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Curtain wall fasteners


SFS brings a broad assortment of fasteners specially designed for demanding curtain wall applications 


Whether you need to connect dissimilar metals or operate in a high-corrosive environment, we have the curtain wall fasteners strong enough to endure. Our comprehensive range of screws address various applications, and our in-house engineers can customize curtain wall fasteners for unique requirements. 

Flex5 Grade 5 performance fasteners


Intertek Evaluation

Flex5 products are listed on Intertek Evaluation Report CCRR-0347


Product group overview brochure

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#10-16 Flex5

Selectively hardened fastener with Grade 5 performance (RC28-34)

Listed on Intertek Evaluation Report CCRR-0347

  • Self-drill point #3
  • Drill & tap capacity: 0.150"
  • Diameter: #10 with 16 threads per inch
  • Head: 5/16" AF hex washer head
  • Available lengths: 3/4"

Product data sheet | PDF

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#12-14 Flex5

Selectively hardened fastener with Grade 5 performance (RC28-34)

Listed on Intertek Evaluation Report CCRR-0347

  • Self-drill point #3
  • Drill & tap capacity: 0.187"
  • Diameter: #12 with 14 threads per inch
  • Head: 5/16" AF hex washer head
  • Available lengths: 7/8", 1", 1-1/2", 2"

Product data sheet | PDF

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1/4-14 Flex5

Selectively hardened fastener with Grade 5 performance (RC28-34)

Listed on Intertek Evaluation Report CCRR-0347

  • Self-drill point #3
  • Drill & tap capacity: 0.187"
  • Diameter: 1/4" with 14 threads per inch
  • Head: 3/8" AF hex washer head
  • Available lengths: 1", 1-1/2", 2"

Product data sheet | PDF

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1/4-20 Flex5

Selectively hardened fastener with Grade 5 performance (RC28-34)

Listed on Intertek Evaluation Report CCRR-0347

  • Self-drill point #4
  • Drill & tap capacity: 0.312"
  • Diameter: 1/4" with 20 threads per inch
  • Head: 3/8" AF hex washer head
  • Available lengths: 1-1/8", 1-1/2", 2", 2-1/2"

Product data sheet | PDF

Bi-Met 300 fasteners


Intertek Evaluation

1/4" diameter Bi-Met 300 products are listed on Intertek Evaluation Report CCRR-0387


Product group overview brochure

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10-16 SD2 Bi-Met 300®

For light and medium gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

  • 304 stainless (bi-met) with carbon drill point
  • Low hex washer head for ACM/MCM framing
  • Drill capacity: 0.105" (2.7 mm) max
  • Diameter: #10 with 16 threads per inch
  • Head: 5/16" AF hex washer head

Product data sheet | PDF

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12-14 SD3 Bi-Met 300®

For light and medium gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.210" (5.3 mm) max
  • Diameter: #12 with 14 threads per inch
  • Head: 5/16" AF hex washer head

Product data sheet | PDF

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12-24 SD5 Bi-Met 300®

For heavy gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.500" (12.7 mm) max
  • Diameter: #12 with 24 threads per inch
  • Head: 5/16" AF hex washer head

Product data sheet | PDF

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12-14 SD3 Pancake Bi-Met 300®

For light and medium gauge metal connections, curtain wall and building envelope attachment, standing seam clip attachment or dissimilar metal connections

  • 304 stainless (bi-met) with carbon drill point
  • Flat head for visible attachments
  • Drill capacity: 0.210" (5.3 mm) max steel
  • Diameter: #12 with 14 threads per inch
  • Head: Pancake #2 square

Product data sheet | PDF

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1/4-14 SD2 Bi-Met 300®

For light and medium gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

Listed on Intertek Evaluation Report CCRR-0387

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.105" (2.7 mm) max
  • Diameter: 1/4" with 14 threads per inch
  • Head: 3/8" AF hex washer head

