Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 493

Anchor Fastening Technical Guide , Edition 22

4.1.3 FEDERAL SPECIFICATIONS

Standard Title

A-A-1922A Shield , Expansion ( Caulking Anchors , Single Lead )

A-A-1923A Shield , Expansion ( Lag , Machine and Externally Threaded Wedge Bolt Anchors )

A-A-1924A Shield , Expansion ( Self Drilling Tubular Expansion Shell Bolt Anchors )

A-A-55615 Shield , Expansion ( Wood Screw and Lag Bolt Self-Threading Anchors )

A-A-55614 Shield , Expansion ( Non-drilling Expansion Anchors )

4.1.4 ANSI STANDARDS

Standard B18.2.2

Table 1 — Diameters

in .

Title

Nuts for General Applications : Machine Screw Nuts , Hex , Square , Hex Flange , and Coupling Nuts ( Inch Series )

B18.22.1 Plain Washers ( Inch Series )

B212.15 Carbide-Tipped Masonry Drills and Blanks for Carbide – Tipped Masonry Drills

Standard 61 Drinking Water System Components – Health Effects

4.2.1 METRIC CONVERSIONS AND EQUIVALENTS

The Metric Conversion Act of 1975 , as amended by the Omnibus Trade and Competitiveness Act of 1988 , establishes the SI or System International metric system as the preferred system of measurement in the United States . Many products are currently manufactured and supplied in SI or hard metric sizes such as anchor bolts of 10 mm , 12 mm , 26 mm , etc . diameter . Where the inch-pound system is given or used , soft metric conversion can sometimes be used . This is not the case when selecting a drill bit for installing mechanical anchors , where it is critical to only use the specified Imperial or Metric diameter bit . The soft conversion diameters for anchor bolts is given by Table 1 . Standard metric conversion factors commonly used for fastening products are given in Tables 2 and 3 .

Hard metric conversion mm

Use for soft metric mm

1 / 4 6.35 6 5 / 16 7.94 8 3 / 8 9.52 10 1 / 2 12.70 12 5 / 8 15.88 16 3 / 4 19.05 20 1 25.40 25

1-1 / 4 31.75 32

Table 2 — Imperial units to SI units To convert Into Multiply by

Table 3 — SI units to Imperial units

Anchor Fastening Technical Guide Edition 22 | 4.0 REFERENCE | 4.3 TECHNICAL REFERENCES Hilti , Inc . 1-800-879-8000 | en español 1-800-879-5000 | www . hilti . com | Hilti ( Canada ) Corporation | www . hilti . ca | 1-800-363-4458

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