GAF Materials Corporation
1361 Alps Road
Wayne, NJ 07470
Tel: (800) 766-3411
Web site: http://www.gaf.com

GYPSUM, TECTUM®, LIGHTWEIGHT DECKS

PRODUCT DESCRIPTION
The Drill-Tec NTB-1HWO is a glass-filled nylon auger fastener with a 1" head. It is designed to secure insulation and single-ply membrane to gypsum, all cementitious wood fiber decks (Permadeck, Insulrock, Tectum®, etc.) and certain lightweight concrete decks.
The NTB-1HWO may be used with a 3" steel plate for insulation attachment. For single-ply membrane attachment, use a 2" steel plate (with barbs) or batten bar. The NTB-1HWO is available in 2 1/2" to 10" lengths. The NTB-1H is Factory Mutual and Dade County approved.

APPLICATION
The Drill-Tec NTB-1HWO can be installed into Tectum® decks without predrilling. A pilot hole is required for gypsum, lightweight concrete, and some cementitious wood fiber. Use a 7/16", 1/2" or 9/16" drill bit. Diameter of drill bit is determined by pullout test results. Hole depth must be 1/2" deeper than embedment.
Minimum fastener embedment into the deck should be 1 1/2" (2" recommended). The NTB fastener should never penetrate the underside of the deck.
The use of a 3" plate is recommended for securing insulation.
Note: Be careful not to overdrive the fastener, causing subsequent damage to the insulation facer.
 
PHYSICAL DATA
SKU #
Length
Packaging
Weight
The data below is constant for each Drill-Tec ASAP® 3S Fastener.

Head Size:         1" Diameter

Head Style: Double Internal Hex Drive

Major
Thread
Diameter:      .750

Thread: 3.5 T.P.I. Buttress

Material:                       Glass-Filled                                 Nylon
 
 45CA
 2 1/2"
 500
 13 lb
 45CB
 3"
500
 15 lb
 45CC
 3 1/2"
500
 17 lb
45CD
 4"
 500
  19 lb
45CE
 4 1/2"
 500
 21 lb
45CF
 5"
 500
 24 lb
45CG
 5 1/2"
  500
 26 lb
 45CH
 6"
 500
 28 lb
 45CI
 6 1/2"
 500
29 lb
45CJ
7"
500
30 lb
45CK
7 1/2"
500
32 lb
 45CL
 8"
250
 16 lb
45CM
8 1/2"
250
17 lb
45CN
9"
250
18 lb
45CO
9 1/2"
250
19 lb
45CP
10"
250
20 lb

Fast Facts
The Drill-Tec NTB-1HWO with a 1" head is a glass-filled nylon auger fastener designed to secure insulation and single-ply membrane to gypsum, all cementitious wood fiber, Tectum® and certain lightweight concrete decks.

FEATURES & BENEFITS
•Thread design & large root diameter:
­ Increase pullout resistance
­ Increase side shear strength
•Made from glass-filled nylon which:
­ Eliminates corrosion
­ Eliminates thermal bridging and
condensation
­ Yields high tensile strength
•The Drill-Tec NTB-1HWO is F.M. and Dade County approved.

PLATES & ACCESSORIES
Use 3" steel plate, 2" steel plate (with barbs), or batten bar. See Plates section.
Use a carbide tip drill bit for gypsum, lightweight concrete, and some cementitious wood fiber applications.

DRILL-TEC™ NTB® -1HWO
SPECIFICATION
The fastener will be a Drill-Tec NTB-1HWO Fastener with a 1" head and a major thread diameter of .750. The Drill-Tec NTB-1HWO will be used with a Factory Mutual approved Drill-Tec steel or plastic plate or batten bar. The fastener must be Factory Mutual approved and made in America.

APPLICATION
The Drill-Tec NTB-1HWO Fastener must penetrate the deck a minimum of 1 1/2" (2" recommended). The fastener must not penetrate the underside of the deck. The Drill-Tec NTB-1HWO can be installed into Tectum® decks without predrilling. A pilot hole is required for gypsum, lightweight concrete and some cementitious wood fiber decks (Permadeck, Insulrock, etc.). Use a 7/16", 1/2" or 9/16" drill bit. Diameter of drill bit is determined by pullout test results. Hole depth must be 1/2" deeper than embedment. Diameter of hole is determined by pullout results.
Note: Be careful not to overdrive the fastener, causing subsequent damage to the insulation facer. Fastener must be tight enough so that the plate doesn’t turn.

PHYSICAL DATA
Head Style: Double Internal Hex Drive         Head Size: 1"                              Thread: 3.5 T.P.I.
Major Thread Diameter: .750                      Material: Glass-Filled Nylon         Packaging: 250, 500/carton

DRILL-TEC NTB-1HWO LENGTH SELECTION PROCEDURE
1. If applicable, determine thickness of existing roofing material.
2. Add thickness of new insulation.
3. Add 1 1/2" minimum fastener penetration.
NOTE: When predrilling, allow extra 1/2".
4. If odd size requirement, always size up
in length, not down. See example.
Example
Existing Roofing:             1 3/4"
New Insulation:                 1/2"
Min. Embedment:           1 1/2"
Total Fastening               3 3/4"
Range

The proper NTB-1HWO for this example is 4". (2" minimum embedment for all FM applications.)