Howmet M39058 M-4 Air Riveter, Heavy Duty Pneumatic/Hydraulic, 3/32 to 1/4 Inch Capacity, 0.748 Inch Stroke, 85 to 95 PSI

Howmet M39058 M-4 Air Riveter, Heavy Duty Pneumatic/Hydraulic, 3/32 to 1/4 Inch Capacity, 0.748 Inch Stroke, 85 to 95 PSI

• Howmet M39058 is the Marson M-4 air riveter designed to set blind rivets in all alloys from 3/32 to 1/4 inch. With 0.748 inch stroke and about 3500 pounds pulling force, it supports structural rivets with optional nosepieces. This is a complete riveting tool, not a replacement part for another SKU.
• Features:
  • Capacity 3/32 to 1/4 inch in aluminum, steel, and stainless helps cover common production and repair applications
  • Approximately 3500 pounds pulling force and 0.748 inch stroke provide reliable setting of many structural blind rivets
  • Recommended 85 to 95 PSI operating pressure and 1/4 inch NPT air inlet integrate with standard shop air systems
  • Includes multiple nosepieces, wrenches, and a safety cap to speed setup, service, and safer mandrel capture
  • Packaged in a compartment storage case for organized transport and tool protection
• Includes:
  • Installed 1/4 inch nosepiece
  • Standard nosepieces 3/32 inch, 1/8 inch, 5/32 inch, 3/16 inch
  • Spanner and spanner gauge
  • Service wrenches
  • Safety cap for mandrel collection
  • Compartment storage case
• Specifications:
  • Manufacturer: Howmet
  • Part Number: M39058
  • Alternate Part Numbers / Cross References: MRM39058
  • Category: Riveting Tools; Subcategory: Air Hydraulic Riveters; Product Type: Pneumatic/hydraulic blind rivet tool
  • Rivet Capacity: 3/32 to 1/4 inch in all alloys; structural rivets with optional nosepieces
  • Stroke: 0.748 inch
  • Pulling Force: about 3500 pounds
  • Operating Pressure: 85 to 95 PSI
  • Air Inlet: 1/4 inch NPT
  • Overall Length: about 12 inch
  • Weight: about 6.6 pounds
  • System Compatibility / Application: Blind rivet installation on production lines and repair; complete tool, not a replacement part for a specific SKU
• The M-4 air riveter can also be referred to as pneumatic hydraulic rivet tool, heavy duty air riveter, blind rivet gun 1/4 inch capacity, Marson M-4 riveter, and Howmet M39058 riveter.

Howmet manufactures engineered fastening tools and accessories under the Marson brand, supplying pneumatic and battery riveters and related tooling for industrial and transportation assembly.

Q: Which nosepieces are included with the tool?
A: The tool ships with a 1/4 inch nosepiece installed and includes 3/32 inch, 1/8 inch, 5/32 inch, and 3/16 inch nosepieces, plus spanner tools and a safety cap.

Q: What air supply do I need?
A: Provide clean, regulated shop air at 85 to 95 PSI with a 1/4 inch NPT connection and adequate flow per the manual.

Q: Can it set structural blind rivets?
A: Yes, the M-4 can set many structural blind rivets; some types may require optional nosepieces. Always confirm the specific rivet with the manual.