Dimensions Guide
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1000 
ICC-ES Evaluation Report  ESR-1078 
  Reissued January 2017 
Revised March 2017 
  This report is subject to renewal January 2018. 
www.icc-es.org | (800) 423-6587 | (562) 699-0543   A Subsidiary of the International Code Council 
®
DIVISION: 06 00 00—WOOD, PLASTICS AND 
COMPOSITES 
Section: 06 05 23—Wood, Plastic, and Composite 
Fastenings 
REPORT HOLDER: 
OMG, INC. 
153 BOWLES ROAD 
AGAWAM, MASSACHUSETTS 01001-5008 
(800) 518-3569 
www.olyfast.com 
www.fastenmaster.com 
mguthrie@olyfast.com 
ADDITIONAL LISTEE: 
MITEK INDUSTRIES, INC. 
14515 NORTH OUTER FORTY, SUITE 300 
CHESTERFIELD, MISSOURI 63017 
(314) 434-1200 
www.mii.com 
EVALUATION SUBJECT: 
FASTENMASTER
®
  LOK  SERIES  STRUCTURAL  WOOD 
SCREWS 
1.0  EVALUATION SCOPE 
Compliance with the following codes: 
 2015,  2012,  2009  and  2006  International  Building 
Code
®
 (IBC) 
 2015, 2012,  2009 and 2006  International  Residential 
Code
®
 (IRC) 
 2013 Abu Dhabi International Building Code (ADIBC)
† 
†
The ADIBC is based on the 2009 IBC. 2009 IBC code sections referenced 
in this report are the same sections in the ADIBC 
Properties evaluated: 
 Structural 
 Corrosion resistance 
2.0  USES 
The FastenMaster LOK Series fasteners described in this 
report are alternate dowel-type threaded fasteners used for 
wood-to-wood connections. 
The  FastenMaster LOK  Series fasteners  described  in 
Sections 3.1.1 through 3.1.4 may be used where fasteners 
are required to exhibit corrosion resistance when exposed 
to  adverse  environmental  conditions  and/or  in 
preservative-treated  wood  (subject  to  the  limitations  of 
Section 5.2), and are alternates to hot-dip-zinc galvanized 
fasteners  with  a  coating  weight  in  compliance  with ASTM 
A153, Class D. The fasteners have been evaluated for use 
with  wood  chemically  treated  with  waterborne  alkaline 
copper quaternary, type D (ACQ-D). 
3.0  DESCRIPTION 
3.1  General: 
The  LOK  Series  fasteners  described  in  this  report  are 
manufactured  using  a  standard  cold-forming  process  and 
are  heat-treated.  These  fasteners  depart  from  ANSI 
B18.2.1 and B18.6.1 in thread design, exceed the bending 
yield strengths documented in Table 5 of American Forest 
&  Paper  Association  (AF&PA)  Technical  Report  12,  and 
are  not  installed  with  lead  holes  in  accordance  with  the 
ANSI/AWC National Design Specification (NDS) for  Wood 
Construction. The LOK Series fasteners recognized in this 
report  are  described  in  Sections  3.1.1  through  3.1.5. 
Product names for fasteners  sold by MiTek  Industries are 
shown in Table 7. 
3.1.1  OlyLog  and  TimberLOK  Fasteners:  The OlyLog 
and  TimberLOK  fasteners  have  a 
5
/
16
-inch  (7.9  mm)  
hex-head,  rolled  threads  and  a  gimlet  point. They  have  a 
proprietary  corrosion-resistant  coating  with  a  lubricious 
clear top coat. See Table 1A for fastener dimensions and a 
diagram. 
3.1.2  HeadLOK  Fasteners:  The  HeadLOK  fasteners 
have a proprietary #3 Spider-drive head, rolled threads and 
a gimlet point. They have a proprietary corrosion-resistant 
coating.  See  Table  1B  for  fastener  dimensions  and  a 
diagram. 
3.1.3  LedgerLOK  and  LogHog  Fasteners:  The 
LedgerLOK  and  LogHog  fasteners  have  a 
5
/
16
-inch 
(7.9 mm) hex-head with integral washer, rolled threads and 
a  gimlet  point.  The  LedgerLOK  fasteners  have  a 
proprietary  corrosion-resistant  coating  with  a  lubricious 
clear  top  coat.  The  LogHog  fasteners  have  a  proprietary 
corrosion-resistant  coating.  See  Table  1C  for  fastener 
dimensions and a diagram. 
3.1.4  TrussLOK  and  TrussLOK-Z  Fasteners:  The 
TrussLOK  and  TrussLOK-Z  fasteners  have  a 
3
/
8
-inch 
(9.5  mm)  hex-head,  rolled threads  and  proprietary cutting 
points. They have a proprietary corrosion-resistant coating 
with a lubricious clear top coat. See Tables 1D and 1E for 
fastener dimensions and a diagram. 










