Carriage Bolt & Barrel Torx Nut Kit — 5/16-18 x 1"
Part Number: 516C1CB5Z-KIT
OEM-style hardware for cargo trailer bar-locks, cam handles, toolbox hasps, swing-door hinges, and any application requiring a secure, low-profile interior finish. Includes one carriage bolt and one flanged barrel Torx nut — the exact fastener style used across enclosed trailer manufacturers nationwide.
Kit Contents
| Item | Specification | Qty |
| Carriage Bolt | 5/16-18 x 1", Grade 5, Zinc, Square Neck | 1 |
| Flanged Barrel Torx Nut | 5/16-18 x .597" L, T45 Torx / 7/32" Allen | 1 |
Technical Specifications
| Specification | Detail |
| Thread | 5/16-18 (Coarse) |
| Bolt Length | 1" |
| Material | Grade 5 Steel |
| Finish | Zinc Plated |
| Head Diameter | 1" |
| Barrel Diameter | .430" |
| Required Tool | T45 Torx or 7/32" Allen |
| Bolt Pass-Through | No – Solid End Nut |
Where This Fits
This specialty bolt + flanged barrel nut is widely used across cargo trailers, utility trailers, enclosed trailers, motorcycle haulers, toolboxes, and locking hardware assemblies.
| Application | Typical Components | Why This Bolt/Nut Is Used |
| Bar-Lock Door Rods | Cam latch plates, lock-rod brackets | Low-profile interior + secure exterior head |
| Swing Door Hinges | Hinge plates, corner protectors | Prevents easy removal; Torx barrel increases security |
| Side Door Hardware | Locking handles, latch housings | Zinc plating resists corrosion in high-use areas |
| Interior Hasps | Tie-down rings, latch plates | Square neck locks bolt in place during tightening |
| Toolbox / Generator Box | Hinges, latch plates | Short depth fits tight spaces; clean interior finish |
R & P Carriages — Seneca, Illinois
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