1/2"-13 x 3 Grade 8 Carriage Bolts (4-Pack) – Heavy-Duty Coarse Thread Bolts with Flat Washers & Nylon Lock Nuts –Round Head Square Neck SAE J429 Anti-Vibration 3.0"
Product details
| Management number | 228353026 | Release Date | 2026/05/31 | List Price | $7.47 | Model Number | 228353026 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
These 1/2"-13 x 3" (3.0") long Grade 8 (G8) Carriage Bolts are engineered for applications where strength, reliability, and vibration resistance matter most. Each pack includes 4 Grade 8 carriage bolts, 4 hardened flat washers, 4 Grade 8 nylon lock nuts. Designed for use in automotive repairs, trailer builds, agricultural equipment, shop machinery, and structural assemblies, this product eliminates the need to source parts separately—saving time while ensuring proper fit and performance. Whether you’re a professional mechanic, fabricator, or serious DIYer, this fastener kit delivers the confidence of industrial-grade hardware in a convenient, ready-to-use package.
- Complete 4-packs: Includes 4 Grade 8 carriage bolts, 4 hardened flat washers, 4 Grade 8 nylon lock nuts— everything you need for strong, vibration-resistant fastening in one convenient pack. Bolts 1/2" diameter x 3" long. Nuts and washers fit 1/2" bolts.
- Grade 8 Strength for Demanding Jobs: High-tensile SAE J429 Grade 8 bolts and nuts deliver superior load capacity and shear strength, making this kit ideal for automotive, trailer, machinery, and structural applications. All washers are hardened, which is compatible with a Grade 8 fastening system. Threads are made to the requirements of ASME B1.1. ASME B18.5 Dimensional Requirements. SAE J429 Material and Strength Level. ASTM F788 Surface Discontinuities. ASME B18.18 Inspection and Quality Assurance.
- Utimate Anti-Vibration Nylon Locking System: washers help prevent loosening under torque, shock, and movement — perfect for equipment that sees constant vibration or cyclic loads.
- Precision-Matched Components: All fasteners are 1/2"-13 UNC for reliable fit and consistent clamping force across every assembly — no mismatched hardware, no guesswork.
- Built for Pros & Serious DIYers: Whether you’re repairing equipment, building fixtures, or assembling heavy components, this kit delivers industrial-grade reliability in a compact, easy-to-store format.
| ASIN | B0GRKJ6BLR |
|---|---|
| Brand | Quantum Forge |
| Color | Yellow Zinc |
| Model | QFG35156-FBA |
| Set Name | Grade 8 Carriage Bolt Kit (4-Piece with Washers and Nuts) |
| Head Type | Round |
| Size Name | 1/2" x 3" Nylon Lock Nut Set |
| Metal Type | Alloy Steel |
| Unit Count | 4.0 Count |
| Part Number | QFG35156-FBA |
| Thread Size | 1/2"-13 |
| Thread Type | Unc |
| Manufacturer | Quantum Forge |
| Thread Style | Right Hand |
| Fastener Size | 1/2"-13 |
| Fastener Type | Carriage Bolt |
| Item Hardness | Grade 8 |
| Material Type | Alloy Steel |
| Exterior Finish | Yellow Zinc |
| Item Dimensions | 3 x 0.8 x 0.2 inches |
| Number Of Items | 4 |
| Thread Coverage | Fully Threaded |
| Number of Pieces | 4 |
| Outside Diameter | 0.5 Inches |
| Screw Head Style | Round |
| Manufacturer Grade | Grade 8 |
| Maximum Shear Strength | 150,000 psi min tensile |
| Compatible Groove Diameter | 0.5 Inches |
Bestseller ranking
Art Paper
Customers who viewed this product also viewed
Uncategorized
![Apple Watch Series 9 [GPS 45mm] Smartwatch with Pink Aluminum Case with Pink Sport Loop. Fitness Tracker, Blood Oxygen & ECG Apps, Always-On Retina Display, Carbon Neutral](https://m.media-amazon.com/images/I/716UigEG5WL._AC_SL1500_.jpg)
Correction of product information
If you notice any omissions or errors in the product information on this page, please use the correction request form below.
Correction Request Form