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. 

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
Intertek CCRR-0387 Report | PDF

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
Intertek CCRR-0387 Report | PDF

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
Intertek CCRR-0387 Report | PDF

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

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

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

#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
Intertek CCRR-0347 Report | PDF

#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
Intertek CCRR-0347 Report | PDF

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
Intertek CCRR-0347 Report | PDF

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
Intertek CCRR-0347 Report | PDF
Contact us at 1-610-790-2629 to place your order or discuss a custom solution for your curtain wall fastening needs.  
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