Below is a comprehensive list of worldwide listed headed Screws dimension standards among ANSI, ASME, DIN, ISO, BS & Indian IS.
| Description | Standard | Measurement System |
|---|---|---|
| Square & Hex Head Screws | ANSI/ASME B18.2.1 | Inch Series |
| Hex Cap Screws | ANSI/ASME B18.2.3.1M | Metric |
| Formed Hex Screws | ANSI/ASME B18.2.3.2M | Metric |
| Heavy Hex Screws | ANSI/ASME B18.2.3.3M | Metric |
| Hex Flange Screws | ANSI/ASME B18.2.3.4M | Metric |
| Hex Lag Screws | ANSI/ASME B18.2.3.8M | Metric |
| Heavy Hex Flange Screws | ANSI/ASME B18.5.2.9M | Metric |
| Socket Cap, Shoulder, Set Screws with Hex & Spline Keys | ANSI/ASME B18.3 | Inch Series |
| Socket Head Cap Screws | ANSI/ASME B18.3.1M | Metric |
| Hex Socket Head Shoulder Screws | ANSI/ASME B18.3.3M | Metric |
| Hex Socket Button Head Cap Screws | ANSI/ASME B18.3.4M | Metric |
| Hex Socket Flat Countersunk Head Cap Screws | ANSI/ASME B18.3.5M | Metric |
| Socket Set Screws | ANSI/ASME B18.3.6M | Metric |
| Wood Screws | ANSI/ASME B18.6.1 | Inch Series |
| Slotted Head Cap Screws, Square Head Set Screws & Slotted Headless Set Screws | ANSI/ASME B18.6.2 | Inch Series |
| Machine Screws | ANSI/ASME B18.6.3 | Inch Series |
| Thread Forming & Thread Cutting Tapping Screws & Metallic Drive Screws | ANSI/ASME B18.6.4 | Inch Series |
| Thread Forming & Thread Cutting Tapping Screws | ANSI/ASME B18.6.5M | Metric |
| Machine Screws | ANSI/ASME B18.6.7M | Metric |
| Miniature Screws | ANSI/ASME B18.11 | |
| Slotted Cheese Head Machine Screws | DIN 84/ ISO 1207 | Metric |
| Raised Countersunk Head Wood Screws | DIN 95 | Metric |
| Slotted Round Head Wood Screws | DIN 96 | Metric |
| Slotted Countersunk Head Wood Screws | DIN 97 | Metric |
| Rectangular Wing Screws A | DIN 316 A | Metric |
| Rounded Wing Screws D | DIN 316 D | Metric |
| Slotted Set Screws With Flat Point | DIN 551 / ISO 4766 / UNI 4766 | Metric |
| Slotted Set Screws With Cone Point | DIN 553 / ISO 7434 / UNI 7434 | Metric |
| Hexagon Head Screws | DIN 558 | Metric |
| Hexagon Wood Screws | DIN 571 | Metric |
| Socket Head Cap Screws | DIN 912 / ISO 4762 / ASME B18.3.1M | Metric |
| Slotted Pan Head Screws With Small Head | DIN 920 | Metric |
| Slotted Pan Head Screw With Large Head | DIN 921 | Metric |
| Slotted Pan Head Screws With Small Head & Full Dog Point | DIN 922 | Metric |
| Slotted Pan Head Shoulder Screws | DIN 923 | Metric |
| Slotted Raised Countersunk Head Screws With Full Dog Point | DIN 924 | Metric |
| Hexagon Head Screws with Fine Threads | DIN 961 / ISO 8676 | Metric |
| Slotted Countersunk Head Screws | DIN 963 / ISO 2009 | Metric |
| Slotted Raised Countersunk Head Screws | DIN 964 / ISO 2010 | Metric |
| Philip Flat Head Countersunk Screws | DIN 965 / ISO 7046 | Metric |
| Hexagon Head Self Tapping Screws | ISO 1479 | Metric |
| Slotted Pan Head Tapping Screws | ISO 1481 | Metric |
| Slotted Countersunk Head Tapping Screws | ISO 1482 | Metric |
| Slotted Raised Countersunk Head Tapping Screws | ISO 1483 | Metric |
| Slotted Pan Head Screws | ISO 1580 | Metric |
| Hex Washer Head Thread Forming Screws With ISO Threads | ISO 15480 | Metric |
| Cross Recessed Countersunk Head Self | ISO 15482 | Metric |
| Drilling Screws Type P | ISO 15481 | Metric |
| Cross Recessed Pan Head Self Drilling Screws | ISO 2010 | Metric |
| Slotted Raised Countersunk Oval Head Screws | ISO 2342 | Metric |
| Slotted Headless Screws with Chamfered End | ISO 4017 | Metric |
| Hexagon Head Screws | ISO 4026 / DIN 913 | Metric |
| Hexagon Socket Set Screws with Flat Point | ISO 4027 / DIN 914 | Metric |
| Hexagon Socket Set Screws With Cone Point | ISO 4028 / DIN 915 | Metric |
| Hexagon Socket Set Screws With Full Dog Point | ISO 4029 | Metric |
| Hexagon Socket Set Screws With Cup Point | ISO 7045 | Metric |
| Cross Recessed Raised Cheese Head Screws | ISO 7046 | Metric |
