Features

  • 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.

 

Edit
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 STYLE1/4" 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 FLATSNOM .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.
SUBSTRATEGAUGETHICKNESSVALUE
HRS Primed Only #1/4-14(3/8” AF)16.065986
HRS Primed Only #1/4-14(3/8” AF)14.0701070
HRS Primed Only #1/4-14(3/8” AF)12.1062003
HRS Primed Only #12-14(5/16” AF)16.065927
HRS Primed Only #12-14(5/16” AF)14.070958
HRS Primed Only #12-14(5/16” AF)12.1061678
AZ55 Galvalume #1/4-14(3/8” AF)22.031489
AZ55 Galvalume #1/4-14(5/16” AF)18.0471038
AZ55 Galvalume #1/4-14(5/16” AF)22.031418
AZ55 Galvalume #1/4-14(5/16” AF)24.024378
AZ55 Galvalume #1/4-14(5/16” AF)26.019342
G-90 Galvanized #1/4-14 (3/8” AF)18.047868
G-90 Galvanized #1/4-14 (3/8” AF)16.060890
G-90 Galvanized #1/4-14 (3/8” AF)14.0721107
G-90 Galvanized #1/4-14 (3/8” AF)12.1011327
G-90 Galvanized #12-14 (5/16” AF)18.047729
G-90 Galvanized #12-14 (5/16” AF)16.060787
G-90 Galvanized #12-14 (5/16” AF)14.0721041
G-90 Galvanized #12-14 (5/16” AF)12.1011372
G-90 Galvanized #1/4-14 (5/16” AF)20.038620
SUBSTRATEGAUGETHICKNESSVALUE
#1/4-14 (3/8” AF) BONDED WASHER (16mm) AZ55 Galvalume26.0191001
#1/4-14 (3/8” AF) BONDED WASHER (16mm) AZ55 Galvalume24.0241206
#1/4-14 (3/8” AF) BONDED WASHER (16mm) AZ55 Galvalume22.0321649
#1/4-14 (3/8” AF) ( .480/.520 HWH DIA.) AZ55 Galvalume26.019878
#1/4-14 (3/8” AF) ( .480/.520 HWH DIA.) AZ55 Galvalume24.0241160
#1/4-14 (3/8” AF) ( .480/.520 HWH DIA.) AZ55 Galvalume22.0321503
#12-14 (5/16” AF) BONDED WASHER (14mm) AZ55 Galvalume 26.019780
#12-14 (5/16” AF) BONDED WASHER (14mm) AZ55 Galvalume 24.0241078
#12-14 (5/16” AF) BONDED WASHER (14mm) AZ55 Galvalume 22.0321355
#12-14 (5/16” AF) BONDED WASHER (14mm) G-90 GALVANIZED20.0381608
#12-14 (5/16” AF) (.392/.432 HWH DIA.) AZ55 Galvalume 26.019722
#12-14 (5/16” AF) (.392/.432 HWH DIA.) AZ55 Galvalume 24.0241046
#12-14 (5/16” AF) (.392/.432 HWH DIA.) AZ55 Galvalume 22.0321197
#12-14 (5/16” AF) (.392/.432 HWH DIA.) G-90 GALVANIZED 20.0381419
#1/4-14 (5/16” AF)
STITCH BONDED WASHER (14mm) AZ55 Galvalume
26.019892
#1/4-14 (5/16” AF)
STITCH BONDED WASHER (14mm) AZ55 Galvalume
24.0241076
#1/4-14 (5/16” AF)
STITCH BONDED WASHER (14mm) AZ55 Galvalume
22.0321243
#1/4-14 (5/16” AF)
STITCH BONDED WASHER (14mm) G-90 GALVANIZED
20.0381916
#1/4-14 (5/16” AF)
STITCH (.398/.432 HWH DIA.) AZ55 Galvalume
26.019722
#1/4-14 (5/16” AF)
STITCH (.398/.432 HWH DIA.) AZ55 Galvalume
24.024990
#1/4-14 (5/16” AF)
STITCH (.398/.432 HWH DIA.) AZ55 Galvalume
22.0321088
#1/4-14 (5/16” AF)
STITCH (.398/.432 HWH DIA.) G-90 GALVANIZED
20.0381825
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 "point walking".

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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