JIS B 1178 L Type Anchor Bolts
JIS B 1178 (L) L-Type Anchor Bolts are metric foundation bolts designed with a 90° bent configuration for securely anchoring structural components, steel structures, machinery, equipment, and other assemblies to concrete foundations. Manufactured according to the dimensional requirements of JIS B 1178 (L), these L-shaped anchor bolts provide a reliable embedded anchoring solution where the bent section is installed into concrete and the threaded section is used to secure the connected component.
We manufacture JIS B 1178 (L) anchor bolts in metric sizes with options for carbon steel, alloy steel, and stainless steel. Depending on the application, they can be supplied with plain, zinc-plated, or hot-dip galvanized finishes for enhanced corrosion protection. Standard dimensions are available according to JIS B 1178 (L), while larger sizes, custom lengths, thread lengths, bend dimensions, materials, grades, and surface treatments can be produced according to customer drawings and project requirements.
Specification:
JIS B 1178 (L) anchor bolts are metric L-shaped foundation bolts designed for anchoring structural components, machinery, equipment, and steel structures to concrete foundations. The dimensional requirements for Type L anchor bolts are specified in JIS B 1178, while material, mechanical properties, thread tolerances, and surface finishes can be selected according to project requirements and applicable material or coating standards.
| Item | Specification |
|---|---|
| Product Type | L-Type Anchor Bolts |
| Dimensional Standard | JIS B 1178(L) |
| Thread Type | Metric Coarse |
| Thread Standard | ISO261,ISO965 |
| Thread Tolerance | 6g |
| Size Range | M8-M72 |
| Material | Carbon Steel, Alloy Steel,Stainless Steel |
| Carbon Steel&Alloy Steel Grade | ISO 898-1 Class 4.8,8.8,10.9 |
| Stainless Steel Standard | ISO 3506-1 A2,A4 |
| Surface Finish | Plain,Zinc Plated,Hot Dip Galvanized |
| HDG Standard | ISO10684 |
| Zinc Plating | ISO4042 |
| Inspection | Dimensions,Thread,Mechanical Property,Coating |
Dimension Chart of JIS B 1178 L Type Anchor Bolts:
| Thread Size(d) | M8 | M10 | M12 | M16 | M20 | M24 | M30 | M36 | M42 | M48 | M56 | M64 | M72 | 1-5/8 | 1-3/4 | 1-7/8 | 2 | 2-1/4 | 2-1/2 | 2-3/4 | 3 |
| P(Thread Pitch) | 1.25 | 1.5 | 1.75 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6 | 1.625 | 1.75 | 1.875 | 2 | 2.25 | 2.5 | 2.75 | 3 |
| b(tolerance+2p) | 31 | 36 | 40 | 50 | 58 | 68 | 80 | 94 | 106 | 120 | 140 | 160 | 180 | 1.613 | 1.738 | 1.863 | 1.988 | 2.238 | 2.488 | 2.738 | 2.988 |
| L1 | 32 | 40 | 48 | 64 | 80 | 96 | 120 | 144 | 168 | 192 | 224 | 256 | 288 | 2.438 | 2.625 | 2.812 | 3 | 3.375 | 3.75 | 4.125 | 4.5 |
| R | 16 | 20 | 24 | 32 | 40 | 48 | 60 | 72 | 84 | 96 | 112 | 128 | 144 | 2.356 | 2.538 | 2.719 | 2.9 | 3.262 | 3.625 | 3.988 | 4.35 |
| x(max) | 3.2 | 3.8 | 4.3 | 5 | 6.3 | 7.5 | 9 | 10 | 11 | 12.5 | 14 | 15 | 15 | 2.815 | 3.031 | 3.248 | 3.464 | 3.897 | 4.33 | 4.763 | 5.196 |
Application of JIS B 1178 L Type Anchor Bolts:
JIS B 1178 (L) L-Type Anchor Bolts are widely used for securing structural components and equipment to concrete foundations. The 90° bent section provides a strong anchoring point within concrete, while the threaded end allows easy installation and adjustment of nuts, washers, base plates, and other connected components.
Construction & Structural Applications
L-Type Anchor Bolts are commonly used to secure steel columns, structural frames, base plates, handrails, supports, and other steel components to concrete foundations. Carbon steel L anchor bolts are suitable for general construction and structural applications, while hot-dip galvanized anchor bolts can provide additional corrosion protection for outdoor installations and exposed environments.
Machinery & Equipment Installation
These foundation bolts are also used for installing machinery, industrial equipment, pumps, motors, generators, and other equipment that requires secure fastening to a concrete foundation. The L-shaped embedded section provides mechanical anchorage in concrete, making the bolts suitable for both permanent equipment foundations and structural support systems.
Corrosive & Stainless Steel Applications
For applications requiring higher corrosion resistance, stainless steel L-Type Anchor Bolts can be supplied in SUS304 and SUS316 grades. SS304 anchor bolts are commonly used for outdoor structures, equipment supports, architectural installations, and general environments where good corrosion resistance is required. SS316 anchor bolts offer improved resistance to chlorides and marine or chemically exposed environments, making them suitable for coastal structures, marine equipment, chemical-processing facilities, wastewater systems, and other demanding applications.
JIS B 1178 (L) anchor bolts can also be customized in material, diameter, overall length, thread length, bend dimensions, and surface treatment according to customer drawings and project requirements.