| Fully Threaded Hex Tap Bolts: Head & Thread Dimensions (ASME B18.2.1-1996) | ||||||||
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Nominal or Basic Product Diameter Click on size to search products |
Width Across Flats (F) |
Width Across Corners (G) | Head Height (H) | |||||
| Basic | Max | Min | Max | Min | Basic | Max | Min | |
| 1/4 | 7/16 | .438 | .428 | .505 | .488 | 5/32 | .163 | .150 |
| 5/16 | 1/2 | .500 | .489 | .577 | .557 | 13/64 | .211 | .195 |
| 3/8 | 9/16 | .562 | .551 | .650 | .628 | 15/64 | .243 | .226 |
| 7/16 | 5/8 | .625 | .612 | .722 | .698 | 9/32 | .291 | .272 |
| 1/2 | 3/4 | .750 | .736 | .866 | .840 | 5/16 | .323 | .302 |
| 9/16 | 13/16 | .812 | .798 | .938 | .910 | 23/64 | .371 | .348 |
| 5/8 | 15/16 | .938 | .922 | 1.083 | 1.051 | 25/64 | .403 | .378 |
| 3/4 | 1-1/8 | 1.125 | 1.100 | 1.299 | 1.254 | 15/32 | .483 | .455 |
| 7/8 | 1-5/16 | 1.312 | 1.269 | 1.516 | 1.447 | 37/64 | .604 | .531 |
| 1 | 1-1/2 | 1.500 | 1.450 | 1.732 | 1.653 | 43/64 | .700 | .591 |
| 1-1/4 | 1-7/8 | 1.875 | 1.812 | 2.165 | 2.066 | 27/32 | .876 | .749 |
* Click on the nominal size to find products.
| Fully Threaded Hex Tap Bolts: Tolerance on Length | |||||||
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| Nominal Screw Size |
Nominal Screw Length | ||||||
| Up to 1" | Over 1" - 2-1/2" | Over 2-1/2" - 4" | Over 4" - 6" | Longer than 6" | |||
| 1/4 - 3/8 | -.03 | -.04 | -.06 | -.10 | -.18 | ||
| 7/16 & 1/2 | -.03 | -.06 | -.08 | -.10 | -.18 | ||
| 9/16 - 3/4 | -.03 | -.08 | -.10 | -.10 | -.18 | ||
| 7/8 and 1 | - | -.10 | -.14 | -.16 | -.20 | ||
| 1-1/4 | - | -.12 | -.16 | -.18 | -.22 | ||
| Fully Threaded Hex Tap Bolts: Performance & Mechanical Stats (Grades 2, 5 & 8) | ||||
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| Description | A low carbon, hex tap bolt with a machined point, which is fully threaded. | A medium carbon steel hex tap bolt with a machined point, which is fully threaded. | A medium carbon alloy steel steel, heat treated, hex tap bolt with a machined point, which is fully threaded. | |
| Applications | Used in drilled and tapped holes which are threaded full length. | Used to mount motors to machinery - also used in automotive and truck repair. | Used in automotive and and fleet industries where greater tensile strength is required than can be met by a Grade-5 Hex Tap Bolt. | |
| Material |
AISI 1006-1025 or equivalent | AISI 1030-1541 or equivalent medium carbon steel. Alloy 4037 is acceptable, | Medium carbon alloy steel. Diameters 1/4-7/16" AISI 1541 steel is acceptable. | |
| Heat Treatment | Heat treated, oil or water quenched, tempered at 800 Deg (F) min. | Heat treated, oil quenched, tempered at 800 Deg (F) min. | ||
| Core Hardness | Rockwell B80-B100 |
Rockwell C25-C34 |
Rockwell C33-C39 | |
| Surface Hardness |
Rockwell 30N54 max |
Rockwell 30N58.6 max | ||
| Proof Load |
55,000 psi |
85,000 psi |
120,000 psi | |
| Yield Strength |
57,000 psi min.
|
92,000 psi min. | 130,000 psi min | |
| Tensile Strength |
74,000 psi min. |
120,000 psi min
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150,000 psi min | |
| Elongation | 18% min | 14% min | 12% min | |
| Reduction of Area | 35% min | 35% min | 35% min | |
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