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Product Details

The MTHG underlay screw is designed for fast and secure underlayment to subfloor and wall installations.

Unlike nails, the MTHG has an intricate thread pattern designed to prevent squeaking by holding underlayment tight to the subfloor and thus preventing pull-out.

Its compact trim-head allows for a flush surface and prevents floor coverings from settling in countersink recesses.

Material

Carbon Steel

Finish

Class 3 Mechanically Galvanised

Features & Benefits
  • Trim Head with Nibs for easy countersinking
  • High-Low Threads for secure holding down of underlayment to timber and steel frame
  • Sharp Point for fast starts saving time on the worksite
  • #2 square drive 
  • 18 TPI
Applications
  • Cement Sheet/Underlay to Timber and Steel
  • Bathroom wall underlay
  • Recommended steel thickness 0.55mm–0.75mm
Model No. Table

Model No.

Size

Thread

Point

Material & Finish

Box Qty

Drive Size

Replacement Bit

These coated fasteners possess a level of corrosion resistance that makes them suitable for use in some exterior and corrosive environments and with some preservative-treated timber.
For applications in higher-exposure applications, consider Type-300 series stainless-steel fasteners for superior corrosion resistance. Bit(s) included with every box of screws.
Pre-drilling and countersink may be necessary at ends, butt joints, and on applications where denser material is used. Follow board manufacturers recommendations where applicable.

MTHG114SA

7G x 32mm

High-Low Threads 18 TPI

Sharp Point

Carbon Steel
Class 3 Mechanically Galvanised

2500

#2 Square

BIT2S-RC10

 
Brochures & Catalogues
Technical Data & Docs

Technical Data Sheets

PDF icon Technical Data Sheet - MTHG

Warranty

Warranty

Alternative Products

Alternative Products

WSCBGA158SA

The WSCBG underlay screw is designed for fast and secure underlayment to subfloor and wall installations. The WSCBGHLA114SA is designed for cement board-to-steel (0.55mm–0.75mm) applications with its Sharp Point and High-Low Threads design.

The CBSDG cement sheet screw is ideal for fixing cement sheeting-to-steel joists. The CBSDG winged self-drilling screw requires no predrilling, making them easier and faster to install than standard winged self-drilling screws. 

BFHSD Bi-Metal Screw Timber-to-Steel - Collated & Loose

The BFHSD is designed to fasten hardwood decking to steel joists without sacrificing performance. This 316 stainless steel bi‑metal screw requires no pre‑drilling, making them easier and faster to install than typical decking screws.

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Structural Connections

 

Unmatched Quality from the Truss to the Foundation

With nearly 60 years of field and R&D experience, Simpson Strong-Tie® timber connectors are manufactured to the industry's highest standards. From framing angles to straps to heavy-duty joist hangers, we offer the most diverse product line so that you have the right product for the job.

Simpson Strong-Tie® connectors offer unmatched quality with laboratory and field testing, and are backed by our uncompromising commitment to customer service. As the company that built the connector industry, you can count on Simpson Strong-Tie® to work closely with builders, engineers and building officials to deliver innovative, building code-compliant solutions to help build safer, stronger structures economically. Download the Structural Connectors Overview Flyer.

Timber Connectors

From testing to service to availability, everything we do is engineered to ensure your project's success. With every product, you know you are getting the quality, value, service and on-time delivery that we have built our reputation on for the past 60 years.

From straps and ties to joist hangers and much more, Simpson Strong-Tie® structural connectors increase the strength and safety of timber-frame structures. Each connector is unique to Simpson Strong-Tie and is designed for specific applications without the need to adapt metal plating to suit a connection. Download the Timber Construction Connectors Catalogue (2016-2018).