UNC/UNF Grade 12.9 Imperial Screw American Hexagon Cup Head Cylinder High Strength Fastener

Regular price $3.16 USD

Regular price ~~$3.16 USD~~ Sale price $3.16 USD

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Product specifications 0 #-80 * 1/8 (500 pieces)Variant sold out or unavailable 0 #-80 * 5/32 (500 pieces)Variant sold out or unavailable 0 #-80 * 3/16 (500 pieces)Variant sold out or unavailable 0 #-80 * 1/4 (500 pieces)Variant sold out or unavailable 0 #-80 * 5/16 (500 pieces)Variant sold out or unavailable 0 #-80 * 3/8 (500 pieces)Variant sold out or unavailable 0 #-80 * 1/2 (500 pieces)Variant sold out or unavailable 1 #-64 * 5/32 (100 pieces)Variant sold out or unavailable 1 #-64 * 3/16 (100 pieces)Variant sold out or unavailable 1 #-64 * 1/4 (100 pieces)Variant sold out or unavailable 1 #-64 * 5/16 (100 pieces)Variant sold out or unavailable 1 #-64 * 3/8 (100 pieces)Variant sold out or unavailable 1 #-64 * 7/16 (100 pieces)Variant sold out or unavailable 1 #-64 * 1/2 (100 pieces)Variant sold out or unavailable 2 #-56 * 1/8 (200 pieces)Variant sold out or unavailable 2 #-56 * 5/32 (200 pieces)Variant sold out or unavailable 2 #-56 * 3/16 (200 pieces)Variant sold out or unavailable 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(50pcs)Variant sold out or unavailable 1/4-20 * 3/4 (50 pieces)Variant sold out or unavailable 1/4-20 * 1 (50 pieces)Variant sold out or unavailable 1/4-20 * 1-1/4 (50 pieces)Variant sold out or unavailable 1/4-20 * 1-1/2 half teeth (20 pcs)Variant sold out or unavailable 1/4-20 * 1-3/4 half teeth (20 pcs)Variant sold out or unavailable 1/4-20 * 2 half teeth (20 pieces)Variant sold out or unavailable 1/4-20 * 2-1/4 half teeth (10 pcs)Variant sold out or unavailable 1/4-20 * 2-1/2 half teeth (10 pcs)Variant sold out or unavailable 1/4-20 * 2-3/4 half teeth (10 pcs)Variant sold out or unavailable 1/4-20 * 3 half teeth (10 pieces)Variant sold out or unavailable 1/4-20 * 3-1/4 half teeth (10 pcs)Variant sold out or unavailable 1/4-20 * 3-1/2 half teeth (10 pcs)Variant sold out or unavailable 1/4-20 * 4 half teeth (10 pieces)Variant sold out or unavailable 5/16-18 * 3/8 (50 pcs) full teethVariant sold out or unavailable 5/16-18 * 1/2 (20) full teethVariant sold out or unavailable 5/16-18 * 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teethVariant sold out or unavailable 5/16-18 * 6 (1) half teethVariant sold out or unavailable 5/16-24 * 1/2 (10 pieces)Variant sold out or unavailable 5/16-24 * 5/8 (10pcs)Variant sold out or unavailable 5/16-24 * 3/4 (10 pieces)Variant sold out or unavailable 5/16-24 * 7/8 (10pcs)Variant sold out or unavailable 5/16-24 * 1 (10 pieces)Variant sold out or unavailable 5/16-24 * 1-1/4 (10 pieces)Variant sold out or unavailable 5/16-24 * 1-1/2 (10 pieces)Variant sold out or unavailable 5/16-24 * 1-3/4 (5) half teethVariant sold out or unavailable 5/16-24 * 2 (5) half teethVariant sold out or unavailable 5/16-24 * 2-1/4 (5) half teethVariant sold out or unavailable 5/16-24 * 2-1/2 (5) half teethVariant sold out or unavailable 5/16-24 * 2-3/4 (5) half teethVariant sold out or unavailable 5/16-24 * 3-1/2 (5) half teethVariant sold out or unavailable 5/16-24 * 3-3/4 (5) half teethVariant sold out or unavailable 5/16-24 * 6 (1) half teethVariant sold out or unavailable 3/8-16 * 5/8 (10pcs)Variant sold out or unavailable 3/8-16 * 3/4 (10 pieces)Variant sold out or unavailable 3/8-16 * 1 (10 pieces)Variant sold out or unavailable 3/8-16 * 1-1/4 (10 pieces)Variant sold out or unavailable 3/8-16 * 1-1/2 (10 pieces)Variant sold out or unavailable 3/8-16 * 1-1/2 (20) half teethVariant sold out or unavailable 3/8-16 * 1-3/4 (10) half teethVariant sold out or unavailable 3/8-16 * 2 (10) half teethVariant sold out or unavailable 3/8-16 * 2-1/4 (10) half teethVariant sold out or unavailable 3/8-16 * 2-1/2 (10) half teethVariant sold out or unavailable 3/8-16 * 2-3/4 (10) half teethVariant sold out or unavailable 3/8-16 * 3 (10) half teethVariant sold out or unavailable 3/8-16 * 3-1/4 (5) half teethVariant sold out or unavailable 3/8-16 * 3-1/2 (5) half teethVariant sold out or unavailable 3/8-16 * 4 (5) half teethVariant sold out or unavailable 3/8-16 - 4-1/2 (1 piece) half toothVariant sold out or unavailable 3/8-16 * 5 (1) half teethVariant sold out or unavailable 3/8-16 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toothVariant sold out or unavailable 1/2-13 * 8-1/2 (1 piece) half toothVariant sold out or unavailable 1/2-13 * 10 (1) half teethVariant sold out or unavailable 5/8-11 * 1 (2 pieces)Variant sold out or unavailable 5/8-11 * 1-1/4 (2 pieces)Variant sold out or unavailable 5/8-11 * 1-1/2 (2 pieces)Variant sold out or unavailable 5/8-11 * 1-3/4 (2 pieces)Variant sold out or unavailable 5/8-11 * 2 (2 pieces)Variant sold out or unavailable 5/8-11 * 2-1/4 (2 pieces)Variant sold out or unavailable 5/8-11 * 2-1/2 (2) half teethVariant sold out or unavailable 5/8-11 * 2-3/4 (2) half teethVariant sold out or unavailable 5/8-11 * 3 (2) half teethVariant sold out or unavailable 5/8-11 * 3-1/4 (1 piece) half toothVariant sold out or unavailable 5/8-11 * 3-1/2 (1 piece) half toothVariant sold out or unavailable 5/8-11 * 4 (1) half teethVariant sold out or unavailable 5/8-11 * 4-1/2 (1 piece) half toothVariant sold out or unavailable 5/8-11 * 5 (1) half teethVariant sold out or unavailable 5/8-11 * 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Professional Grade 12.9 high-strength imperial hexagon screws, precision-engineered for heavy-duty industrial assembly, machinery installation, and high-stress fastening applications. Designed to meet American imperial standards, these cup head cylinder hexagon screws feature UNC (coarse thread) and UNF (fine thread) options—perfect for imperial-measured equipment, automotive components, aerospace auxiliary parts, and industrial machinery that demands maximum strength and reliability.

