Best Insulation Screws in 2026

Dimensions: Height .625" - Head Width .625" - Shaft .265" - Length 4" - Use with T30 Torx Bit

Bronzed Coated Exterior - Prevents Rust and Corrosion - ACQ Lumber Compatible

Type 17 Notched Extra Sharp Point for Quick Starts without "Walking", Reduces Need for Pre-Drilling

High Performance Exterior Coated Torx/Star Drive Wood Screws (1 pound (Approx. 32 screws))

Self-Countersinking Nibs & Drag Reducing Knurled Shoulder for a Cleaner & Easier Installation

Quality Wood Screws. ACQ Compatible with Treated Lumber, Outstanding Abrasion Resistant.

Twenty (20) 1/4-20 Thread x 1/2 (half) inch length thread thumbscrews.

1 Inch Plastic Knurled Head

1/2 Inch Long 1/4-20 Threaded Alloy Screw

Standard Thread Size: M6 (1mm Pitch); Thread Length: 20mm / 0.79"; Knurled Head Diameter: 21mm / 0.83"; Total Height: 33mm / 1.3"

Safe and secure knurled thumb screws for the ultimate in adjusting and tightening control. The screws are neat and clear, the force is even, and it is not easy to slip.

Tightly -in plated carbon steel metal insert ensures optimal durability and functionality, easy to install. Great for saw, drill press, lathe and routing jigs, packaging machinery, printing equipment, woodworking machinery and equipment.

Product Name: Countersunk Bolts;Material: 12.9 Alloy Steel

Thread Dia: 2.5mm / M2.5; Thread Length: 5mm / 0.2"; Head Dia: 4.7mm / 0.19"

Fit Hex Key Size: 2mm;Head Type: Pan Head

8 Set, 8pcs thumb screws M6*30 + 8pcs washers M6*12 +8pcs Nuts M6; Plum head diameter is 32mm, thread is M6*30 (D*L); Washer size is M6*12*0.15; Nut size is M6.

Plum head is made of high quality plastic, good toughness and impact resistance, anti-corrosion and anti-aging, can be used for many years.

Screw, washer, nut are all made of high grade iron, zinc plated surface, high hardness, greatly enhancing the ability of anti-corrosion and anti-rust.

Standard Thread Size: M6 (1mm Pitch); Thread Length: 10mm / 0.39"; Knurled Head Diameter: 21mm / 0.83"; Total Height: 23mm / 0.9"

Safe and secure knurled thumb screws for the ultimate in adjusting and tightening control. The screws are neat and clear, the force is even, and it is not easy to slip.

Tightly -in plated carbon steel metal insert ensures optimal durability and functionality, easy to install. Great for saw, drill press, lathe and routing jigs, packaging machinery, printing equipment, woodworking machinery and equipment.

Standard Thread Size: M5 (0.8mm Pitch); Thread Length: 10mm / 0.39"; Knurled Head Diameter: 15mm / 0.59"; Total Height: 20mm / 0.79"

Safe and secure knurled thumb screws for the ultimate in adjusting and tightening control. The screws are neat and clear, the force is even, and it is not easy to slip.

Tightly -in plated carbon steel metal insert ensures optimal durability and functionality, easy to install. Great for saw, drill press, lathe and routing jigs, packaging machinery, printing equipment, woodworking machinery and equipment.

Standard Thread Size: M5 (0.8mm Pitch); Thread Length: 30mm / 1.18"; Knurled Head Diameter: 21mm / 0.83"; Total Height: 44mm / 1.73"

Safe and secure knurled thumb screws for the ultimate in adjusting and tightening control. The screws are neat and clear, the force is even, and it is not easy to slip.

Tightly -in plated carbon steel metal insert ensures optimal durability and functionality, easy to install. Great for saw, drill press, lathe and routing jigs, packaging machinery, printing equipment, woodworking machinery and equipment.

Thread Size: M6 x 25mm/ M6 x 1" (D*L); Total Length: 37.5mm / 1.47"

Weight: 92g; Product Name: Thumb Screw

Material: Metal; Package Content: 4pcs x Knurled Thumb Screw

Material: Carbon Steel + ABS.

Total height: 21 mm/0.82 inch; Head Diameter: 14mm/0.55in;

Male Thread Diameter: M4; Male Thread Length: 10mm / 0.39".

4" Heavy Duty Structural Ledger Board Screws - Exterior Coated (50 Count) Structural Screws

Our Structural Wood Screws Have Drag Reducing Knurled Shoulders for Easier Installation

These Screws Have a 5/8" Washer Head and a 5/16" Hex Head for More Torque and Easy Installation

Drive Type: Hex Socket; Head Style: Socket Cap Head; Material: Stainless Steel

Package Content: 50(+/-2%)Sets x Hex Socket Cap Screws; Product Name: Hex Socket Cap Screws; Thread Size: M3x22mm/0.12"x0.9"(D*L)

Weight: 89g; Fastener Type: Socket Screw; Main Color: Silver Tone

Drive Type: Hex Socket; Head Style: Hex Head; Material: 14.9 Alloy Steel

Package Content: 50pcs x Hex Socket Cap Screw; Product Name: Hex Socket Cap Screw; Thread Size: M2 x 15mm/0.08" x 0.6"(D*L)

Weight: 18g; Main Color: Black; Thread Pitch: 0.4mm

Head Style: Round Knurled Head; Material: Carbon Steel; Package Content: 5 x Knurled Thumb Screws

Product Name: Knurled Thumb Screws; Thread Size: M6 x 12mm/ 0.24" x 0.47" (D*L); Weight: 97g

Coating: Galvanized/Zinc Plated; Main Color: Silver Tone

PRODUCT DIMENSION---6 PCS x T type Clamping Handle Knob. Head Diameter: 36mm/1.42" ; Thread Length: 30mm/1.18" ; Thread Diameter: 6mm/0.24" ; Total Height: 48mm/1.89"

HIGH-QUALITY MATERIAL---These knob replacement parts are made of ABS plastic carbon steel galvanization surface, anti-corrosion and anti-rust. scratch and dirt resistant. Wear-resistant and corrosion-resistant, anti-aging, can be used for many years.

EASY TO USE---Easy to install and remove without any other tools. T shaped knurled head shaped knurled head fastening, locking, adjusting effect. Can be used repeatedly Male threaded knobs has smooth surface, complete and precise workmanship. Screw on type design for easy install and with surface nice finish for comfortable grip.

Package included: 5pcs knurled thumbscrews M3x20mm.

The product is made of 304 stainless steel with a smooth surface.

Suitable for needs that require high appearance, with rust resistance and long service life.

The structure is sturdy and durable and not easily deformed.

Made of metal material, with high hardness, etc.

Easy to install, great for industrial projects and things that require quick adjustments.

The larger the diameter of the thumb portion, the greater the clamping force that can be applied

Material :Made of Stainless Steel, this thumb screw Knob is good for needs requiring high appearance, rust resistance, good wear resistance, well fastening function and long-lasting service than other material

Applications - Applied in home appliances, communications industry, automotive industry, etc.