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 |
Why Choose This Hardware
- Low-profile interior — no exposed bolt threads inside the trailer
- Tamper-resistant Torx barrel nut increases security
- OEM-style hardware used by top trailer manufacturers
- Perfect for thin-wall trailer construction
- Strong, corrosion-resistant zinc finish
- Easy installation in tight spaces
R & P Carriages — Seneca, Illinois
Trailer Parts • Service • Sales
Mon–Fri: 9:00–5:00 • Saturday: 9:00–3:00
We stand behind everything we sell — satisfaction guaranteed.
Shipping
We ship quickly and carefully, with tracking provided on every order. Most items ship the same or next business day. Your parts will arrive safely and on time, ready to use.
Returns & Guarantee
Your satisfaction is guaranteed. Returns, refunds, and exchanges are accepted — no hassle. We stand behind every part we sell, so you can purchase with confidence.
Committed to Customer Service
At R and P Carriages, we believe in treating our customers like family. Whether you need a small replacement part or a complete trailer service, we’re here to help with friendly, expert support every step of the way.
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