The Grovtec One 7/8" Machine Screw With Nut And Spacer (Model: GTHM49) is a precision-machined steel firearm mounting accessory manufactured in the USA. Designed for through-drilled installations, this hardware set provides a secure mechanical anchor point for quick-detach (QD) sling swivels and stud-mounted bipods. It utilizes a 10-32 machine thread pitch paired with an internal backing nut and protective synthetic spacer, offering a rigid fastening solution for forends and hollow stocks where standard wood-screw threads are unsuitable.

Key Features

• Standard Stud Interface: Uses an Uncle Mike’s–style cross-hole geometry compatible with standard 1-inch and 1-1/4-inch locking quick-detach sling swivels, as well as stud-clamp rifle bipods.
• Precision Steel Construction: Heat-treated, precision-machined steel finished in protective black for shear resistance across rimfire and centre-fire recoil applications.
• Complete Fastener Assembly: Includes a matching 10-32 threaded nut and a synthetic washer to protect stock finishes from marring during installation.
• Through-Bolt Fastening: Provides mechanical retention for hollow or thin-walled synthetic and wood stocks requiring an internal backing anchor.

Specifications

• Model Number: GTHM49
• Thread Length: 7/8 inch (~22.2 mm)
• Thread Pitch: 10-32 machine screw
• Material & Finish: Heat-treated steel, black finish
• Package Weight: Approximately 0.114 lbs (~51.7 g)
• Net Hardware Weight: Under 30 g
• Country of Origin: USA
• Inclusions: 1 × 7/8" 10-32 machine screw swivel stud, 1 × 10-32 nut, 1 × synthetic spacer

Who is the Grovtec One 7/8" Machine Screw With Nut And Spacer for?

• Hunters and target shooters modifying synthetic stocks — requires a machine screw swivel stud with a 7/8-inch (22.2 mm) shank and 10-32 backing nut to secure sling swivels or Harris-style bipods through hollow synthetic forends on popular bolt-action rifles.
• Gunsmiths repairing forend mounting points — relies on a 10-32 machine thread pitch and a 7/8-inch length to replace stripped factory studs or install structurally reinforced anchors through thin-walled rifle stocks.

Less suitable for: Thicker solid-wood buttstocks or forends without internal cavity access; wood-screw type studs or shorter 1/4-inch machine studs suit these solid installations better than this 7/8-inch through-bolt variant.