225 SDC 3-3/4" Self-Drilling I-Lag™ Eye Lag Screw for Drywall and Steel

The 225 SDC eye lag screw is intended for interior overhead tension applications where an installer must pass through two or three layers of 5/8-inch drywall and secure directly into 16 to 22-gauge sheet metal. It combines a self-drilling point, threaded shank, depth collar, and open eyelet in one component. This creates a defined attachment point for ceiling wire or jack chain without a separate pilot hole through the finished surface.

At Hook and Hanger, we supply this fastener in boxes of 100 for commercial work. Its drill point-to-collar length is about 2 1/2 inches, providing clearance for multi-layer gypsum assemblies before the threads engage the metal substrate. The collar creates a physical stop at the surface to help prevent overdriving into drywall, while the eyelet accepts wire or chain before or after installation.

Establishing Stable Wiring Paths With the 225 SDC Eye Lag Screw

A ceiling support layout depends on each attachment point being suited to its base material. The 225 SDC eye lag screw is designed for steel-backed drywall assemblies, not wood framing or general-purpose fastening. Its self-drilling tip passes through the board layers and cuts into 16 to 22-gauge steel, reducing the separate drilling steps that can slow work above finished areas.

The open eye is designed to accommodate 12-gauge ceiling wire. It may also be pre-tied to ceiling wire or jack chain before driving, which can simplify repetitive suspension work when crews are laying out cable management routes or building a suspended ceiling grid. Use the fastener only in interior tension applications and follow the engineered support layout, applicable code requirements, and the pole-tool manufacturer’s instructions.

The yellow zinc-plated finish is suited to standard indoor commercial environments. The product is identified as eco-friendly, RoHS-compliant, and compliant with the American Recovery and Reinvestment Act. It's listed ICC-ES documentation is ESR-3135, and quality-control testing is stated as being performed at an A2LA ISO/IEC 17025 accredited Q-Lab. Hook and Hanger can help purchasing teams obtain the documentation needed for project review.

Sizing and Technical Specifications for the 225 SDC Eye Lag Screw

Confirm the existing assembly, steel gauge, and required support method before installation.

• Overall length: about 3 3/4 inches.

• Thread length: about 2 1/4 inches.

• Collar-to-drill-point length: about 2 1/2 inches.

• Thread profile: 1/4-inch – 14BSD.

• Substrate range: 16 to 22 gauge sheet metal after two or three 5/8-inch drywall layers.

• Eyelet: accommodates 12-gauge ceiling wire.

• Finish: yellow zinc plated.

• Packaging: 100 pieces per box.

• Limitation: interior tension applications only.

• Compatible tools: Lagmaster®, Lagmaster® A+®, Lagmaster® Plus®, and PurlinMaster™ pole tools.

The collar stops the fastener against the board face instead of allowing the eye head to pull into softer gypsum. The extended shank then carries the threads into the sheet metal, where the attachment is formed. The 225 SDC eye lag screw is a targeted solution for the specified drywall and steel range, not a substitute for a structural attachment where plans call for different approved hardware.

Standard Installation Procedures and Structural Integration Workflows

Before driving the 225 SDC eye lag screw, verify the attachment location, identify the intended steel member, and confirm that the assembly is within the stated drywall and gauge limits. Pre-tie ceiling wire or jack chain when it suits the sequence of work. Load the eyelet into the appropriate Lagmaster® or PurlinMaster™ tool head fitted to compatible extension poles. This lets trained personnel install from the floor when job conditions and tool instructions permit, reducing repeated overhead access steps.

Drive the fastener square to the surface. Apply controlled pressure so the drill point clears the gypsum and begins cutting into the metal without skidding. Stop when the collar seats against the board face. Inspect the installed location and ensure the wire or chain connection follows the approved overhead plan.

The completed eye provides an accessible point for wire-based runs and jack chain drops. It can serve in the routing context around j-hooks and other pathway hardware, but every component must be selected and spaced according to the system design. Where a different attachment method is required, compare available eye lag screws, purlin clips, angle clips, beam clamps, or threaded rod fasteners against the structural member and load requirements. These components serve different attachment conditions and are not interchangeable.

Advantages of a Self-Drilling Eye Lag Layout

For the stated application, the 225 SDC eye lag screw combines penetration, metal engagement, and a wire attachment eye in one component. It also provides a defined collar stop for work through drywall and an eyelet sized around 12 gauge ceiling wire. Those features support a consistent installation sequence across repetitive ceiling locations.

Pole-tool compatibility is another practical benefit. When paired with correct driving equipment, the fastener supports ground-based installation methods for many ceiling locations. This is useful in overhead drilling and anchoring work where repeated access changes can interrupt the layout. The yellow zinc finish is intended for ordinary indoor service; separately evaluate installations exposed to moisture, corrosive conditions, or special coating requirements.

Source the Required Hardware From Hook and Hanger

Hook and Hanger supplies hardware for commercial ceiling, wire-routing, and overhead support work. We stock the 225 SDC eye lag screw for contractors and purchasing agents who need a self-drilling eye attachment for the stated drywall-to-sheet-metal configuration. Match it to the approved support design, select the correct installation tool, and maintain the product’s interior tension-use limitation during planning.

Secure Your Commercial Hardware Inventory Directly From Hook and Hanger

Choosing Hook and Hanger gives your crew access to practical overhead support hardware for defined commercial installation conditions. We supply the 225 SDC eye lag screw with its self-drilling point, integrated collar, and eyelet configuration for drywall-to-sheet-metal applications that meet the stated specifications.

To order these eye lag screws or review compatible ceiling support hardware, visit hookandhanger.com. For technical support, documentation, or delivery coordination, call 805-583-9920 or email info@hookandhanger.com.