Technical Specifications
WAFER HEAD
ELIMINATES NEED
FOR WASHER AND
OFFERS INCREASED
PULL THROUGH
STRENGTH.
CHAMFER UNDER
HEAD FOR
INCREASED
STRENGTH.
AGGRESSIVE
THREAD FOR
HOLDING AND
WITHDRAWAL
STRENGTH.
SHARP GIMLET
POINT FOR FAST
INSTALLATION.
SPIDER DRIVE™
SYSTEM DESIGN
OFFERS HIGH LEVEL
OF BIT ENGAGEMENT
AND DRIVABILITY.
NEW SPIDER DRIVE
BIT INCLUDED.
INSTALLATION PROCEDURE
PRODUCT FEATURES
HEAVY DUTY FLATHEAD FASTENER
Using a
1
⁄
2
" high torque drill (14.4 V Cordless or higher) drive the HeadLok head flush to the
surface. No predrilling required when proper end and edge distances are maintained.
* SCL=Structural Composite Lumber (LVL,PSL and LSL)
** Wood species identified typically have average specific gravity similar to the values shown
on this table.
All design values based on 1
1
⁄
2
" side member thickness and penetration into main member as
follows; HeadLok 2", Nails 10x diameter, Lags 8x diameter. Design values may be subject to
adjustment factors (section 10.3 in NDS) based on conditions existing during installation as
well as those expected during service life.
The lag screw and nail design values included in these tables are compiled directly from the 2001
National Design Specification for Wood Construction (2001 NDS). The FastenMaster HeadLok
design value calculations are based on independent lab testing as outlined in ICC Acceptance
Criteria AC233. All values have been reviewed and certified by a professional engineer.
The Professional Engineer (PE) is responsible for designing all connections, which include the
number and location of all fasteners to meet the national and local code requirements. All
minimum end and edge spacing distances should be 3" and 1
3
⁄
4
" respectively. Predrilling is
recommended on spacing closer than this to avoid splitting.
Note: Photographs showing HeadLok usage should not be used as a reference for fastening patterns.
For additional engineering data and technical assistance, please contact FastenMaster Technical
Support at 1
.
800
.
518
.
3569.
Specific FastenMaster
Nails Lags
**
Gravity** HeadLok
10D 16D 20D
1
⁄
4
"
3
⁄
8
"
Red Oak 0.67 299
154 184 222 140 160
Southern Pine 0.55
257 128 154 185 120 140
Doug. Fir-L, SCL* 0.50 240
118 141 170 110
130
Doug. Fir-S 0.46
226 109 131 157 100 120
Hem. Fir 0.43 215 102 122 147 100
120
E. Spruce, W. Cedar 0.36
189 87 104 126 90
100
Lateral Design Values (in pounds per Fastener) for single shear connections loaded perpendicular to grain
Wood
OMG, INC., 153 BOWLES ROAD, AGAWAM, MA 01001
800
.
518
.
3569 WWW.FASTENMASTER.COM
FastenMaster
®
, Spider Drive™ and HeadLok are trademarks of OMG, Inc.
Part Number Screw Length Quantity per Pack Driver Bits
FMHLGM278-50 2
7
⁄
8
" 50 3
FMHLGM334-50 3
3
⁄
4
" 50 3
FMHLGM412-50 4
1
⁄
2
" 50 3
FMHLGM005-50 5" 50 3
FMHLGM006-50 6" 50 3
FMHLGM278-500 2
7
⁄
8
" 500 5
FMHLGM334-250 3
3
⁄
4
" 250 5
FMHLGM412-250 4
1
⁄
2
" 250 5
FMHLGM005-250 5" 250 5
FMHLGM512-250 5
1
⁄
2
" 250 5
FMHLGM006-250 6" 250 5
FMHLGM612-250 6
1
⁄
2
" 250 5
FMHLGM007-250 7" 250 5
FMHLGM712-250 7
1
⁄
2
" 250 5
FMHLGM008-250 8" 250 5
FMHLGM812-250 8
1
⁄
2
" 250 5
FMHLGM009-250 9" 250 5
FMHLGM912-250 9
1
⁄
2
" 250 5
FMHLGM010-250 10" 250 5
FMHLGM011-250 11" 250 5
FMHLGM012-250 12" 250 5
FMHLGM013-250 13" 250 5
FMHLGM014-250 14" 250 5
FMHLGM015-250 15" 250 5
FMHLGM016-250 16" 250 5
FMHLGM018-250 18" 250 5
FMSPIDER3-2PK Driver Bit for HeadLok w/Spider Drive 2
FM07002-3M-AML