3J8281 Hex Head Bolts fit Caterpillar
3J8281 Hex Head Bolts fit Caterpillar
- New aftermarket part
- 30 day returns
- Manufacturer's warranty
3J8281 Hex Head Bolt for Caterpillar Equipment
3J8281 is a hex head bolt used in Caterpillar engine, generator set, and industrial engine equipment. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).
The bolt is intended for fastening applications on the listed Caterpillar equipment models. The supplied part is identified by SKU 3J8281 and is specified as a steel hex head bolt with a coarse thread, phosphate-and-oil surface treatment, and SAE J429 Grade 8 material classification.
Fitment
The part is used on equipment manufactured by Caterpillar in the following application groups:
- Caterpillar engine equipment
- Caterpillar generator sets
- Caterpillar industrial engines
Known Caterpillar model applications:
- Caterpillar 3176C
- Caterpillar 3306
- Caterpillar 3606
- Caterpillar 3608
- Caterpillar 3612
- Caterpillar 3616
The model list includes the 3606, 3608, 3612, and 3616 engine models. Application of a threaded fastener can depend on the specific engine arrangement and installation position, so the part number should be checked against the equipment parts documentation before installation.
Cross-reference numbers
| SKU | 3J8281 |
| Other number format | 3J-8281 |
| Part designation | Hex head bolt |
3J8281 and 3J-8281 are the number formats provided for the same part identification. No additional supplier or equipment-manufacturer cross-reference number is specified in the available product data.
Specifications
| Part type | Hex head bolt |
| Equipment brand | Caterpillar |
| Primary application | Engine, generator set, and industrial engine equipment |
| Thread type | Standard coarse thread |
| Thread size | 1 1/8-7 in |
| Thread diameter | 1 1/8 in |
| Threads per inch | 7 |
| Bolt length | 2 in |
| Material | Steel |
| Material standard | SAE J429 Grade 8 |
| Head marking | Six radial lines |
| Ultimate tensile strength | 150 ksi |
| Surface finish | Phosphate coating impregnated with oil |
| Coating description | Zinc phosphate plus oil |
| Specified head height | 0.72 in |
| Specified weight | 0.92 lb |
The supplied data identifies the fastener as a Grade 8 steel bolt with a 1 1/8-7 coarse thread and a nominal 2-inch bolt length. The phosphate-and-oil coating is listed as the surface treatment for the bolt. The head marking specification corresponds to six radial lines and is listed together with the 150 ksi ultimate tensile strength value.
Before installation, verify the bolt diameter, thread pitch, length, head dimensions, tightening requirements, and equipment arrangement against the service documentation for the applicable Caterpillar engine or machine. The available data does not specify a nut, washer, or other hardware as included with the bolt.
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