The GrovTec ¼" Machine Screw Swivel Studs (Model GTHM59) provide a bolt-through anchoring point for slings and Harris-style bipods on synthetic, fiberglass, and composite firearm stocks. Manufactured in the USA from precision-machined steel with a black oxide finish, each stud features a 0.25-inch shank with a standard 10-32 machine screw thread. By passing through pre-drilled stock walls and fastening from the interior with the included 10-32 threaded nuts, these studs deliver high shear and pull strength without the risk of thread-stripping associated with coarse wood screws in thin-walled forends.

Key Features

• Bolt-Through Fastening: Installs through thin stock forends and secures internally with a 10-32 nut to prevent pull-out under heavy tension.
• Standard Accessory Interface: Compatible with standard Uncle Mike's and Harris-pattern locking sling swivels, quick-detach loops, and bipod clamp mounts.
• All-Steel Construction: Precision-machined steel treated with a protective black oxide finish for field durability.
• Workshop Bulk Pack: Supplied as a 12-piece pack complete with 12 matching 10-32 nuts for multiple stock builds or workshop refits.
• High Load Rating: Engineered as part of GrovTec's swivel systems pull-tested to withstand up to 300 lbs (approximately 136 kg) of tension.

Product Specifications

• Brand: GrovTec US, Inc.
• Model Number: GTHM59
• Material: Machined steel
• Finish: Black oxide
• Thread Length / Shank Size: 0.25 inch (¼")
• Thread Pitch: 10-32 machine screw
• Pack Quantity: 12 studs and 12 nuts
• Tension Rating: Tested up to 300 lbs (~136 kg)
• Country of Origin: USA

Who is the GrovTec ¼" Machine Screws - 12 Pack for?

• Gunsmiths and Armourers — Equips commercial workshops with a 12-piece bulk pack of firearm sling swivel studs and matching nuts to complete multiple rifle modifications and hardware replacements efficiently.
• Shooters Modifying Synthetic Stocks — Provides bolt-through security using a 0.25-inch shank and 10-32 machine thread rated to 300 lbs of tension for mounting bipods and slings to thin-walled composite forends.

Less suitable for: Firearm forends or stock walls thicker than 0.25 inch, which require longer shank machine screws (such as 0.5-inch or 0.875-inch variants), or solid wood buttstocks lacking internal nut access, which require coarse wood-thread swivel studs.