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NGP 8424DKB Thermal Break Saddle Threshold 4-1/8" Wide x 1/2" High | Dark Bronze
The National Guard Products NGP 8424DKB is a commercial-grade thermal break saddle threshold, 4-1/8" wide by 1/2" high, extruded from 6063-T5 aluminum with a rigid thermoplastic thermal barrier that separates the interior and exterior aluminum to block thermal transfer, condensation, and frost at the opening - ideal for exterior doors in demanding climates.
ADA-Compliant, Barrier-Free Design
At just 1/2" high, the NGP 8424DKB provides an ADA-compliant transition that meets the ADA Standard for Accessible Design and ICC/ANSI A117.1.
Fire-Rated & Positive-Pressure Certified
The NGP 8424DKB is UL certified to CAN/ULC-S104 and ANSI/UL10B, and positive-pressure certified to ANSI/UL10C - complying with NFPA 80 and NFPA 252 for hollow metal fire doors rated up to 3 hours and wood fire doors rated up to 90 minutes.
BHMA Certified & Load Tested
Certified to ANSI/BHMA A156.21 with a 1,000 lb. load test and listed in the BHMA Certified Products Directory - built for high-traffic commercial entryways.
Technical Specifications
| Model | NGP 8424DKB |
| Type | Thermal Break Saddle Threshold |
| Width | 4-1/8" |
| Height | 1/2" |
| Material | Extruded Aluminum Alloy 6063, T5 Temper |
| Finish | Dark Bronze |
| Wall Thickness | 0.110" |
| Weight | 0.75 lbs./ft. |
| Fasteners | #10 x 1-1/2" FH Zinc Plated Wood Screws (included) |
| Available Lengths | 36", 48", 72" |
| Certifications | ADA, ANSI/BHMA A156.21, UL10B, UL10C (positive pressure) |
Ordering & Lead Time
Made to order (not stocked). Lead time: 5-7 business days.
| Length | 36 Inch or 48 Inch or 72 Inch |
| Brand | National Guard Products |
| Threshold Grade | Commercial- Standard |
| Threshold Type | Thermal Barrier |
| Threshold Width | 4-1/8" |
| Threshold Height | 1/2" |
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