7/8-9 X 4 1/4 A307A Hex Bolt, Galvanized
7/8-9 X 4 1/4 A307A Hex Bolt, Galvanized
Item #: HHG20870425
Manufacturers:
Product Specification
| Length | 4 1/4 |
|---|---|
| Thread Length | 2.0000 |
| Grade | Grade A307 |
| Finish | Hot Dipped Galvanized |
| Weight | 0.921850 |
| Diameter | 7/8 |
Mechanical Properties
| Low Carbon Steel | Per ASTM A307-2014 | ||||
| Grade A | Diameter | Bolt or Stud Length | Tensile Strength | Elongation | Core Hardness (1) |
| Min psi | Min % | Rockwell | |||
| 1/4 thru 4" | Less than 3 X dia (2) | 60,000 | 18 | B69 to B100 | |
| 3 X dia and longer | 60,000 | 18 | B100 | ||
- 1. As measured anywhere on the surface or through the cross section.
- 2. Also bolts with drilled or undersized heads. These sizes and bolts with modified heads shall meet the minimum and maximum hardness as hardness is the only requirement.
Governing Standards
| ASTM A307 | Covers the mechanical and material requirements for inch series fasteners in diameters from 1/4″ through 4″, made of carbon steel having a minimum tensile strength of 60,000 psi. |
| ASME B18.2.1 | Covers the complete general and dimensional data for multiple types of inch series square and hex bolts and screws. |
| ASME B1.1 UNC & UNF Class 2A | Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads. |
A307 Material Marking
Chemical Properties
| Per ASTM A307-2014 | ||||
| Grade A | Carbon | Manganese | Phosphorus | Sulfur |
| % by heat analysis | % by heat analysis | % by heat analysis | % by heat analysis | |
| 0.29 | 1.20 | 0.04 | 0.15 | |
Dimensional Specifications
| Per ASME B18.2.1-2012 | |||||||||||||||
| Nominal Diameter | UNC | UNF | E | F | G | H | LT | ||||||||
| Body Diameter | Width Across Flats | Width Across Corners | Head Height | Thread Length | |||||||||||
| Max | Min | Basic | Max | Min | Max | Min | Basic | Max | Min | Lengths up to 6" | Lengths > 6" | ||||
| 1/4 | 0.2500 | 20 | 28 | 0.2500 | 0.2405 | 7/16 | 0.4380 | 0.4280 | 0.5050 | 0.4880 | 5/32 | 0.1630 | 0.1500 | 0.7500 | 1.0000 |
| 5/16 | 0.3125 | 18 | 24 | 0.3125 | 0.3065 | 1/2 | 0.5000 | 0.4890 | 0.5770 | 0.5570 | 13/64 | 0.2110 | 0.1950 | 0.8750 | 1.1250 |
| 3/8 | 0.3750 | 16 | 24 | 0.3750 | 0.3690 | 9/16 | 0.5620 | 0.5510 | 0.6500 | 0.6280 | 15/64 | 0.2430 | 0.2260 | 1.0000 | 1.2500 |
| 7/16 | 0.4375 | 14 | 20 | 0.4375 | 0.4305 | 5/8 | 0.6250 | 0.6120 | 0.7220 | 0.6980 | 9/32 | 0.2910 | 0.2720 | 1.1250 | 1.3750 |
| 1/2 | 0.5000 | 13 | 20 | 0.5000 | 0.4930 | 3/4 | 0.7500 | 0.7360 | 0.8660 | 0.8400 | 5/16 | 0.3230 | 0.3020 | 1.2500 | 1.5000 |
| 9/16 | 0.5625 | 12 | 18 | 0.5625 | 0.5545 | 13/16 | 0.8120 | 0.7980 | 0.9380 | 0.9100 | 23/64 | 0.3710 | 0.3480 | 1.3750 | 1.6250 |
| 5/8 | 0.6250 | 11 | 18 | 0.6250 | 0.6170 | 15/16 | 0.9380 | 0.9220 | 1.0830 | 1.0510 | 25/64 | 0.4030 | 0.3780 | 1.5000 | 1.7500 |
| 3/4 | 0.7500 | 10 | 16 | 0.7500 | 0.7410 | 1 1/8 | 1.1250 | 1.1000 | 1.2990 | 1.2540 | 15/32 | 0.4830 | 0.4550 | 1.7500 | 2.0000 |
| 7/8 | 0.8750 | 9 | 14 | 0.8750 | 0.8660 | 1 5/16 | 1.3120 | 1.2850 | 1.5160 | 1.4650 | 35/64 | 0.5630 | 0.5310 | 2.0000 | 2.2500 |
| 1 | 1.0000 | 8 | 14 | 1.0000 | 0.9900 | 1 1/2 | 1.5000 | 1.4690 | 1.7320 | 1.6750 | 39/64 | 0.6270 | 0.5910 | 2.2500 | 2.5000 |
| 1 1/8 | 1.1250 | 7 | 12 | 1.1250 | 1.1140 | 1 11/16 | 1.6880 | 1.6310 | 1.9490 | 1.8590 | 11/16 | 0.7180 | 0.6580 | 2.5000 | 2.7500 |
| 1 1/4 | 1.2500 | 7 | 12 | 1.2500 | 1.2390 | 1 7/8 | 1.8750 | 1.8120 | 2.1650 | 2.0660 | 25/32 | 0.8130 | 0.7490 | 2.7500 | 3.0000 |
| 1 3/8 | 1.3750 | 6 | 12 | 1.3750 | 1.3630 | 2 1/16 | 2.0620 | 1.9940 | 2.3820 | 2.2730 | 27/32 | 0.8780 | 0.8100 | 3.0000 | 3.2500 |
| 1 1/2 | 1.5000 | 6 | 12 | 1.5000 | 1.4880 | 2 1/4 | 2.2500 | 2.1750 | 2.5980 | 2.4800 | 15/16 | 0.9740 | 0.9020 | 3.2500 | 3.5000 |
- All dimensions are in inches.
- Usable thread length for Hex Head Cap Screws under 6 1/4" long can be approximated by the equation THREAD LENGTH = (2 X DIAMETER) + 1/4″