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Strong Products From a Strong Company

  • Self-drilling screws that are designed for general construction applications.
  • Drill points are designed to penetrate a wide variety of metal thicknesses from thin sheet meal to 0.250″.
  • Applications include HVAC, roof deck to steel framing, and roof clips to steel framing.
  • #10 and #14 HWH are available with or without a bonded sealing washer. The #12 HWH is available only without a sealing washer. The #12 MAXX® cupped head is available for applications requiring a washer.
  • PULLOUT & PULLOVER VALUES ARE DETERMINED IN THE ST FASTENING SYSTEMS ENGINEERING LABORATORY USING STEEL PANELS/FRAMING & WOOD DENSITIES WHOSE STRUCTURAL PROPERTIES ARE FOUND IN PRESENT DAY PRODUCTS.


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SIZE CARTON QTY. WEIGHT/M
8-18 X 1/2" 10000 3.6
8-18 X 5/8"w/Nibbs 10000 4.0
10-16 X 5/8" 5000 5.7
10-16 X 3/4" 2500 6.3
10-16 X 1" 2500 7.6
12-14 X 3/4" 2500 8.4
12-14 X 1" 2500 10.0
12-14 X 1 1/4" 2500 11.8
12-14 X 1 1/2" 2000 13.3
12-14 X 2" 2000 16.7
12-14 X 2 1/2 1500 21.4
12-14 X 3" 1000 25.0
14-14 X 7/8" STITCH 2500 8.8
14-14 X 3/4" 2500 12.5
1/4-14 X 1" 2500 15.2
1/4-14 X 1 1/4" 2000 17.5
1/4-14 X 1 1/2" 1500 19.6
1/4-14 X 2" 1000 23.8
1/4-14 X 2 1/2" 1000 30.0
1/4-14 X 3" 1000 33.2
1/4-14 X 4" 500 41.9
1/4-14 X 5" 500 50.7
1/4-14 X 6" 250 53.0

  #1/4-14 (3/8" AF) #12-14 (5/16" AF) #1/4-14 (5/16" AF)
HEAD STYLE 1/4" HWH 5/16" HWH 3/8" HWH
POINT DIAMETER .216/.210 .180/.175 .216/.210
MAJOR DIAMETER .246/.240 .215/.209 .246/.240
MINOR DIAMETER .192/.185 .164/.157 .192/.185
WASHER FACE DIAMETER .520/.480 .432/.398 .432/.398
HEAD ACROSS FLATS NOM .375" NOM .375" NOM .375"
NOM.TENSILE STRENGTH 3697 LBS. 2900 LBS. 3697 LBS.
MIN. TORSIONAL STRENGTH 150 IN-LBS. 92 IN-LBS. 150 IN-LBS.
NOM. SHEAR STRENGTH 2682 LBS. 1962 LBS. 2682 LBS.

SUBSTRATE GAUGE THICKNESS VALUE
HRS Primed Only #1/4-14(3/8” AF) 16 .065 986
HRS Primed Only #1/4-14(3/8” AF) 14 .070 1070
HRS Primed Only #1/4-14(3/8” AF) 12 .106 2003
HRS Primed Only #12-14(5/16” AF) 16 .065 927
HRS Primed Only #12-14(5/16” AF) 14 .070 958
HRS Primed Only #12-14(5/16” AF) 12 .106 1678
AZ55 Galvalume #1/4-14(3/8” AF) 22 .031 489
AZ55 Galvalume #1/4-14(5/16” AF) 18 .047 1038
AZ55 Galvalume #1/4-14(5/16” AF) 22 .031 418
AZ55 Galvalume #1/4-14(5/16” AF) 24 .024 378
AZ55 Galvalume #1/4-14(5/16” AF) 26 .019 342
G-90 Galvanized #1/4-14 (3/8” AF) 18 .047 868
G-90 Galvanized #1/4-14 (3/8” AF) 16 .060 890
G-90 Galvanized #1/4-14 (3/8” AF) 14 .072 1107
G-90 Galvanized #1/4-14 (3/8” AF) 12 .101 1327
G-90 Galvanized #12-14 (5/16” AF) 18 .047 729
G-90 Galvanized #12-14 (5/16” AF) 16 .060 787
G-90 Galvanized #12-14 (5/16” AF) 14 .072 1041
G-90 Galvanized #12-14 (5/16” AF) 12 .101 1372
G-90 Galvanized #1/4-14 (5/16” AF) 20 .038 620

