GAF Drill-Tec LD Fastener, 2-5/8 in. - 12 in. Lengths, Mill Steel Insulation Screws, Box

Regular price $415.00

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GAF Drill-Tec LD Fastener, 2-5/8 in. - 12 in. Lengths, Mill Steel Insulation Screws, Box


The GAF Drill-Tec LD (Lite-Deck) Fastener secures roof insulation to gypsum and all cementitious wood fiber decks such as Permadeck, Insulrock and Tectum. Available in mill finish lengths from 2-5/8 in. to 12 in., it is sold per box in 6 in. (250/box) and 3 in. (500/box) configurations. Install with a high-torque, variable-speed screw gun without predrilling.


Key Features:

  • Wide deck range: Designed to secure insulation to gypsum and all cementitious wood fiber decks including Permadeck, Insulrock and Tectum.
  • High pull-out resistance: Deep, coarse thread provides high pull-out resistance.
  • No predrilling: Installs into cementitious wood fiber decks without predrilling.
  • FM approved: Factory Mutual approved.
  • Miami-Dade approved: Miami-Dade County Product Control approved.
  • Length options: Available in lengths from 2-5/8 in. to 12 in. (66.7 - 305 mm).
  • Screw-gun install: For best results, use a high-torque, variable-speed screw gun.

Specifications Table:

Specification Details
Brand GAF
Sell unit 1 box (3 in.: 500 fasteners; 6 in.: 250 fasteners)
Product line Drill-Tec LD (Lite-Deck)
Available sizes 6 in. (250/box); 3 in. (500/box); line available in 2-5/8 in. - 12 in. lengths
Available colors Mill
Material Steel fastener
Finish / texture Mill
Length 3 in. or 6 in. (line: 2-5/8 in. - 12 in.)
Pack quantity 250 per box (6 in.); 500 per box (3 in.)
Approvals Factory Mutual; Miami-Dade County Product Control
Intended use Insulation fastening to gypsum and cementitious wood fiber decks
Installation High-torque, variable-speed screw gun; no predrilling in cementitious wood fiber decks

Coverage & How Much You Need:

Not applicable; fasteners are ordered by count. Size quantities per the fastener pattern in the roofing system specification, then choose the box size (6 in. fasteners 250/box, 3 in. fasteners 500/box) that matches the length and count needed.

Fit and Compatibility:

Made for GAF Drill-Tec commercial fastening applications on gypsum and cementitious wood fiber decks (Permadeck, Insulrock, Tectum). Insulation plates/washers and plates are specified separately per system details; confirm plate compatibility with the assembly specification.


Frequently Asked Questions (FAQ):

Q: What sizes are available?
A: The Drill-Tec LD line runs 2-5/8 in. to 12 in.; this page offers 6 in. (250/box) and 3 in. (500/box) options.


Q: What decks does it work in?
A: Gypsum and all cementitious wood fiber decks, including Permadeck, Insulrock and Tectum.


Q: Do I need to predrill?
A: No, it can be installed into cementitious wood fiber decks without predrilling.


Q: What tool should I use?
A: A high-torque, variable-speed screw gun gives the best application results.


Q: Are there approvals?
A: Yes, the Drill-Tec LD Fastener is Factory Mutual and Miami-Dade County Product Control approved.


Q: How many come per box?
A: The 6 in. fasteners come 250 per box and the 3 in. fasteners 500 per box.


Expert Verdict — Reviewed by the SuperArbor Pro Desk

Pick the LD fastener when the deck is gypsum or cementitious wood fiber, and select length so embedment meets the specified penetration below the deck surface; the deep coarse thread is what resists pull-out in these softer decks. Use a high-torque, variable-speed screw gun and set screw clutch depth to avoid overdriving. For FM-insured or Miami-Dade projects, keep the fastener, plate and insulation combination within the approved system details.

Wear eye protection when driving fasteners; follow the screw gun manufacturer's safety instructions and deck manufacturer's embedment requirements.


Order GAF Drill-Tec LD Fasteners for secure insulation attachment on gypsum and wood fiber decks.

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Subject to Approval & Availability
All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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