STEELMAN JS-79390 1in DR. 21MM 4-Point Standard Budd Impact Socket
Professional Truck Service - STEELMAN 1in Drive 21mm Budd Impact Socket (JS-79390)
Heavy-Duty 4-Point Square Socket for Fleet Mechanics
The STEELMAN JS-79390 1in Drive 21mm Budd Impact Socket is engineered specifically for heavy-duty truck and trailer wheel service. This 4-point square socket grips Budd-style inner cap nuts securely, preventing rounding and slippage that costs time and damages hardware. Built with drop-forged chromoly steel and rated to handle 150% of ASME torque requirements, this professional tool delivers reliable performance in fleet maintenance shops and roadside service calls.
Perfect Applications for Budd Impact Sockets
- Heavy-duty truck and trailer wheel maintenance in fleet service bays.
- Roadside tire changes and emergency repairs on commercial vehicles.
- Dual-wheel hub service where inner cap nut access is restricted.
- High-volume shops requiring fast, reliable wheel service tools.
- Preventive maintenance schedules on Budd-style wheel systems.
Technical Specifications
| Specification | Details |
|---|---|
| Drive Size | 1 inch (25.4 mm) |
| Socket Size | 21 mm (0.83 in) |
| Socket Style | 4-point (square) |
| Material | Drop-forged, heat-treated chromoly steel |
| Finish | Black phosphate, corrosion-resistant |
| Dimensions | 2.24 x 2.11 x 2.11 in (56.9 x 53.6 x 53.6 mm) |
| Weight | 1.34 lbs (0.61 kg) |
| Torque Rating | 150% of ASME requirements |
| Warranty | Lifetime Limited |
Get Professional Budd Socket Performance for Your Shop
Eliminate stripped cap nuts and tool slippage with the precision-engineered STEELMAN JS-79390. This impact socket delivers the reliability fleet mechanics need for efficient wheel service operations.
Order your 1in drive 21mm Budd impact socket today and experience faster, more reliable truck wheel maintenance.
Frequently Asked Questions
How does this compare to standard 6-point impact sockets?
This 4-point square socket grips the sides of inner cap nuts instead of corners, preventing the rounding and slippage common with 6-point sockets on Budd wheels. The square design matches the nut geometry precisely.
Will this socket work with all 1-inch drive impact guns?
Yes, the ball detent recess secures this socket to any standard 1-inch drive impact wrench, air gun, or manual ratchet. It fits pneumatic, electric, and cordless impact tools commonly used in truck service.
What makes this socket suitable for heavy-duty truck applications?
The drop-forged chromoly steel construction and black phosphate coating resist corrosion from road salt and grime. It's rated for 150% of ASME torque requirements, handling the high forces needed for seized truck wheel hardware.
Can this socket be used on other square fasteners besides Budd wheels?
While designed specifically for Budd-style wheel cap nuts, this 4-point socket works on any 21mm square fastener where precise fitment is needed to avoid rounding or damage.
How long does this socket typically last in professional use?
With the lifetime limited warranty and heat-treated chromoly steel construction, this socket withstands years of daily fleet service use. The laser-etched size markings remain readable even after extensive cleaning and handling.
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