76579-4 Stewart Warner Hobbs Pressure Switch | 4 PSI | 1/8" NPT | Genuine OEM NOS

76579-4 Stewart Warner Hobbs Pressure Switch – 4 PSI – Genuine OEM (NOS)

Product Summary:

Genuine Stewart Warner Hobbs pressure switch, part number 76579-4. This compact, corrosion-resistant switch is designed to activate electrical circuits based on system pressure and is suitable for use with air, motor oil, transmission oil, jet fuels, and similar hydrocarbon media. The switch has a 4 PSI set point, 1/8" NPT male thread, and 3-screw terminals. New old stock (NOS) — unused and in original condition, though it may show minor signs of long-term storage.

Specs & Features:

• Part Number: 76579-4 (SW76579-4)
• Component: Pressure Switch
• Condition: New Old Stock (NOS)
• Manufacturer: Stewart Warner / Hobbs
• Set Point: 4 PSI
• Thread Size: 1/8"-27 NPTF Male
• Terminal: 3-Screw Terminal
• Contact: Normally Open or Normally Closed
• Media Compatibility: Air, motor oils, transmission oils, jet fuels, and other hydrocarbon media
• Temperature Range: -40°F to +250°F
• Electrical Ratings:
 – 15 AMP @ 6 VDC
 – 8 AMP @ 12 VDC
 – 4 AMP @ 24 VDC
• Proof Pressure: 290 PSI
• Burst Pressure: 435 PSI

What's Included:

• (1) Pressure Switch – 76579-4
• Packaging may not be included due to NOS status

Fitment Notes:

Confirm compatibility with your application’s pressure range, thread type, and electrical system before purchase.

Image Disclaimer:

Images may show the actual item or a representative equivalent. NOS parts may have minor cosmetic imperfections from long-term storage.

Warranty Policy:

This NOS product is sold as-is with no warranty expressed or implied