3F-7674 Nylon Insert Locknut
Description
Cat® fastener parts are designed for specific applications based on size, strength, clamp load and past performance, information other manufacturers do not have. They are carefully selected to last until machine rebuild or end of life. Non-Cat hardware and fasteners may appear to fit your machine, but no one else knows your equipment the way we do.
These nuts provide prevailing torque so that the nut does not back off. Do not use above 120 °C.
Features
- Cat fasteners are manufactured to precise technical specifications for outstanding durability, reliability, and productivity
- Strength and Quality – Fasteners meet or exceed ISO, ASTM, ASME, and SAE requirements.
- Cat bolts, nuts, and washers are specially designed to work together as a system to maximize clamping force.
- Coatings meet the special requirements of different applications (RoHS compliant).
Applications
Cat bolts form a high-performance system with mating hardened washers and nuts to produce consistent, high clamping force. You can trust Cat fasteners to help you build, maintain or rebuild in most machine and shop applications worldwide.
Specifications
| Class or Grade | SAE J995 Grade 8 |
|---|---|
| Thread Size (Diameter × Pitch) | 1/4×28 mm |
| Thread Direction | RH |
| Nut Width – 3 | 7/16 in |
| Thread | Fine Thread UNF |
| Hardened | None |
| Surface Finish | Zinc Plated |
| Hole Thread Pitch | 28 |
| Thread Size | .250 mm (0.01 in) |
| Drive Chain | 11.11 mm (0.437 in) |
| Material Description | SAE Grade 8 Equivalent |
| Coating | Zinc Electroplated (96 Hour Salt Spray Test) |
| Thickness | 8.3 mm (0.327 in) |
| Nut Model | Hex Head Self-Locking Nut |
| Thread Size (in – TPI) | 1/4 – 28 in |
Compatible Equipment
- Motor Graders: 3606
- Track Loaders: 992
- Dozers: D10
- Wheel Loaders: 834, 980, 992C
- Off-Highway Trucks: 773, 777
Additional information
| Machine Model | |
|---|---|
| Equipment Type | Wheel Loaders, Track Loaders, Dozers, Motor Graders, Off-Highway Trucks |
| Part Source | Genuine OEM |








