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  • #12 diameter screw has ¼’ HWH. Thread design has excellent holding strength in wood.
  • #1 drill point will penetrate steel thickness up to 18 gauge.
  • Black e-coat corrosion resistant coating is standard on all screws.
  • G-90 bonded sealing washer is assembled to the fastener.
  • Applications include retrofit & metal panels through rigid insulation to wood.
  • Screws are available in all standard ST Fastening Systems colors (wet-paint process).


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SIZE CARTON QTY. WEIGHT/M
12 x 3 3/4” 1000 26.5
12 x 4 1/2” 1000 30.7
12 x 5” 1000 33.4
12 x 6” 500 39.0
12 x 7” 500 43.7
12 x 8” 500 49.7
  INSULDRILL
HEAD STYLE 1/4" HWH
POINT DIAMETER SELF-DRILL
MAJOR DIAMETER .215 NOM.
MINOR DIAMETER .130 NOM.
WASHER/HEAD DIAMETER .400 NOM.
HEAD ACROSS FLATS .250 NOM.
NOM. TENSILE STRENGTH *1723 LBS.
MIN. TORSIONAL STRENGTH 125 IN-LBS.
NOM. SHEAR STRENGTH 1324 LBS.
SUBSTRATE GAUGE THICKNESS VALUE
# 12 Diameter GALVANIZED 18 0.047 653
# 12 Diameter GALVANIZED 20 0.038 489
# 12 Diameter GALVANIZED 22 0.031 406
# 12 Diameter GALVANIZED 24 0.024 319
# 12 Diameter GALVANIZED 26 0.019 263
# 12 Diameter 3/4 PLY N/A FULL 795
# 12 Diameter 5/8 PLY N/A FULL 564
# 12 Diameter 1/2 PLY N/A FULL 457
# 12 Diameter7/16 OSB N/A FULL 177
# 12 Diameter 2x Y.PINE N/A FULL 1605
# 12 Diameter 2x Y.PINE N/A 1" 976
SUBSTRATE GAUGE THICKNESS VALUE
AZ55 Galvalume BONDED WASHER ( .472” Dia) (12mm) 29 .015 671
AZ55 Galvalume BONDED WASHER ( .472” Dia) (12mm) 26 .019 845

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