Electro Hardware THN5008M07F16 Thumb Nut 5/16-18 Unc

Product Description

The ELECTRO HARDWARE THN5008M07F16 is a round knurled thumb nut machined from Grade 302/303 stainless steel with an uncoated, bright finish. It accepts a 5/16-18 UNC thread and measures 13/32 inches (0.4063 inches) in overall height with a 5/8 inch (0.625 inches) head diameter. The knurled round head provides secure hand-tightening grip without tools, making it well suited for assemblies that require frequent manual adjustment or removal. Licensed trades and industrial maintenance technicians install this fastener wherever corrosion resistance and tool-free accessibility are priorities. It conforms to QQ-S-763 material standards.

This thumb nut is used in light to medium-duty mechanical assemblies across HVAC, electrical enclosure, plumbing fixture, and general industrial applications. The stainless steel construction resists oxidation and mild chemical exposure, making it appropriate for both indoor and outdoor installations. The UNC thread form is widely compatible with standard inch-series tapped holes and mating hardware. Its compact profile — 5/8 inch head diameter and a base diameter of approximately 0.531 inches — fits flush in confined panel and bracket configurations.

Key Features

• Grade 302/303 stainless steel construction for corrosion resistance
• 5/16-18 UNC thread for compatibility with standard inch-series tapped holes
• Round knurled head enables secure hand-tightening without tools
• Bright, uncoated finish — no coating to chip, flake, or add dimensional variation
• Conforms to QQ-S-763 stainless steel material standard
• Compact head diameter of 5/8 inches suits confined enclosure and panel installs

Compatibility

Designed for use in any assembly with a standard 5/16-18 UNC tapped hole requiring a hand-operated stainless steel thumb nut. Thread Standard is listed as both UNC and UNF in supplier specifications — verify thread form with the mating component before installation.

Installation Notes

Installation requires no special tools; the knurled head is designed for hand tightening only — do not apply wrench or plier torque to the head, as this may damage the knurl or overstress the mating threads. Ensure the mating tapped hole is clean, free of debris, and dimensionally correct for 5/16-18 thread engagement before installation. For installations inside electrical enclosures, follow applicable NEC guidelines and de-energize the panel before working in the enclosure. In corrosive or wet environments, inspect thread engagement periodically to confirm seating has not loosened due to vibration.