DeWALT Drilit® Extended-Capacity Self-Drilling Metal Screws (Hex Washer) | Stalgard® | #12-24 & 1/4-20 | TEK 5

Drilit® self-drilling fasteners eliminate separate drilling and tapping for faster, more economical installations. This Extended Drilling Capacity variant uses higher-capacity drill points (#5) to penetrate thicker steel in a single pass. A hex washer head provides a stable bearing surface and positive drive, while Stalgard® / Gray Stalgard® finishes deliver proven corrosion resistance (ASTM B117 ~1,000 hours). Select sizes are offered with EPDM bonded sealing washers for weather-tight exterior assemblies.

Key Features

• Extended drilling capacity: high-number drill points (#5) bite quickly and drive through thicker steel in one pass
• Self-drilling/tapping design: reduces steps, labor, and tool changes
• Hex washer head: strong wrenching flats and consistent seating under load
• Corrosion protection: Stalgard® / Gray Stalgard® finishes; Gray Stalgard® compatible with ACQ lumber ≤ 0.25 pcf
• Weather-seal option: EPDM bonded sealing washer available on select sizes
• Code & testing: ICC-ES family reports (ESR-3294, ESR-4367); tested per AC118 (steel-to-steel) and AC500 (misc. materials to steel)

Applications

• Steel-to-steel connections
• Wood-to-steel connections
• Composite material-to-steel connections

Available Head Styles

• Hex Washer Head (Extended Drilling Capacity) — this page
• Hex Washer Head with EPDM Bonded Sealing Washer (select sizes)

Drill Point Types

• #5 (match point to base-material thickness and the size chart’s load-bearing guidance)

Screw Sizes & Thread Options

• Diameters: #12-24, 1/4″-20
• Thread counts: 24 TPI (#12-24), 20 TPI (1/4″-20)
• Length range: 7/8″ to 8″ (per catalog)
• Typical drive sizes: 5/16″ (most #12 and shorter 1/4″), 3/8″ (long 1/4″: 5″–8″)
• Representative geometry (from spec table):
  - #12 head: Ø 0.415″, height 0.185″, drive 5/16″
  - Long 1/4″ head: Ø 0.595″, height 0.23″, drive 3/8″
• Load/protrusion guidance (varies by SKU): Max load-bearing length up to 6.938″ and minimum protrusion 5/8″–1-1/16″ (see individual items).

Type: Self-drilling structural screws; extended-capacity points #5 for thicker steel

Head / Drive: Hex washer head; typical drives 5/16″ (#12, short 1/4″) and 3/8″ (long 1/4″)

Sizes: #12-24 and 1/4″-20; lengths 7/8″–8″

Head dimensions (typical): #12 head Ø 0.415″ × 0.185″ H; long 1/4″ head Ø 0.595″ × 0.23″ H (from your table)

Finish: Stalgard® (silver/gray options); corrosion-resistant, ICC-ES family approvals

Representative sizes — pack & weight

• DFSECC720 — #12-24 × 1-1/4″, #5 point, 5/16″ hex, Stalgard® — Full Case qty 4,000 — 44.0 lb, case. 
• DFSECC740 — #12-24 × 1-1/2″, #5 point, 5/16″ hex, Stalgard® — Full Case qty 2,500 — 40.0 lb, case. 
• DFSECC750 — #12-24 × 2″, #5 point, 5/16″ hex, Stalgard® — Full Case qty 2,000 —        34.0 lb, case. 
• DFSECC960 — 1/4″-20 × 5″, #5 point, 3/8″ hex, Stalgard® — Full Case qty 500 —            31.5 lb, case. 
• DFSECC970 — 1/4″-20 × 6″, #5 point, 3/8″ hex, Stalgard® — Full Case qty 500—             37.0 lb, case. 
• DFSECC940 — 1/4″-20 × 3″, #5 point, 5/16″ hex, Stalgard® — Full Case qty 100 —          3.6 lb, case

Note: Dimensions (head Ø/height, drive, point, load-bearing/protrusion) match your spec table; weights are published box weights and can vary by supplier or pack size.

Q: What does “Extended Drilling Capacity” mean?
A: These Drilit® screws use higher-capacity drill points (#5) to penetrate thicker steel in one pass, eliminating separate drilling and tapping.

Q: Which sizes and drives are available?
A: Thread forms #12-24 and 1/4-20 in lengths from 7/8″ up to 8″. Most #12 and short 1/4″ sizes use a 5/16″ hex; longer 1/4″ (5″–8″) use a 3/8″ hex.

Q: How do I choose between #4, #4.5, and #5 point types?
A: Match the point to base-material thickness: #4 for moderate, #4.5 for medium-thick, #5 for thicker steel. Verify each SKU’s Max Load Bearing Length and required Min Protrusion Length in the size chart.

Q: Are these fasteners corrosion-resistant?
A: Yes — Stalgard® / Gray Stalgard® finishes deliver proven salt-spray performance. For exterior/weather-exposed assemblies, choose versions with an EPDM bonded sealing washer where offered.

Q: Are they code-recognized?
A: Yes — part of the Drilit® family covered by ICC-ES reports (e.g., ESR-3294, ESR-4367) and tested per AC118 (steel-to-steel) and AC500 (misc. materials to steel).

Q: What applications are they designed for?
A: Steel-to-steel, wood-to-steel, and composite-to-steel connections where fast, one-pass drilling is needed.

Q: What are typical head dimensions?
A: #12 head approx. Ø 0.415″ × 0.185″ H; long 1/4″ head approx. Ø 0.595″ × 0.23″ H (see item table for exact values by SKU).