Suzhou Runtai Precision Hardware Co,.Ltd.
We are professional manufacture factory of screws, bolts, rivets, nuts,bushing and non-standard fastener from China.
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Black Zinc Plated Class 8.8 Steel Hex Head Screws Grade 8.8 Steel Hex Bolts
Products Descriptions
Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. Made from class 12.9 steel, they are at least 25% stronger than medium-strength steel screws.The black zinc plating resists corrosion in wet environments. Material meets SAE J429 specifications for quality. Class 12.9 steel hex head screws are marked with six radial lines. Length is measured from under the head.
Products Specifications
| Head Type | Hex |
| Drive Style | External Hex |
| System of Measurement | Inch |
| Thread Direction | Left Hand |
| Thread Size | 5/8"-11 |
| Screw Size Decimal Equivalent | 0.625" |
| Thread Type | UNC |
| Thread Fit | Class 2A |
| Length | 3" |
| Threading | Fully Threaded |
| Thread Spacing | Coarse |
| Head | |
| Width | 15/16" |
| Height | 27/64" |
| Fastener Strength Grade/Class | Class 12.9 |
| Material | Steel |
| Finish | Zinc black Plated |
| Tensile Strength | 150,000 psi |
| Hardness | Rockwell C33 |
| Specifications Met | SAE J429 |
| RoHS | Not Compliant |
Note: Material, Size and Surface Treatment for choose.
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