Product data sheet | PDF

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1/4-20 SD4 Bi-Met 300®

For heavy gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

Listed on Intertek Evaluation Report CCRR-0387

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.312" (7.9 mm) max
  • Diameter: 1/4" with 20 threads per inch
  • Head: 3/8" AF hex washer head

Product data sheet | PDF

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1/4-20 SD5 Bi-Met 300®

For heavy gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

Listed on Intertek Evaluation Report CCRR-0387

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.500" (12.7 mm) max
  • Diameter: 1/4" with 20 threads per inch
  • Head: 3/8" AF hex washer head

Product data sheet | PDF

SX HWH bi-metal fasteners

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SX3 Stainless Self-Drill

Ideal for light gauge metal to metal

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: .035"–.098" (.88–2.5 mm)
  • For max build up to .787" (20 mm)
  • Diameter: #14 with 11 threads per inch
  • Head: 5/16" AF hex washer head
  • Available with 5/8" stainless bond seal washer

Product data sheet | PDF

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SX5 Stainless Self-Drill

Ideal for medium thickness metal to metal

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: .060"–.157" (1.5–4 mm)
  • Diameter: #12 with 11 threads per inch
  • Head: 5/16" AF hex washer head
  • Available with 5/8" stainless bond seal washer

Product data sheet | PDF

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SX14 Stainless Self-Drill

Ideal for heavy-duty metal to metal

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: .157"–.550" (4–14 mm)
  • For max build up to 2.283" (58 mm)
  • Diameter: #12 with 14 threads per inch
  • Head: 5/16" AF hex washer head
  • Available with 5/8" stainless bond Seal washer

Product data sheet | PDF

Contact us at 1-866-847-5400 to place your order or discuss a custom solution for your curtain wall fastening needs.  

Curtain wall fasteners


SFS brings a broad assortment of fasteners specially designed for demanding curtain wall applications 


Whether you need to connect dissimilar metals or operate in a high-corrosive environment, we have the curtain wall fasteners strong enough to endure. Our comprehensive range of screws address various applications, and our in-house engineers can customize curtain wall fasteners for unique requirements. 

Flex5 Grade 5 performance fasteners


Intertek Evaluation

Flex5 products are listed on Intertek Evaluation Report CCRR-0347


Product group overview brochure

Resizable Image

#10-16 Flex5

Selectively hardened fastener with Grade 5 performance (RC28-34)

Listed on Intertek Evaluation Report CCRR-0347

  • Self-drill point #3
  • Drill & tap capacity: 0.150"
  • Diameter: #10 with 16 threads per inch
  • Head: 5/16" AF hex washer head
  • Available lengths: 3/4"

Product data sheet | PDF

Resizable Image

#12-14 Flex5

Selectively hardened fastener with Grade 5 performance (RC28-34)

Listed on Intertek Evaluation Report CCRR-0347

  • Self-drill point #3
  • Drill & tap capacity: 0.187"
  • Diameter: #12 with 14 threads per inch
  • Head: 5/16" AF hex washer head
  • Available lengths: 7/8", 1", 1-1/2", 2"

Product data sheet | PDF

Resizable Image

1/4-14 Flex5

Selectively hardened fastener with Grade 5 performance (RC28-34)

Listed on Intertek Evaluation Report CCRR-0347

  • Self-drill point #3
  • Drill & tap capacity: 0.187"
  • Diameter: 1/4" with 14 threads per inch
  • Head: 3/8" AF hex washer head
  • Available lengths: 1", 1-1/2", 2"

Product data sheet | PDF

Resizable Image

1/4-20 Flex5

Selectively hardened fastener with Grade 5 performance (RC28-34)

Listed on Intertek Evaluation Report CCRR-0347

  • Self-drill point #4
  • Drill & tap capacity: 0.312"
  • Diameter: 1/4" with 20 threads per inch
  • Head: 3/8" AF hex washer head
  • Available lengths: 1-1/8", 1-1/2", 2", 2-1/2"

