L H Dottie Co MA7 Machine Screw Anchor 3/8-16

Product Description

The L H Dottie CO MA7 is a 3/8-16 machine screw anchor designed for secure fastening in masonry and concrete substrates. This anchor accepts a 3/8-16 threaded machine screw and provides a reliable expansion hold in block, brick, or poured concrete. It is a hardware accessory used across multiple trades wherever a threaded anchor point is needed in hard substrates. Licensed contractors and skilled tradespeople working in HVAC, plumbing, electrical, and general construction install this type of anchor when attaching equipment supports, conduit hangers, pipe straps, and similar hardware to masonry surfaces.

This anchor is suited for both residential and light commercial applications. Typical installation scenarios include mounting electrical enclosures to concrete block walls, securing pipe hangers to poured concrete ceilings, attaching equipment brackets to masonry, and any other application requiring a permanent threaded fastener point in a hard substrate. The 3/8-16 thread size is a common standard fastener specification found throughout mechanical, electrical, and plumbing work.

Key Features

• 3/8-16 thread size compatible with standard machine screws
• Expansion-style anchor design for masonry and concrete substrates
• Single-unit packaging for targeted replacement or small-quantity use
• Hardware accessory category suitable for multi-trade applications

Compatibility

Designed as an OEM-style replacement or standard-use masonry anchor compatible with 3/8-16 threaded machine screws in concrete, block, and brick substrates.

Installation Notes

Installation is performed by drilling a correctly sized hole in the masonry substrate before inserting the anchor. Power down or de-energize any nearby electrical equipment before drilling near live systems. Use a hammer drill with the appropriate carbide-tipped masonry bit to achieve a clean, properly sized bore. Always follow applicable building codes and the fastener manufacturer guidelines for minimum embedment depth and edge distance.