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ASME B18.6.3-2024 Machine Screws, Tapping Screws, and Metallic Drive Screws (Inch Series), 2024
- CONTENTS
- FOREWORD
- ASME B18 COMMITTEE ROSTER
- CORRESPONDENCE WITH THE B18 COMMITTEE
- ASME B18.6.3-2024 SUMMARY OF CHANGES
- 1 INTRODUCTORY NOTES [Go to Page]
- 1.1 Scope
- 1.2 Dimensions
- 1.3 Options
- 1.4 Responsibility for Modification
- 1.5 Terminology
- 1.6 Comparison With ISO
- 1.7 Referenced Standards
- 1.8 Inspection and Quality Assurance
- 2 GENERAL DATA FOR MACHINE SCREW AND TAPPING SCREW HEADS [Go to Page]
- 2.1 Heads
- 2.2 Screw Head Types
- 3 GENERAL DATA FOR MACHINE SCREWS [Go to Page]
- 3.1 Machine Screw Threads
- 3.2 Machine Screw Length of Thread
- 3.3 Machine Screw Length Measurement
- 3.4 Machine Screw Tolerance on Length
- 3.5 Machine Screw Diameter of Body
- 3.6 Machine Screw Points
- 3.7 Machine Screw Straightness
- 3.8 Machine Screw Material
- 3.9 Machine Screw Finish
- 3.10 Machine Screw Workmanship
- 3.11 Machine Screw Designation
- 4 GENERAL DATA FOR TAPPING SCREWS [Go to Page]
- 4.1 Tapping Screw Types and Application
- 4.2 Threads and Points
- 4.3 Tapping Screw Length of Thread
- 4.4 Tapping Screw Diameter of Body
- 4.5 Tapping Screw Length
- 4.6 Tapping Screw Tolerance on Length
- 4.7 Tapping Screw Straightness
- 4.8 Tapping Screw Materials
- 4.9 Tapping Screw Finish
- 4.10 Tapping Screw Workmanship
- 4.11 Performance Tests
- 4.12 Tapping Screw Designation
- 4.13 Tapping Screw Assembly Considerations
- 5 GENERAL DATA FOR METALLIC DRIVE SCREWS [Go to Page]
- 5.1 Drive Screw Threads
- 5.2 Drive Screw Length of Thread
- 5.3 Drive Screw Points
- 5.4 Drive Screw Tolerance on Length
- 5.5 Drive Screw Material
- 5.6 Test Requirements
- 5.7 Drive Screw Designation
- Figures [Go to Page]
- Figure 4.3.1-1 Types A, AB, B, BF, BP, and BT
- Figure 4.3.2-1 Types C, D, F, G, T, and TRS
- Figure 4.11.3-1 Typical Torsional Strength Test Fixture
- Figure I-1 Protrusion Gage
- Figure II-1 Typical Gaging Fixture
- Figure III-1-1 Penetration Gage for Types I, IA, and III Recesses
- Figure IV-1 Wobble Gaging Fixture
- Figure D-1 Drilled Hole
- Figure D-2 Cored Hole
- Figure D-3 Punched Hole
- Figure D-4 Hand-Pierced Hole
- Figure D-5 Type I Extruded Hole
- Figure D-6 Type II Extruded Hole
- Tables [Go to Page]
- Table 2.2.1-1 Dimensions of Slotted Flat Countersunk Head Screws
- Table 2.2.1-2 Recess Dimensions for Flat Countersunk Head Screws
- Table 2.2.1-3 Dimensions of Slotted 100-deg Flat Countersunk Head Screws (Machine Screws Only)
- Table 2.2.1-4 Recess Dimensions for 100-deg Flat Countersunk Head Screws (Machine Screws Only)
- Table 2.2.1-5 Dimensions of Slotted Close Tolerance 100-deg Flat Countersunk Head Screws (Machine Screws Only)
- Table 2.2.1-6 Recess Dimensions for Close Tolerance 100-deg Flat Countersunk Head Screws (Machine Screws Only)
- Table 2.2.2-1 Dimensions of Slotted Oval Countersunk Head Screws
- Table 2.2.2-2 Recess Dimensions of Oval Countersunk Head Screws
- Table 2.2.3-1 Dimensions of Slotted Undercut 82-deg Flat Countersunk Head Screws
- Table 2.2.3-2 Recess Dimensions for Undercut 82-deg Flat Countersunk Head Screws
