Duro-Last HD Screws User Manual

DURO-LAST® HD SCREWS

Description:

Duro-Last®, Inc. requires the use of Duro-Coated
Screws for mechanical fastening of the Duro-Last
roofing system. Duro-Last HD Screws are #14
diameter, are equipped with a P-3 truss head and are
available with either a drill point or a spade point.

Duro-Last HD Screws can be used in most types of
roofing applications. The se Duro-Coat ed Screws must
pass twice the FM 4470 standard for corrosion
resistance, totaling 30 cycles in a Kesternich cabinet.
Duro-Last, Inc. also requires that all Duro-Coated
Screws pass 20º and 40º bend tests (hardness) and
be able to penetrate a 20 gauge deck in under three
seconds with a 50 lb. (222 N) load.

Installation:

1. Penetration into all approved deck types is 1 inch
(25 mm) minimum, from the top surface of the
deck.

Note:

 Duro-Last, Inc. stocks HD screws in the sizes

noted in the table to the right. Additional sizes are
available on a drop ship basis. Please allow
adequate time for ordering and delivery of special
orders.

DATA SHEET

HD SCREW DIMENSIONS

Length Thread Length

1.5 in. (38 mm) 1.5 in. (38 mm)
2 in. (51 mm) 2 in. (51 mm)

2.5 in. (64 mm) 2. 5 in. (64 mm)
3 in. (76 mm) 3 in. (76 mm)

3.5 in. (89 mm) 3 in. (76 mm)

4 in. (102 mm ) 3 in. (76 mm)

4.5 in. (115 m m) 3 in. (76 mm)
5 in. (127 mm ) 4 in. (102 mm)

5.5 in. (140 m m) 4 in. (102 mm)
6 in. (152 mm ) 4 in. (102 mm)
7 in. (178 mm ) 4 in. (102 mm )
8 in. (203 mm ) 4 in. (102 mm)
9 in. (229 mm ) 4 in. (102 mm)

10 in. (254 mm) 4 in. (102 mm)
11 in. (279 mm) 4 in. (102 mm)
12 in. (305 mm) 4 in. (102 mm)

Quantity per

Bucket

1000
1000
1000
1000
1000
1000
1000
1000
1000
1000

500
500
500
500
500
500

Duro-Last: The Proven Performer®

www.duro-last.com

"Duro-Last " an d " The World's Best Roof" are registered marks owned by Duro-Las t , Inc.

18

800-248-0280

Revised: 4/6/2011