175 SD 3-1/4" Self-Drilling I-Lag™ Eye Lag Screw for Drywall and Steel

Commercial ceiling work often involves cold-formed steel framing hidden behind two layers of fire-rated gypsum board. The 175 SD eye lag screw is designed for that assembly. Its hardened self-drilling point passes through two 5/8-inch drywall layers and drills directly into 16 to 22-gauge sheet metal without a separate pilot hole. This reduces drilling steps, tool changes, and ladder movement at planned support points.

Hook and Hanger supplies this fastener with a wide integrated depth-control collar and an open eyelet head. The collar seats against the gypsum face to limit over-driving, while the eyelet allows ceiling wire or jack chain to be tied before installation. We stock commercial 1,000-piece boxes, allowing purchasing teams to equip multiple installers through one shipment.

Establishing Stable Wiring Paths with the 175 SD Fastener Series

The 175 SD eye lag screw forms a threaded attachment point in sheet metal for approved tension-only overhead support applications. Its 1/4-inch–14BSD thread profile cuts mating threads into the steel framing after the drill point clears the drywall assembly. The extended threaded section maintains metal contact, creating a dedicated anchor point for ceiling wire, jack chain, and specified components that support cable management pathways.

A short fastener may not reach the steel with sufficient thread engagement, while a standard lag can require pre-drilling at every support location. The 175 SD eye lag screw is configured to clear the gypsum barrier before threading into 16 to 22-gauge steel. Installation must still follow the approved support layout, local code requirements, and the load limits stated in the project documents.

This 175 SD configuration is documented to ICC-ES Evaluation Report ESR-3135 and RoHS requirements. Quality-control testing through an A2LA ISO/IEC 17025 accredited Q-Lab supports consistent dimensions and mechanical performance. Hook and Hanger can provide available product records for submittal packages, including documentation needed for projects with American Recovery and Reinvestment Act requirements.

Sizing and Technical Specifications for the 175 SD Eye Lag Screw Series

The 175 SD eye lag screw is configured for double-layer drywall and sheet-metal framing:

• Overall length: 3 1/4 inches from eyelet head to drill point.

• Thread length: Approximately 1 3/4 inches, with a 1/4-inch–14BSD profile.

• Collar-to-point clearance: Approximately 2 inches, sized to pass two 5/8-inch fire-rated drywall layers.

• Steel range: Self-drilling point for 16 to 22 gauge sheet metal.

• Stop collar: Wide metal collar distributes bearing pressure at the gypsum face and helps prevent over-driving.

• Eyelet hole: Accommodates standard 12-gauge ceiling wire.

• Finish: Yellow zinc plating for resistance to oxidation in normal indoor commercial environments.

• Pre-tied setup: Open eyelet accepts ceiling wire or jack chain before driving.

• Tool interface: Compatible with Lagmaster® pole tools and matched extension poles.

• Use condition: Intended for approved tension-only support configurations.

Before installation, verify the framing member, steel gauge, support spacing, wire type, and total suspended load. For different substrates or support methods, we also supply related eye lag screws for specified overhead work.

Standard Installation Procedures and Structural Integration Workflows

Locate the steel framing member and confirm that the planned point will enter the required 16 to 22-gauge steel after clearing the drywall layers. Tie the ceiling wire or jack chain through the eyelet first when the sequence calls for it. Load the 175 SD eye lag screw into a matched Lagmaster® chuck, then drive it straight through the ceiling face until the collar seats against the gypsum. Stop when the collar is seated. Continued rotation can damage the threads formed in the sheet metal.

Pole-mounted installation reduces the climbing and repositioning associated with repetitive overhead drilling and anchoring. It helps maintain a consistent tool angle over long rows of points where staging is limited.

Once installed, the eyelet is used only with the support component and configuration shown in the approved drawings. It can provide a wire attachment point for a suspended ceiling or a specified pathway using j-hooks. In tight stud bays, it may be a practical alternative where purlin clips, angle clips, beam clamps, or threaded rod fasteners do not fit the substrate or available clearance. Each alternative must be selected only for its specified structure, capacity, and spacing.

Advantages of Optimizing Overhead Wire Arrays with 175 SD Eye Lag Screw

The 175 SD eye lag screw combines drilling and fastening in one action, removing the separate pilot-hole step. Its 2-inch collar-to-point clearance is built to get beyond double 5/8-inch drywall before metal engagement begins. The yellow zinc-plated finish supports standard indoor commercial use, and the integrated collar limits damage to the gypsum face from excessive penetration.

The open eyelet supports pre-tied wire or jack chain, while the matched pole interface allows crews to install from the floor rather than repeatedly moving ladders. We supply documentation and volume-order coordination for commercial planning, field verification, and procurement.

Get All Your Installation Supplies under One Roof with Hook and Hanger

Hook and Hanger stocks the 175 SD eye lag screw with related components used in commercial overhead pathways, ceiling support, and metal-framing attachment. Our nationwide distribution process supports direct delivery to jobsites and central warehouses.

Before placing an order, confirm the ceiling assembly, framing gauge, support load, and approved installation method. We offer product identification, technical documentation, and larger-order coordination for scheduled installation.

Secure Your Commercial Hardware Inventory Directly From Hook and Hanger

Choosing Hook and Hanger gives your crew access to dependable overhead support hardware for specified commercial applications. The 175 SD eye lag screw provides a self-drilling point, controlled drywall clearance, integrated stop collar, and open eyelet for approved tension-only ceiling support work.

To order 175 SD eye lag screw inventory or review compatible support hardware, visit hookandhanger.com. For technical support, bulk-order coordination, or submittal documentation, call our specialist team at 805-583-9920 or email info@hookandhanger.com.