- Table 2.2.3-3 Dimensions of Slotted Undercut Oval Countersunk Head Screws
- Table 2.2.3-4 Recess Dimensions for Undercut Oval 82-deg Countersunk Head Screws
- Table 2.2.4-1 Dimensions of Flat Countersunk Trim Head Screws
- Table 2.2.4-2 Recess Dimensions for Flat Countersunk Trim Head Screws
- Table 2.2.4-3 Dimensions of Oval 82-deg Countersunk Trim Head Screws
- Table 2.2.4-4 Recess Dimensions for Oval 82-deg Countersunk Trim Head Screws
- Table 2.2.5-1 Head Dimensions for Slotted Pan Head Screws
- Table 2.2.5-2 Dimensions of Type I Cross Recessed Pan Head Screws
- Table 2.2.5-3 Recess Dimensions for Pan Head Screws (Types IA, III, and VI)
- Table 2.2.5-4 Recess Dimensions for Combination Slotted-Pan Head Screws
- Table 2.2.6-1 Dimensions of Slotted Fillister Head Screws
- Table 2.2.6-2 Recess Dimensions for Fillister Head Screws
- Table 2.2.6-3 Dimensions of Slotted Drilled Fillister Head Screws (Machine Screws Only)
- Table 2.2.7-1 Dimensions of Slotted Truss Head Screws
- Table 2.2.7-2 Recess Dimensions for Truss Head Screws
- Table 2.2.7-3 Dimensions of Combination Slotted Truss Head Screws
- Table 2.2.8-1 Dimensions of Slotted Binding Head Screws (Machine Screws Only)
- Table 2.2.8-2 Recess Dimensions for Binding Head Screws (Machine Screws Only)
- Table 2.2.9-1 Dimensions of Plain (Unslotted) and Slotted Regular and Large Hex Head Screws
- Table 2.2.9-2 Recess Dimensions for Indented Regular and Large Hex Head Screws
- Table 2.2.9-3 Recess Dimensions for Type I Nonindented Regular and Large Hex Head Screws
- Table 2.2.10-1 Dimensions of Plain and Slotted Hex Washer Head Screws
- Table 2.2.10-2 Recess Dimensions for Indented Hex Washer Head Screws
- Table 2.2.10-3 Recess Dimensions for Combination Slotted Type I Indented Hex Washer Head Screws
- Table 2.2.11-1 Dimensions of Slotted Round Head Screws
- Table 2.2.11-2 Recess Dimensions for Round Head Screws
- Table 2.2.11-3 Recess Dimensions for Combination Slotted Round Head Screws
- Table 2.2.12-1 Dimensions of Slotted Round Washer Head Screws
- Table 2.2.12-2 Recess Dimensions for Round Washer Head Screws
- Table 4.1.1.1-1 Dimensions of Threads and Points for Types AB and ABR Thread-Forming Tapping Screws
- Table 4.1.1.2-1 Dimensions of Threads and Points for Types B and BP Thread-Forming Tapping Screws
- Table 4.1.1.4-1 Dimensions of Threads and Points for Type A Thread-Forming Tapping Screws
- Table 4.1.2.1-1 Dimensions of Threads and Points for Types BF and BT Thread-Cutting Tapping Screws
- Table 4.1.2.2-1 Dimensions of Threads and Points for Types D, F, G, and T Thread-Cutting Tapping Screws
- Table 4.1.3-1 Dimensions of Type TRS Tapping Screws
- Table 4.3.1-1 Thread Lengths for Types A, AB, B, BF, BP, and BT Tapping Screws
- Table 4.3.2-1 Thread Lengths for Types C, D, F, G, T, and TRS Tapping Screws
- Table 4.11.1-1 Standard Test-Plate Thickness and Hole Sizes for Drive-Test Inspection of Tapping Screws
- Table 4.11.2-1 Maximum Drive Torque for Type TRS Tapping Screws
- Table 4.11.3-1 Torsional Strength Requirements for Tapping Screws
- Table 5-1 Dimensions of Round Head Type U Metallic Drive Screws
- Table III-1-1 Dimensions of Gage Heads for Types I, IA, and III Recesses
