391-2167 3/8″-16 Hex Flange Nut
Lock Nut
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.
Features
- Cat fasteners are manufactured to precise specifications for durability, reliability and high efficiency
- Strength and Quality – Fasteners meet or exceed ISO, ASTM, ASME and SAE requirements.
- Cat bolts, nuts and washers are specifically designed to work together as a system to maximize clamping force.
- Coating meets the special requirements of different applications (RoHS compliant).
Applications
Cat bolts form a high-performance system with mating washers and nuts to produce consistent, high clamping force. You can rely on Cat fasteners to help you build, maintain or rebuild – for most machine and shop applications around the world.
Specifications
| Thread Size (Diameter × Pitch) | 3/8×16 mm |
|---|---|
| Class or Grade | Martensitic ISO 3506-2-C1 |
| Thread Size | 0.375 mm (0.015 in) |
| Hole Thread Pitch | 16 |
| Thread Direction | RH |
| Drive Chain | 15.88 mm (5/8 in) |
| Flange Diameter | 19.05 mm (0.75 in) |
| Thickness | 12 mm (0.472 in) |
| Height | 0.47 in |
| Thread | RH Coarse |
| Nut Model | Flange Lock Nut |
| Thread Size (in – TPI) | 3/8-16 in |
| Material | Coating Fluid |
| Material Description | Austenitic Stainless Steel |
| Coating | Flash Silver Plated + Lubricant Topcoat |
Compatible Equipment
- Generator Sets: 3516C, 3512E, G3516, 3512B
- Track Loaders: 990K, 992, 993, 995, 994K
- Wheel Excavators: MD6250, MD6310
- Engines: C32, C27, C15, C18
- Dozers: D6T, D10R, D7G2, D6G2 LGP, D10T2, D11T, D9R, D6R, D6G2 XL, D10, D11
- Excavators: 3512C, 3516E, 6040, 330 L, 330B, 6015B, 6030, 6020B, 3516B, 6015
- Wheel Loaders: 972G, 966F, 990H
- Off-Highway Trucks: 798 AC, 789D, 794 AC, 777E, 725, 785, 777D, 785D, 789, 773F, 793D, 793, 796 AC, 777, 773
- Asphalt Pavers: AD63
- Skid Steer Loaders: 24
Additional information
| Machine Model | 24, 330 L, 330B, 3512B, 3512C, 3512E, 3516B, 3516C, 3516E, 6015, 6015B, 6020B, 6030, 6040, 725, 773, 773F, 777, 777D, 777E, 785, 785D, 789, 789D, 793, 793D, 794 AC, 796 AC, 798 AC, 966F, 972G, 990H, 990K, 992, 993, 994K, 995, AD63, C15, C18, C27, C32, D10, D10R, D10T2, D11, D11T, D6G2 LGP, D6G2 XL, D6R, D6T, D7G2, D9R, G3516, MD6250, MD6310 |
|---|---|
| Equipment Type | Excavators, Wheel Excavators, Wheel Loaders, Track Loaders, Skid Steer Loaders, Dozers, Off-Highway Trucks, Asphalt Pavers, Engines, Generator Sets |
| Part Source | Genuine OEM |