SUBSTRATE GAUGE THICKNESS VALUE
#1/4-14 (3/8” AF) BONDED WASHER (16mm) AZ55 Galvalume 26 .019 1001
#1/4-14 (3/8” AF) BONDED WASHER (16mm) AZ55 Galvalume 24 .024 1206
#1/4-14 (3/8” AF) BONDED WASHER (16mm) AZ55 Galvalume 22 .032 1649
#1/4-14 (3/8” AF) ( .480/.520 HWH DIA.) AZ55 Galvalume 26 .019 878
#1/4-14 (3/8” AF) ( .480/.520 HWH DIA.) AZ55 Galvalume 24 .024 1160
#1/4-14 (3/8” AF) ( .480/.520 HWH DIA.) AZ55 Galvalume 22 .032 1503
#12-14 (5/16” AF) BONDED WASHER (14mm) AZ55 Galvalume 26 .019 780
#12-14 (5/16” AF) BONDED WASHER (14mm) AZ55 Galvalume 24 .024 1078
#12-14 (5/16” AF) BONDED WASHER (14mm) AZ55 Galvalume 22 .032 1355
#12-14 (5/16” AF) BONDED WASHER (14mm) G-90 GALVANIZED 20 .038 1608
#12-14 (5/16” AF) (.392/.432 HWH DIA.) AZ55 Galvalume 26 .019 722
#12-14 (5/16” AF) (.392/.432 HWH DIA.) AZ55 Galvalume 24 .024 1046
#12-14 (5/16” AF) (.392/.432 HWH DIA.) AZ55 Galvalume 22 .032 1197
#12-14 (5/16” AF) (.392/.432 HWH DIA.) G-90 GALVANIZED 20 .038 1419
#1/4-14 (5/16” AF)
STITCH BONDED WASHER (14mm) AZ55 Galvalume
26 .019 892
#1/4-14 (5/16” AF)
STITCH BONDED WASHER (14mm) AZ55 Galvalume
24 .024 1076
#1/4-14 (5/16” AF)
STITCH BONDED WASHER (14mm) AZ55 Galvalume
22 .032 1243
#1/4-14 (5/16” AF)
STITCH BONDED WASHER (14mm) G-90 GALVANIZED
20 .038 1916
#1/4-14 (5/16” AF)
STITCH (.398/.432 HWH DIA.) AZ55 Galvalume
26 .019 722
#1/4-14 (5/16” AF)
STITCH (.398/.432 HWH DIA.) AZ55 Galvalume
24 .024 990
#1/4-14 (5/16” AF)
STITCH (.398/.432 HWH DIA.) AZ55 Galvalume
22 .032 1088
#1/4-14 (5/16” AF)
STITCH (.398/.432 HWH DIA.) G-90 GALVANIZED
20 .038 1825

Purlin Applications

Purlin Applications

Purlin Screw

Purlin Screw

Cupped HWH head design improves Pull over strength versus standard HWH & Bonded Washer. ST Fastening Systems sockets are designed to allow for the added thickness of the powder coat.

Cupped HWH head design improves Pull over strength versus standard HWH & Bonded Washer. ST Fastening Systems sockets are designed to allow for the added thickness of the powder coat.

Drill point is designed to penetrate steel quickly with no

Drill point is designed to penetrate steel quickly with no "point walking".


Notes:

  1. HRS (Hot Rolled Steel)
  2. All strength values shown are ultimate values, express in LBS. Apply an appropriate safety factor to obtain design limits.


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