Sale! 5/16"-24 x 4" Yellow Zinc Hex Head Cap Screw Grade 8Grade 8 Hex Head Cap Screws are manufactured from medium carbon alloy steel that has been quenched and tempered for strength. Grade 8 is the highest grade offering of the SAE J429 classification with a mi
5/16″-24 x 4″ Yellow Zinc Hex Head Cap Screw Grade 8
Grade 8 Hex Head Cap Screws are manufactured from medium carbon alloy steel that has been quenched and tempered for strength. Grade 8 is the highest grade offering of the SAE J429 classification with a minimum tensile strength exceeding that of Gr.5 by 25% to over 40%, depending on the diameter. Grade 8 HHCS are commonly used in heavy construction equipment, commercial vehicles and applications that demand a high strength fastener. Hex Head Cap screws feature an integral washer face under the head for a smooth bearing surface and a chamfered thread at the tip to allow for ease of assembly. They can be used in a threaded hole or mated with a nut in a through bolting application. Grade 8 bolts are identified by a head marking with 6 radial lines evenly spaced 60 degrees apart. They meet the material specification SAE J429 Grade 8 and can be supplied either in a plain finish or with a Zinc Yellow (Dichromate) plating with a chromate secondary layer that offers additional protection from corrosion and has an attractive yellow/gold appearance.
| Manufacturer | KL Jack Quality Vendor |
| Item Type | Hex Cap Screw – Inch |
| System of Measurement | Inch |
| Drive Type | Hex |
| Diameter | 5/16″ |
| Length (inches) | 4″ |
| Finish | Yellow Zinc |
| Grade | 8 |
| Head Style | Hex |
| Hex Size | 1/2″ |
| Material | Steel |
| Supplier Part Number | 15604 |
| Tensile Strength | 150,000 PSI |
| Thread Length | 7/8″ |
| Threads Per Inch | 24 |
| Thread Style | Partial Thread |
| Thread Type | Fine |
31F400HCS8Z
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The following products are meant to be used or paired with the product above.
| Stainless Steel U-Bolt Kit (4 mounts) | ||
| 4 or 6 Point Deck Plate Mounting Kit | ||
| Life-Time Galvanized 4 Tube Kit |
Still looking for the perfect part? Having trouble finding it?
Call our product experts at603-224-7370and let us lend a hand.
Cost: $25
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