grades have different chemical and environmental resistance. Stainless steel can also increase purchase cost, so it is most useful when the exposure conditions justify the upgrade.
Aluminum straps are lightweight and can be considered for aluminum conduit systems or projects where reducing component weight is useful. However, aluminum-to-metal contact should be reviewed for galvanic corrosion risk, particularly in the presence of moisture or electrolytes. I recommend checking whether an isolation layer, compatible fastener, or specified coating is required by the project engineer.
Start with the conduit material and nominal size, then review the environment and support surface. Indoor dry locations may allow a broader range of standard materials, while outdoor, marine, wastewater, food-processing, and chemical-processing areas may require more careful material and finish selection. The strap should also fit the wall, channel, rack, or structural member without forcing the conduit out of alignment.
Next, check whether the project requires a particular appearance, installation method, or corrosion category. If the straps will be installed near aluminum pipes, aluminum conduit, or dissimilar metal supports, ask for a compatibility review rather than selecting only by price. For prefabricated assemblies, the mounting-hole pattern and fastener access may be as important as the strap size.
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Identify the conduit’s nominal trade size and verify its actual outside diameter from the tubing specification or approved drawing. Do not assume that a strap labeled with the same nominal size will fit every product without dimensional review. For repeat orders, I recommend approving a first sample before releasing the full purchase order.
Record whether the installation is indoor, outdoor, underground, humid, coastal, dusty, or exposed to chemicals. Also note whether the strap will contact aluminum, galvanized steel, stainless steel, painted surfaces, or another material. These details help the supplier recommend a suitable base material and finish without making unsupported assumptions.
Confirm the screw or anchor diameter, head style, hole diameter, and available installation clearance. A two hole strap is only useful when both mounting holes can be reached and fastened securely. If the supporting surface is concrete, masonry, metal framing, or wood, the anchor selection should be handled according to the substrate and project requirements.
Support spacing is governed by the applicable electrical code, conduit type, installation orientation, and local requirements. I recommend that the contractor or engineer confirm the required spacing instead of relying on a general distance stated by a supplier. The strap manufacturer can provide product dimensions, but the project authority determines whether the complete installation is compliant.
During installation, place the strap around the EMT without deforming the tubing, align the two holes with the prepared support surface, and tighten the fasteners evenly. The strap should secure the conduit while avoiding excessive compression. If the conduit can rotate, rattle, or shift after tightening, stop and check the size, support surface, and fastening method.
One common mistake is ordering by a nominal label without checking actual dimensions. Another is using a finish that does not match the exposure, such as selecting an unprotected steel component for a persistently wet location. Buyers also sometimes overlook hole spacing, resulting in a strap that fits the conduit but cannot be installed efficiently on the selected channel or wall system.
Over-tightening is another avoidable problem because it may damage the conduit, coating, or strap edge. Under-tightening can permit movement and reduce the stability of the installation. I recommend using the fastener manufacturer’s guidance, the project specification, and the installer’s approved procedure rather than assigning a universal torque value without supporting data.
Pricing for EMT two hole straps depends on material, thickness, finish, size range, tooling, packaging, order quantity, and inspection requirements. Standard sizes and finishes are usually easier to source than custom dimensions, but availability varies by supplier and production schedule. Buyers should request a quotation that separates product cost, tooling or sample charges, packaging, and shipping terms.
MOQ may be different for standard items and customized products. A supplier may be able to combine several sizes in one production plan, but this should be confirmed before placing the order. Lead time should also distinguish between sample approval, production, inspection, and dispatch, because these stages affect the project schedule differently.
SIOSAN serves B2B customers seeking aluminum pipes, conduit-related components, and metal mounting solutions. We can review your required EMT sizes, material preferences, finish requirements, mounting-hole details, packaging needs, and destination-market documentation before preparing a quotation. Where exact fit is important, I recommend sharing a drawing, sample, or conduit outside-diameter requirement so our team can evaluate the specification accurately.
Our support can include product selection assistance, dimensional confirmation, sample coordination, private-label or packaging discussions where applicable, and production communication for repeat orders. We do not treat one material or finish as suitable for every environment. Instead, we work from the information provided by the buyer and identify which details still require engineering or code confirmation.
The right EMT two hole strap is the one that matches the conduit dimensions, installation environment, support surface, material compatibility, and project requirements. I recommend confirming the nominal size and actual outside diameter first, then selecting the material and finish based on exposure rather than appearance or lowest cost. Finally, verify mounting-hole details, fastener compatibility, support spacing, sample approval, and delivery terms before releasing a bulk order.
If you are sourcing EMT two hole straps for aluminum pipes, conduit assemblies, electrical installations, or distribution inventory, prepare the size list, application environment, material preference, finish, estimated quantity, and delivery destination. Send these details to SIOSAN for a practical specification review and quotation discussion. This approach helps reduce dimensional errors, avoid unsuitable material combinations, and create a clearer purchasing decision for your project.
Contact us to discuss your requirements of EMT Two Hole Straps. Our experienced sales team can help you identify the options that best suit your needs.