- Table III-1-2 Dimensions of Gage Heads for Type I Recess
- Table III-1-3 Dimensions of Gage Points for Type IA Recess
- Table III-1-4 Dimensions of Type III Square Penetration Gage Points
- Table III-1-5 Dimensions of Type III Square Fit Gage Points
- Table IV-1 Gage Body Diameters
- Table IV-2 Gaging Limits for Types I, IA, and III Recesses
- Table V-1 Dimensions for No. 0000, No. 000, and No. 00 Thread Sizes
- Table VI-1 Dimensions of Threads and Points for Type C Thread-Forming Tapping Screws
- Table VII-2-1 Dimensions for Type VI Recess Gage Elements
- Table A-1 Dimensions of Header Points for Machine Screws Before Threading
- Table B-1 Constants for Determining Maximum Effective Design Grip Length on Types AB, A, and BP Tapping Screws
- Table C-1 Flat Countersunk Head Screws
- Table C-2 Undercut Flat Countersunk Head Screws
- Table C-3 100-deg Flat Countersunk Head Screws
- Table C-4 Close Tolerance 100-deg Flat Countersunk Head Screws
- Table C-5 Oval Countersunk Head Screws
- Table C-6 Undercut Oval Countersunk Head Screws
- Table C-7 Pan Head Screws
- Table C-8 Truss Head Screws
- Table C-9 Fillister Head Screws
- Table C-10 Drilled Fillister Head Screws
- Table C-11 Binding Head Screws
- Table C-12 Round Head Screws
- Table C-13 Flat and Oval Countersunk Trim Head Screws
- Table C-14 Slot Width in Slotted Head Screws
- Table C-15 Machine Screw Nuts
- Table D-1 Approximate Hole Sizes for Steel Type AB Thread-Forming Tapping Screws
- Table D-2 Approximate Hole Sizes for Steel Types B and BP Thread-Forming Tapping Screws
- Table D-3 Approximate Hole Sizes for Steel Types BF and BT Thread-Cutting Tapping Screws
- Table D-4 Approximate Hole Sizes for Steel Types D, F, G, and T Thread-Cutting Tapping Screws
- Table D-5 Approximate Hole Sizes for Steel Type A Thread-Forming Tapping Screws
- Table D-6 Approximate Hole Sizes in Steel Sheet Metals for Steel Type C Thread-Forming Tapping Screws
- Table D-7 Approximate Hole Sizes for Thread Rolling Screws
- Table E-1 Wrench Openings for Hex Head Screws, and Square and Hex Nuts
- MANDATORY APPENDICES [Go to Page]
- MANDATORY APPENDIX I PROTRUSION GAGING OF FLAT COUNTERSUNK HEADS
- MANDATORY APPENDIX II ACROSS-CORNERS GAGING OF HEX HEADS
- MANDATORY APPENDIX III GAGING OF RECESSED HEADS, TYPES I, IA, AND III [Go to Page]
- III-I PENETRATION GAGING
- III-2 FIT GAGING ON TYPE III RECESSES
- MANDATORY APPENDIX IV WOBBLE GAGING OF RECESSED HEADS
- MANDATORY APPENDIX V DIMENSIONS FOR NO. 0000, NO. 000, AND NO. 00 THREAD SIZES
- MANDATORY APPENDIX VI DIMENSIONS OF TYPE C TAPPING SCREWS
- MANDATORY APPENDIX VII TYPE VI RECESS GAGE REQUIREMENTS [Go to Page]
- VII-1 SCOPE
- VII-2 DEFINITION
- VII-3 GAGE TYPE
- VII-4 INSPECTION
- VII-5 RECESS ACCEPTABILITY
- VII-6 RECESS UNACCEPTABILITY
- NONMANDATORY APPENDICES [Go to Page]
- NONMANDATORY APPENDIX A DIMENSIONS OF HEADER POINTS FOR MACHINE SCREWS BEFORE THREADING
- NONMANDATORY APPENDIX B DETERMINATION OF MAXIMUM EFFECTIVE DESIGN GRIP LENGTHS
- NONMANDATORY APPENDIX C FORMULAS FOR DIMENSIONS
- NONMANDATORY APPENDIX D APPROXIMATE HOLE SIZES FOR TAPPING SCREWS
- NONMANDATORY APPENDIX E WRENCH OPENINGS FOR HEX HEAD SCREWS, AND SQUARE AND HEX NUTS [Go to Page]
