#11 x 1-1/4" Knob Screw

#11 x 1-1/4" Knob Screw — Heavy-Duty Truss Head Fastener for Large Hardware and Fixtures

The #11 x 1-1/4" Knob Screw is engineered for high-strength fastening in robust cabinetry, furniture assembly, and heavy-duty mounting applications. Its truss head design distributes load and provides a clean, low-profile finish, while the coarse thread ensures strong holding power in wood and composite materials. Zinc-plated for superior corrosion resistance, this screw is a reliable choice for projects that demand both performance and durability in various interior and outdoor environments.

Key Features

• Coarse thread delivers excellent grip and holding force for heavy loads
• Truss head provides broad bearing surface and a sleek, finished appearance
• 1-1/4" (31.75 mm) length handles deep panel or thick hardware stackups
• Manufactured from steel with a zinc-plated finish for rust prevention
• Right-hand thread direction fits most standard hardware mounting requirements
• Phillips drive for easy, slip-free installation with common hand or power tools
• Bulk packs available for commercial, workshop, or larger project needs

Specifications

• Screw Type: #11 x 1-1/4" wood/knob screw
• Length: 1-1/4" (31.75 mm)
• Major Thread Diameter: 0.203" (5.16 mm) [rounded from 0.191"/4.85mm stated by some suppliers, but industry standards list #11 at 0.203"]
• Head Shape: Truss head
• Drive Type: Phillips
• Material: Steel
• Finish: Zinc plated
• Thread Type: Coarse, right-hand
• Available Pack Sizes: 25, 100, 500, bulk options
• ANSI/ASME compliant for fastener quality and fit

Suggested Uses

Ideal for securing large wood or composite cabinet knobs, pulls, or handles in furniture and millwork; assembling heavy-duty drawers, storage chests, or built-in shelving; and for projects where maximum clamping power and security are required. Often preferred for mounting oversized accent hardware, outdoor benches, or fixtures in high-traffic or load-bearing environments. Its robustness suits professional shops, new construction, or heavy DIY renovations where reliability is paramount[77][76].

Frequently Asked Questions

• Is this screw compatible with most wood cabinet or furniture knobs?
  Yes, for any knob or pull designed for a #11 wood-size screw and sized to accept a 0.203" (5.16 mm) diameter thread.
• Will it fit metal hardware inserts?
  #11 is most common for direct wood-mount hardware; check insert diameter if attaching to metal-threaded fittings.
• Is the screw suitable for outdoor furniture?
  The zinc plating delivers good resistance to corrosion for most covered outdoor applications. For marine or direct weather use, consider stainless steel.
• How much weight can this screw support?
  The coarse thread provides substantial holding power; actual weight rating depends on wood substrate and installation quality.
• Are screws provided with knobs or purchased separately?
  These screws are often sold separately; check your knob supplier’s recommendations for the correct hardware size.
• Can these be used for particle board or MDF?
  Yes, the coarse threading is well-suited for firm grip in engineered wood products as well as hardwoods.
• Are bulk or quantity discounts available?
  Bulk pack options are routine, supporting efficient outfitting for contractors, manufacturing, or schools.
• What if I need a different length?
  #11 truss head screws are manufactured in various lengths—choose based on your project’s required thickness and hardware style.

Rely on the #11 x 1-1/4" knob screw for stable fastening, easy installation, and long-term performance—perfect for heavy furniture, hardware upgrades, and construction where durability and holding strength are essential.