Guardrail Bolts (DUPLICATE)
Our high-performance guardrail bolts are engineered for strength, durability, and safety in critical roadside and industrial applications. Designed to meet rigorous industry standards, these bolts ensure secure fastening of guardrail systems, providing long-lasting protection in high-impact environments.
Applications
Guardrail bolts are essential components in a wide range of safety and infrastructure applications. Most commonly, they are used to securely fasten guardrail systems along highways, roads, and bridges, helping to protect motorists by absorbing and redirecting impact forces during collisions. Beyond transportation infrastructure, these bolts are also widely employed in industrial settings such as warehouses, loading docks, and manufacturing facilities, where they anchor protective barriers that safeguard equipment and personnel. Additionally, guardrail bolts are frequently used in parking structures, pedestrian walkways, and construction zones, offering a reliable solution for both temporary and permanent safety installations.
Specs
The AASHTO M 180 specification covers steel components used in highway guardrail applications, including bolts, nuts, washers, guardrail beams, end sections, terminal connectors, backup plates, guardrail posts, and anchorage wire rope and swage fittings. Guardrail splice bolts and post bolts are typically manufactured to meet the chemical and mechanical requirements of ASTM A307 Grade A and are hot-dip galvanized for enhanced corrosion resistance.
- Post Bolts: Used to fasten the W-Beam guardrail panels to vertical posts. Longer than splice bolts, they typically start at 2″ with specialty applications requiring extended lengths up to 46″.
- Splice Bolts: Used to connect overlapping sections of guardrail panels end-to-end. The oval neck design locks into the rail slot to prevent rotation. Standard size: 5/8” × 1-1/4”. Proper installation is critical for guardrail performance in collisions.
Stock List
Portland Bolt Northeast stocks thousands of post bolts and splice bolts, which are available for immediate shipment.
Splice Bolts (Round Head, Oval Neck)
Size Grade Finish Part Number 5/8” x 1-1/4” A307 Grade A Galvanized 21216 5/8" x 1-1/4" Trimmed A307 Grade A Galvanized 21218 Post Bolts (Round Head, Oval Neck)
Size Grade Finish Part Number 5/8"-11 X 2" A307 A Galvanized 21185 5/8 X 3" A307 A Galvanized 21171 5/8"-11 x 3-1/2" A307 A Galvanized 21192 5/8"-11 X 4-1/2" A307 A Galvanized 21193 5/8-11 X 6" A307 A Galvanized 21196 5/8"-11 X 8" A307 A Galvanized 21197 5/8-11 X 8-1/2" A307 A Galvanized 21198 5/8"-11 X 9-1/2" A307 A Galvanized 21199 5/8"-11 X 10" A307 A Galvanized 21174 5/8"-11 X 10-1/2" A307 A Galvanized 21176 5/8-11 X 12" A307 A Galvanized 21177 5/8"-11 X 13-1/2" A307 A Galvanized 21167 5/8-11 X 14" A307 A Galvanized 21168/21178 5/8"-11 X 16" A307 A Galvanized 21179 5/8-11 X 18" A307 A Galvanized 21181 5/8"-11 X 18-1/2" A307 A Galvanized 21182 5/8-11 X 19" A307 A Galvanized 21183 5/8"-11 X 22" A307 A Galvanized 21186 5/8"-11 X 24" A307 A Galvanized 21187 5/8"-11 X 26" A307 A Galvanized 21188 5/8"-11 X 28" A307 A Galvanized 21189 5/8"-11 X 32" A307 A Galvanized 21190 5/8"-11 X 34" A307 A Galvanized 21191 5/8"-11 X 36" A307 A Galvanized 21173
Custom Guardrail Bolt Sizes
While we keep the most popular items readily available for immediate purchase, we also supply special order non-stock sizes.
FAQs
Yes. Guardrail bolts are available as complete assemblies packaged with A563 hex nuts and F436 washers to match your project requirements. Hardware can also be hot-dip galvanized per ASTM F2329 for corrosion resistance and long-term outdoor performance.
Standard sizes like 5/8″ x 1-1/4″ splice bolts and common post bolt lengths are often in stock for immediate shipment. Large DOT quantity orders or non-standard sizes can typically be produced in 1–2 weeks, depending on current shop loading and galvanizing requirements.
Absolutely. In addition to stock sizes, we manufacture custom guardrail bolts in non-standard lengths, thread lengths, or coatings to meet unique jobsite conditions. Whether you need longer bolts for oversize posts or special threads for repair work, our in-house manufacturing allows fast turnaround and consistent quality.
Guardrail bolts are most commonly supplied hot-dip galvanized for long-term outdoor durability, but we also offer plain steel for site-specific coating applications and mechanically galvanized options upon request. All finishes comply with recognized industry standards for performance and protection in exposed environments.
PRODUCT USED IN
8th Avenue Bridge Over South Platte River
About The Project The West 8th Ave Bridge closed in September 2021 after 92 years of use. Denver’s Department of Transportation proposed a renovation offering a second eastbound travel lane and ten-foot sidewalks making the bridge wider and safer for pedestrians. The South Platte River Trail also received attention, with new concrete ramps allowing cyclists to travel underneath. Although the bridge was renovated once about 60 years ago, these new refurbishments will last for centuries thanks to Portland Bolt. Portland Bolt's Contribution This project specified F1554-55 fully threaded anchors to be hot-dip galvanized, which was completed in-house. The rods were... View More