| Cross Recessed Countersunk Flat Head Screws | ISO 7049 | Metric |
| Pan Head Tapping Screws with Cross Recess H & Z, Form C | ISO 7050 | Metric |
| Cross Recessed Countersunk Head Tapping Screws | ISO 7051 | Metric |
| Flat Countersunk Head Tapping Screws With Cross Recess | ISO 7380 | Metric |
| Hexagon Socket Button Head Screws | ISO 7380 FL | Metric |
| Hexagon Socket Button Head Screws With Flange | ISO 7380 TX | Metric |
| Hexagon Socket Button Head Screws With TORX | ISO 7435 | Metric |
| Slotted Set Screws with Pins | ISO 7436 / DIN 438 | Metric |
| Slotted Set Screws with Cup Point | ISO 8765 / DIN 960 / UNI 5783 | Metric |
| Partial Threaded Hex Cap Screws With Metric Fine Threads | IS 1363 Part 2 | Metric |
| Hexagon Head Screws | IS 1364 Part 2 | Metric |
| Hexagon Head Screws | IS 2269 | Metric |
| Hexagon Socket Head Cap Screws | IS 6760 | Metric |
| Slotted Countersunk Head Wood Screws | BS 3692 | Metric |
| ISO Metric Precision Hex Screws | BS 4183 | Metric |
| Machine Screws | BS 4190 | Metric |
| Hexagon Head Screws | BS 4168 | Metric |
| Hexagon Socket Shoulder Screws | BS 57 | BA |
| Slotted Mushroom Head Machine Screws | BS 57 | BA |
| Slotted Cheese Head Machine Screws | BS 57 | BA |
| Pozi Countersunk Head Machine Screw | BS 57 | BA |
| Slotted Countersunk Head Machine Screws | BS 57 | BA |
| Slotted Raised Countersunk Machine Screw | BS 57 | BA |
| Pozi Raised Countersunk Machine Screw | BS 57 | BA |
| Slotted Pan Head Machine Screw | BS 57 | BA |
| Hexagon Head Set Screws | BS 57 | BA |
| Pozi Mushroom Head Machine Screws | BS 57 | BA |
| Pozi Pan Head Machine Screws | BS 57 | BA |
| Slotted Round Head Machine Screws | BS 57 | BA |
| Slotted Mushroom Head Machine Screws | BS 450 | BSF / BSW Whitworth |
| Slotted Cheese Head Machine Screws | BS 450 | BSF / BSW Whitworth |
| Pozi Countersunk Head Machine Screws | BS 450 | BSF / BSW Whitworth |
| Slotted Countersunk Head Machine Screws | BS 450 | BSF / BSW Whitworth |
| Slotted Pan Head Machine Screws | BS 450 | BSF / BSW Whitworth |
| Slotted Raised Countersunk Machine Screws | BS 450 | BSF / BSW Whitworth |
| Pozi Raised Cheese Head Machine Screws | BS 450 | BSW Whitworth |
| Slotted Raised Cheese Head Machine Screws | BS 450 | BSF / BSW Whitworth |
| Pozi Raised Countersunk Machine Screws | BS 450 | BSW Whitworth |
| Pozi Raised Cheese Head Machine Screws | BS 450 | BSF |
| Pozi Raised Countersunk Machine Screws | BS 450 | BSF |
| Pozi Mushroom Head Machine Screws | BS 450 | BSF / BSW Whitworth |
| Pozi Pan Head Machine Screws | BS 450 | BSF / BSW Whitworth |
| Slotted Round Head Machine Screws | BS 450 | BSF / Whitworth |
| Hexagon Head Set Screws | BS 1083 | BSF / BSW Whitworth |
| Pozi Countersunk Twin Thread Wood Screws | BS 1210 | Metric |
| Pozi Countersunk Wood Screws | BS 1210 | Inch Series |
| Socket Head Cap Screws | BS 2470 | UNC/UNF |
| Socket Set Screws Cone Point | BS 2470 | BSF / BSW Whitworth |
| Socket Set Screws Cup Point | BS 2470 | BSF / BSW Whitworth |
| Socket Set Screws Dog Point | BS 2470 | BSF / BSW Whitworth |
| Socket Set Screws Flat Point | BS 2470 | BSF / BSW Whitworth |
| Socket Head Cap Screws | BS 2470 | BSF / BSW Whitworth |
| Socket Countersunk Screws | BS 2470 | BSF / BSW Whitworth |
| Hexagon Socket Shoulder Screws | BS 2470 | BSF / BSW Whitworth |
| Hexagon Socket Shoulder Screw | BS 4168 | Metric |
| Slotted Countersunk Head Self Tapping Screws | BS 4174 | Inch Series |
| Slotted Raised Countersunk Head Self Tapping Screws | BS 4174 | Inch Series |
| Hexagon Head Self Tapping Screws | BS 4174 | Inch Series |
| Pozi Countersunk Head Self Tapping Screws | BS 4174 | Inch Series |
| Pozi Pan Head Self Tapping Screws | BS 4174 | Inch Series |
| Slotted Pan Head Self Tapping Screws | BS 4174 | Inch Series |
| Round Hammer Drive Screws "U" | BS 4174 | Inch Series |