Overview
The LE USA M000074 00733253 3/4-10 X 2 A325-1 structural bolt is a Grade 5, heavy hex head fastener designed for critical structural steel connections. This lot includes two sealed boxes containing five bolts each (10 total), meeting ASTM F3125 specifications for reliability in bridge, building, and infrastructure projects.
Key Features
- Heavy hex head design for maximum wrench engagement and load distribution
- ASTM A325 Type 1 Grade 5 rating ensures high tensile strength and durability
- 3/4″ diameter, 10 TPI (threads per inch) coarse thread standard
- 2″ overall length—ideal for connecting structural steel members and plates
- Plain (unfinished) carbon steel for field coating or galvanizing
- Domestically manufactured for code compliance in U.S. projects
- Two sealed boxes; 10 bolts per lot
Technical Specifications
| Thread Size / Pitch | 3/4″-10 UNC (Unified National Coarse) |
| Overall Length | 2 inches |
| Head Style | Heavy Hex Head |
| Grade / Type | ASTM A325 Type 1 (Grade 5) |
| Tensile Strength | 120,000 PSI minimum |
| Material | Carbon Steel |
| Finish | Plain (unfinished) |
| Rockwell Hardness | C25 to C34 |
| Head Diameter | 1-1/4″ (approx.) |
| Quantity Per Lot | 10 bolts (two 5-bolt boxes) |
| Manufacturer | LE USA |
| Part Number | M000074 / 00733253 |
Typical Applications
- Structural Steel Connections: Joining beams, columns, and plates in buildings and industrial structures
- Bridge Construction: Primary and secondary structural fastening in highway and pedestrian bridges
- Heavy Equipment: Base plate anchoring for large machinery and industrial equipment
- Infrastructure: Transmission towers, water tanks, and pressure vessels
- Code-Compliant Projects: Projects requiring certified ASTM A325 fasteners for inspection and approval
Compatibility & Replacements
Compatible With
- Standard 1-1/4″ hex nuts (2H or heavy duty nut)
- ASTM F436 flat washers
- F436M hardened washers for high-strength assembly
- Any structural steel connection designed for 3/4″-10 fasteners
- Field coatings: hot-dip galvanize, paint, or dry-film lubricants
- Torque-controlled and calibrated wrench applications
Replaces / Drop-In Replacement For
- Other ASTM A325 Type 1, 3/4″-10 X 2″ heavy hex bolts with plain finish
- Industry-standard Grade 5 structural bolts from other manufacturers in the same specification
- LE USA M000074 bolts sold individually or in different packaging configurations
Works With
- Standard structural steel design software (AISC connections)
- Torque specifications per ASTM A325 standards (typically 830–1090 ft-lbs for 3/4″ bolts)
- Calibrated impact wrenches and manual wrench application methods
- Inspection and load-testing protocols required for critical structural fastening