Product data sheet | PDF

Bi-Met 300 fasteners


Intertek Evaluation

1/4" diameter Bi-Met 300 products are listed on Intertek Evaluation Report CCRR-0387


Product group overview brochure

Resizable Image

10-16 SD2 Bi-Met 300®

For light and medium gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

  • 304 stainless (bi-met) with carbon drill point
  • Low hex washer head for ACM/MCM framing
  • Drill capacity: 0.105" (2.7 mm) max
  • Diameter: #10 with 16 threads per inch
  • Head: 5/16" AF hex washer head

Product data sheet | PDF

Resizable Image

12-14 SD3 Bi-Met 300®

For light and medium gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.210" (5.3 mm) max
  • Diameter: #12 with 14 threads per inch
  • Head: 5/16" AF hex washer head

Product data sheet | PDF

Resizable Image

12-24 SD5 Bi-Met 300®

For heavy gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.500" (12.7 mm) max
  • Diameter: #12 with 24 threads per inch
  • Head: 5/16" AF hex washer head

Product data sheet | PDF

Resizable Image

12-14 SD3 Pancake Bi-Met 300®

For light and medium gauge metal connections, curtain wall and building envelope attachment, standing seam clip attachment or dissimilar metal connections

  • 304 stainless (bi-met) with carbon drill point
  • Flat head for visible attachments
  • Drill capacity: 0.210" (5.3 mm) max steel
  • Diameter: #12 with 14 threads per inch
  • Head: Pancake #2 square

Product data sheet | PDF

Resizable Image

1/4-14 SD2 Bi-Met 300®

For light and medium gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

Listed on Intertek Evaluation Report CCRR-0387

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.105" (2.7 mm) max
  • Diameter: 1/4" with 14 threads per inch
  • Head: 3/8" AF hex washer head

Product data sheet | PDF

Resizable Image

1/4-20 SD4 Bi-Met 300®

For heavy gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

Listed on Intertek Evaluation Report CCRR-0387

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.312" (7.9 mm) max
  • Diameter: 1/4" with 20 threads per inch
  • Head: 3/8" AF hex washer head

Product data sheet | PDF

Resizable Image

1/4-20 SD5 Bi-Met 300®

For heavy gauge metal connections, curtain wall and building envelope attachment or dissimilar metal connections

Listed on Intertek Evaluation Report CCRR-0387

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: 0.500" (12.7 mm) max
  • Diameter: 1/4" with 20 threads per inch
  • Head: 3/8" AF hex washer head

Product data sheet | PDF

SX HWH bi-metal fasteners

Resizable Image

SX3 Stainless Self-Drill

Ideal for light gauge metal to metal

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: .035"–.098" (.88–2.5 mm)
  • For max build up to .787" (20 mm)
  • Diameter: #14 with 11 threads per inch
  • Head: 5/16" AF hex washer head
  • Available with 5/8" stainless bond seal washer

Product data sheet | PDF

Resizable Image

SX5 Stainless Self-Drill

Ideal for medium thickness metal to metal

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: .060"–.157" (1.5–4 mm)
  • Diameter: #12 with 11 threads per inch
  • Head: 5/16" AF hex washer head
  • Available with 5/8" stainless bond seal washer

Product data sheet | PDF

Resizable Image

SX14 Stainless Self-Drill

Ideal for heavy-duty metal to metal

  • 304 stainless (bi-met) with carbon drill point
  • Drill capacity: .157"–.550" (4–14 mm)
  • For max build up to 2.283" (58 mm)
  • Diameter: #12 with 14 threads per inch
  • Head: 5/16" AF hex washer head
  • Available with 5/8" stainless bond Seal washer

Product data sheet | PDF

Contact us at 1-866-847-5400 to place your order or discuss a custom solution for your curtain wall fastening needs. Â