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Simpson Strong-Tie No. 7 X 1-1/4 in. L Square Gray Phosphate Coated High/Low Exterior Wood Screw 250

A low-profile trim head and aggressive high/low thread keep underlayment flat and locked down without splitting the panel.
Simpson Strong-Tie MPN MTH114S In Stock & Ready to Ship
$149.99
Free shipping on orders over $75
Only 10 left
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

Simpson Strong-Tie built the MTH114S for one job: fastening underlayment tight and flat before flooring goes down. The trim head sits low and won't interfere with tile, vinyl, or hardwood installed over it, while the No. 7 shank keeps the screw slim enough to avoid splitting thin plywood or OSB panels. High/low thread design bites into wood fast and holds without stripping, and the square drive keeps the bit locked in place so you're not fighting cam-out on a floor full of screws.

Gray phosphate coating adds corrosion resistance, so these hold up in outdoor and exterior-adjacent applications, not just dry interior subfloors. Sold in a 2500-count box, this is a contractor-volume pack meant for full room or deck-sized underlayment jobs rather than small patch work.

  • Length: 1-1/4 in.
  • Callout size: No. 7
  • Head type: Trim
  • Drive style: Square
  • Thread type: High/Low
  • Finish: Gray phosphate coated steel, rated for outdoor use

The Details Specifications

Brand Simpson Strong-Tie
Model / MPN MTH114S
UPC 746056055136
Weight 11 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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04

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