Value Collection 1-EFS-10-17- Iron Thumb Screw 3/8-16

Product Description

The VALUE COLLECTION 1-EFS-10-17- is a winged thumb screw machined from iron with a zinc finish, designed for hand-tightened fastening applications where tools are not required for assembly or adjustment. The fastener uses a 3/8-16 UNC thread standard and measures 2.5 inches in length under the head, with an overall length of 3.375 inches. The winged head provides a secure grip surface for manual operation, while the shoulder construction adds a locating feature useful in jigs, fixtures, and equipment panels. This type of thumb screw is commonly installed by millwrights, maintenance technicians, and assembly professionals in light industrial and mechanical settings.

This thumb screw is suited for use in removable panel fastening, machine guards, shop fixtures, and equipment enclosures where frequent hand-removal is required. The zinc finish provides a basic level of corrosion resistance appropriate for indoor and light-duty service environments. The with-shoulder configuration seats consistently against mating surfaces, making it a practical choice for repeatable positioning in jigs and tooling setups.

Key Features

• 3/8-16 UNC thread for broad compatibility with standard inch-system tapped holes
• Winged head design allows hand-tightening without tools
• With-shoulder construction provides positive seating and location control
• Zinc finish offers basic corrosion protection for indoor use
• Iron construction delivers adequate strength for light to moderate clamping loads
• Overall length of 3.375 inches with 2.5 inches of usable thread length under head

Compatibility

Designed as a standard inch-series thumb screw for use in any application requiring a 3/8-16 UNC tapped hole and hand-operable fastening without tools.

Installation Notes

Installation requires a matching 3/8-16 UNC tapped hole in the mating component. Hand-tighten only using the winged head lobes — do not use a wrench or pliers on the head, as this can crack or deform the casting. Verify that the shoulder diameter seats correctly in any counterbored locating feature before applying final hand torque. Inspect threads for damage before installation to ensure full thread engagement.