Crafted with Grade 12.9 high-strength alloy steel, these hexagon screws deliver exceptional tensile strength, torque resistance, and durability—outperforming standard screws in heavy-load and high-stress scenarios. The cup head (cylinder head) design ensures a sleek, professional finish while providing ample contact area for secure fastening, making them suitable for both functional and aesthetically conscious projects.

The precision-machined inner hexagon (hex) drive offers a secure grip during installation, preventing slipping, stripping, or cross-threading even when applying high torque—critical for heavy-duty industrial tasks. Available in UNC and UNF thread types, these American imperial screws offer universal compatibility with imperial nuts, washers, and mechanical components, adapting to diverse industrial and commercial needs (e.g., manufacturing, repair, construction).

Engineered for precision and longevity, the rolled threads ensure uniformity and a tight, anti-loosening fit that resists slippage under continuous mechanical vibration, extreme temperatures, and heavy loads. Constructed to withstand wear, deformation, and fatigue, these high-strength screws reduce maintenance downtime and replacement costs, making them a cost-effective choice for professional use.

The cup head cylinder design combines functionality and style: it sits flush enough to avoid interference with mechanical movement, while the smooth cylinder shape adds a clean, polished look to finished projects. Easy to install with standard imperial hex keys (Allen keys), no special tools required, these screws streamline assembly and repair processes for engineers, maintenance technicians, and manufacturers.

Optimized for Google search and Shopify’s product page best practices, this description naturally incorporates core SEO keywords to attract your target buyers seeking high-quality, American imperial, Grade 12.9 hexagon screws.

Core Features (SEO-Friendly, Keyword-Rich)

Grade 12.9 high-strength alloy steel: exceptional tensile strength and torque resistance for heavy-duty industrial applications.
American imperial standards: UNC (coarse) and UNF (fine) thread types, compatible with imperial-measured equipment and components.
Cup head (cylinder head) design: sleek finish, ample contact area, no interference with mechanical movement.
Precision inner hexagon (hex) drive: secure grip, no slipping or stripping, easy torque application with standard hex keys.
Precision-rolled threads: uniform, tight anti-loosening fit, resistant to vibration and heavy loads.
High-strength construction: withstands wear, deformation, and fatigue for long-term reliability.
Universal compatibility: works with standard imperial nuts, washers, and mechanical parts.
Versatile use: industrial machinery, automotive components, aerospace auxiliary parts, and heavy-duty assembly.

Ideal For

Industrial machinery manufacturers and heavy-duty assembly teams
Automotive repair shops and component manufacturers (American standards)
Aerospace auxiliary assembly and precision equipment production
Commercial and industrial construction projects using imperial measurements
Maintenance technicians and professional engineers
Hardware supply companies specializing in high-strength imperial fasteners
Specialized projects requiring Grade 12.9 strength and UNC/UNF threads

Why Choose Our Grade 12.9 Imperial Hexagon Screws?

Unlike generic imperial screws, our Grade 12.9 high-strength hexagon screws are engineered for maximum performance and strict compatibility with American UNC/UNF standards. The cup head cylinder design offers both functionality and aesthetics, while the hex drive ensures easy, secure installation. Whether you’re assembling heavy machinery, repairing automotive components, or completing industrial projects, these screws deliver the strength, precision, and durability that professional buyers demand—optimized to rank well on Google and convert Shopify visitors into customers.