The Simpson DIA50S DIAS Short Drop-In Internally Threaded Anchor is a flush-mount expansion anchor engineered for concrete applications where shallow embedment is a priority. Its internally threaded design accepts 1/2 in. threaded rod, making it well suited for suspended systems, overhead connections, and flush-mount fastening in solid base materials. The short DIAS configuration is purpose-built for situations where standard-depth drilling risks contact with rebar or pre-stressed and post-tensioned cables - delivering reliable anchorage without compromising the integrity of the substrate.

Key Features

• Flush-mount expansion anchor for concrete applications - sits level with the surface for clean, unobtrusive installations that do not protrude above the base material
• Lipped edge of DIAS eliminates need for precisely drilled hole depth - reduces the margin for installation error and keeps results consistent even when hole depth varies slightly
• Short length enables shallow embedment - helps avoid drilling into rebar or pre-stressed and post-tensioned cables that may be present beneath the surface, protecting structural integrity
• Includes a compatible setting tool - ensures the anchor is driven to the correct depth every time, supporting uniform expansion and repeatable load performance across the job
• Carbon steel construction with zinc plated finish - provides the structural strength expected in concrete fastening applications along with a corrosion-resistant surface treatment
• Internally threaded at 13 TPI for 1/2 in. rod - mates directly with standard 1/2 in. threaded rod, simplifying hardware selection and assembly on-site
• Caution: oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity - using the specified 5/8 in. drill bit is essential to achieving full holding strength and proper anchor expansion

Why This Product

• Designed for sensitive concrete substrates - the short DIAS body keeps embedment shallow, making this anchor the practical choice when rebar or post-tensioned cables are close to the surface and a full-depth hole would create risk
• Installation-friendly lipped edge - because the lip registers against the surface, contractors do not need to hit an exact hole depth, reducing setup time and the chance of a misset anchor on busy job sites
• Complete, ready-to-install package - the included setting tool is matched to this specific anchor, so there is no need to source a separate tool or guess at the correct driver, supporting consistent results from the first anchor to the last
• Trusted Simpson engineering in a flush-mount format - backed by Simpson's focus on precision fastening hardware, this internally threaded drop-in anchor delivers secure, load-bearing connections in solid concrete without any hardware visible above the surface plane

Specifications

• MPN: DIA50S
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Bolt/Rod Diameter (in.): 1/2
• Drill Bit Diameter (in.): 5/8
• Length (in.): 1
• Thread Length (in.): 5/16
• TPI: 13
• Packaging: Packs of 50 and Cartons of 200

Frequently Asked Questions

What is the purpose of the lipped edge on the DIAS short drop-in anchor?

The lipped edge of the DIAS anchor eliminates the need for a precisely drilled hole depth, making installation more forgiving and consistent across varying drilling conditions.

Why would I choose the short DIAS version over a standard-length drop-in anchor?

The short length of the DIAS enables shallow embedment, which helps avoid drilling into rebar or pre-stressed and post-tensioned cables that may be present within the base material.

Does the DIA50S include a setting tool?

Yes. Short drop-in anchors include a setting tool compatible with the anchor to ensure consistent installation.

What happens if the drilled hole is oversized?

Oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity. It is important to use the specified 5/8 in. drill bit diameter for proper installation.

Note: Product dimensions may differ from picture. Please see item description for specifications. Minimum thread engagement should be equal to the nominal diameter of the threaded insert.