Headed Anchor Bolts
A headed anchor bolt is a straight anchor bolt with a forged head on the non-threaded end, formed as a hex, heavy hex, or square head rather than a hook or a welded nut. This head is what distinguishes it from a bent anchor bolt or an anchor rod. Unlike an anchor rod that relies on a bottom nut for holding power, the headed anchor bolt uses its integral forged head to develop anchorage inside the concrete.Importantly, a headed anchor bolt is not the same as a threaded rod with a tack welded nut. A rod with a welded nut should never be substituted for a bolt requiring a forged head without approval from the Engineer of Record, since the forged head and the welded assembly may not carry load the same way.
Applications
Headed anchor bolts are used to anchor structural steel and other components to concrete foundations in place of a rod with a bottom nut. The headed end is embedded into the concrete, where the forged head resists pullout, while the threaded end projects above the foundation to receive a nut and washer.
Common applications include securing structural steel columns, bridge rail, and substation structures. They are widely specified across steel fabrication, highway construction, and power and energy work wherever a straight embedded anchor with a forged head is preferred over a bent or nutted rod.
Note: A threaded rod with a welded nut IS NOT a headed anchor bolt and should not be substituted for an anchor bolt requiring a forged head without approval from the Engineer of Record.
Manufacturing
Portland Bolt manufactures headed anchors from 1/2″ through 2-1/2″ diameter in many different ASTM specifications. They are provided either plain finish or hot-dip galvanized.
Stock F1554 Grade 36 Headed Anchor Bolts
The following sizes and finishes are stocked at Portland Bolt under the given part number.
| Length | Diameter | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" | 5/8" | 3/4" | 7/8" | 1" | ||||||
| Plain | Galv. | Plain | Galv. | Plain | Galv. | Plain | Galv. | Plain | Galv. | |
| 8 | - | 17490 | - | 17997 | 18035 | 18036 | - | - | - | - |
| 10 | - | 17492 | - | 17999 | 18007 | 18008 | - | - | - | - |
| 12 | - | 17494 | 18000 | 18001 | 18009 | 18010 | - | - | 18049 | 18050 |
| 14 | - | - | - | - | 18013 | 18014 | - | - | 18051 | - |
| 16 | - | - | - | - | 18017 | 18018 | - | 18040* | - | 18054 |
| 18 | - | 17496 | 18002 | 18003 | 18021 | 18022 | 18046* | 18041* | 18055 | 18056 |
| 20 | - | - | - | - | 18023 | 18024 | - | 18042* | - | 18058 |
| 22 | - | - | - | - | - | 18026 | - | - | - | - |
| 24 | - | - | - | 18005 | 18027 | 18028 | 18047* | 18043* | 18061 | 18062 |
| 26 | - | - | - | - | 18029 | 18030 | - | - | - | - |
| 30 | - | - | - | - | - | 18034 | - | 18045* | 18871 | 18872 |
| 36 | - | - | - | - | - | - | - | - | 18876 | 18877 |
| Other sizes and finishes available on request. * These products supplied as F1554 Grade 55 | ||||||||||
Portland Bolt stocks these F1554 grade 36 hex head anchor bolts that are ready for immediate shipment. These hex bolts have a forged hex head and are not a rod with a tack welded nut. We stock a wider range of F1554 grade 36 headed anchor bolts in a hot-dip galvanized finish than in a plain finish.
Galvanized anchor bolts can usually be substituted for plain finish anchor bolts, especially when a quick delivery is required. If substituting a galvanized anchor bolt is not acceptable, Portland Bolt can always manufacture F1554 grade 36 headed anchor bolts in a plain finish. All stock F1554 headed anchor bolts have a 4″ or 6” thread length.
Hex & Heavy Hex Blank Stock
Portland Bolt stocks both F1554 Grade 36 and F1554 Grade 55 hex and heavy hex head blanks (round bar with a forged head) in lengths of 36”. These blanks can be cut to length, threaded, and galvanized (when required) very quickly. Blanks are perfect for manufacturing relatively small runs of custom-sized F1554 headed anchor bolts with very short lead times.
| 36” Long Blank | 1/2” | 5/8” | 3/4” | 1” | 1-1/8” | 1-1/4” | 1-3/8” | 1-1/2” |
|---|---|---|---|---|---|---|---|---|
| F1554 Grade 36 Hex | • | • | • | • | • | • | • | • |
| F1554 Grade 55 Heavy Hex | • | • | • | • |
FAQs
A headed anchor bolt is a straight anchor bolt with a forged hex, heavy hex, or square head on the non-threaded end. The head is embedded in concrete to anchor structural steel, bridge rail, and similar components.
A headed anchor bolt uses an integral forged head to develop anchorage in concrete, while an anchor rod typically relies on a bottom nut for holding power. The forged head replaces the need for a welded nut at the embedded end.
No. A threaded rod with a tack welded nut is not a headed anchor bolt and should not be substituted for one that requires a forged head without approval from the Engineer of Record. The forged head and welded nut may not carry load the same way.
Portland Bolt manufactures headed anchor bolts from 1/2″ diameter through 2-1/2″ diameter in many different ASTM specifications.
Available specifications include F1554, A307, A449, A354, and F593, among others. F1554 is the most common specification for anchor bolts.
Headed anchor bolts are available in plain black finish or hot-dip galvanized. Galvanized bolts offer added corrosion protection and can often be substituted for plain finish bolts when quick delivery is required.
The head is a forged hex, heavy hex, or square head on the embedded end. It is forged in-house rather than welded on.
Yes. Portland Bolt stocks a range of F1554 Grade 36 and Grade 55 headed anchor bolts ready for immediate shipment, with a wider selection in hot-dip galvanized than in plain finish. The company also stocks F1554 Grade 36 and Grade 55 hex and heavy hex blanks for fast custom manufacturing.
All stock F1554 headed anchor bolts have either a 4″ or 6″ thread length, depending on the bolt length.
They are used to anchor structural steel columns, bridge rail, and substation structures to concrete foundations in place of a rod with a bottom nut.