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Popular Support Pages-> Wood Screws Types Threaded Insert and T-Nut Guide Wood Screw Size Chart PILOT HOLE SIZE CHART
Self Drilling Screws

Self Tapping Screws

They feature a self-drilling tip that drills through the steel; no pre-drilling is needed for sheet metal applications. Make sure you use a slower rpm. and give the self-drilling point time to cut away the steel just like a drill bit. ..   Read More

Self Tapping Points and Metal Thickness

What About Those Point Sizes

Sheet Metal
Thickness Table
Sheet Metal
Thickness Table
Gauge Thickness
12 .1017
14 .0713
16 .0566
18 .0451
20 (Structural) .0346
20 (Drywall) .0312
22 .0283
25 .0188
Source: Steel Stud Manufacturers Association

Self-drilling/self-tapping screws must be matched to the thickness of the material they will fasten to work properly. Unlike fasteners selected by length and diameter, these screws are specified by point size. The self-drilling point must be through the material before the self-tapping begins, so the drill point must be longer than the combined thickness of the materials being fastened. The screw will cross thread if the materials are separated when tapping begins and will cause thread stripping or drive stalling.

Maximum Material Thickness

  • Zinc-Plated #8 Screws with #2 Point .035" to .100"
  • Zinc-Plated #10 Screws with #3 Point .110" to .210"
  • Stainless Steel #8 Screws with #2 Point .059" to .110"
  • Stainless Steel #8 Screws with #3 Point .098" to .142"
  • Stainless Steel #10 Screws with #3 Point .110" to .177"
  • Stainless Steel #12 Screws with #3 Point .110" to .209'
  • Stainless Steel #14 Screws with #3 Point .110" to .248"

Decimal equivalents of Standard Gauges of Sheet Steel and Sheet Aluminum Thickness
Gauge Aluminum Sheet
Steel		 Gauge Aluminum Sheet
Steel
12 0.0808 0.1046 20 0.0320 0.0359
14 0.0641 0.0747 22 0.0253 0.0299
16 0.0508 0.0598 24 0.0201 0.0239
18 0.0403 0.0478 25 0.0179 0.0209

Metal Tapping Screws

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  1. 10 x 1-1/2 in. Big T Metal Roofing Screw, Zinc, Hex Washer, 1/4 in., Drive - Qty:100 SKU: 1014-WBD-C
    $23.01
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  2. 10 x 1-1/2 in. Big T Metal Roofing Screw, Zinc, Hex Washer, 1/4 in., White - Qty:100 SKU: 1014-WBD-C-WHT
    $26.01
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  3. 10 x 1-1/4 in. Self-Drilling,304/305 SS, Pan Head, Square - Qty:100 SKU: 1012-PT5-C
    $33.00
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  4. 8 x 1/2 in. Self-Drilling Metal Screws, Zinc, Hex Head SKU: HL2-0804

    Starting at $7.55

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  5. 8-x 5/8 Self-Drilling Metal Screws, Zinc, Hex Drive - QTY:100 SKU: HL2-0805-C
    $6.95
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  6. 8 x 5/8 Self-Drilling Metal Screws, Zinc, Hex Drive - QTY:1000 SKU: HL2-0805-M
    $32.38
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  7. 8 x 3/4 in. Self-Drilling Metal, Zinc, Hex Head, Hex SKU: HL2-0806

    Starting at $5.05

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  8. 8 x 1 Self-Drilling Metal Screws, Zinc, Hex Drive - QTY:100 SKU: HL2-0810-C
    $9.57
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  9. 8 x 1 Self-Drilling Metal Screws, Zinc, Hex Dr. QTY:1000 SKU: HL2-0810-M
    $38.82
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  10. 8 x 1-1/2 Self-Drilling Metal tip Screws, Zinc SKU: HL2-0814

    Starting at $9.39

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  11. 10-16 x 3/4 in. Self-Drilling Metal, Zinc, Hex Head, Hex - Qty:100 SKU: HL3-1006-C
    $8.55
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  12. 10 x 3/4 in. Self-Drilling Metal, Zinc, Hex Head, Qty:1000 SKU: HL3-1006-M
    $37.57
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  13. 10 x 1 in. Self-Drilling Metal Screws, Zinc, Hex Head, Qty:1000 SKU: HL3-1010-M
    $45.12
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  14. 10-16 x 1 in. in. Self-Drilling Metal, Zinc, Hex Head Qty:100 SKU: HL3-1010-C
    $8.35
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  15. 10-16 x 1-1/4 in. Self-Drilling Metal, Zinc, Hex Head, Hex SKU: HL3-1012

    Starting at $9.05

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  16. 12-14 x 1 inch Self-Drilling Metal Screws, Zinc, Hex Drive QTY:100 SKU: HL3-1210-C
    $10.50
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  17. 12-14 x 1 Self-Drill Metal Screws, Clear Zinc, Hex Drive Qty:1000 SKU: HL3-1210-M
    $59.95
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  18. 12-14 x 1-1/2 in. Self-Drilling Metal, Zinc, Hex Head, Hex - Qty:100 SKU: HL3-1214-C
    $11.20
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  19. 12 x 1-1/2 in. Self-Drilling Metal, clear Zinc, Hex Head, Qty:1000 SKU: HL3-1214-M
    $82.25
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  20. 12-14 x 3/4 in. Self-Drilling Metal, Zinc, Hex Head, Hex SKU: HL3-1206

    Starting at $11.74

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  21. 1/4-14 x 1 in. Self-Drilling Metal, Zinc, Hex Head, Hex - Qty:100 SKU: HL3-1410-C
    $11.99
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  22. 1/4-14 x 1 in. Self-Drilling Metal, Zinc, Hex Head, Hex - Qty:1000 SKU: HL3-1410-M
    $126.20
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  23. 1/4-14 x 1-1/2 in. Self-Drilling Metal, Zinc, Hex Head, Hex - Qty:100 SKU: HL3-1414-C
    $12.89
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  24. 1/4-14 x 1-1/2 Self-Drill Metal, Zinc, Hex Head, Hex, Qty:1000 SKU: HL3-1414-M
    $140.03
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  25. 12 x 1-1/4 in. Hex Washer Head, 304/305 SS, Star - Qty:100 SKU: H53-1212-C
    $49.76
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  26. 12 x 1-1/4 in. Hex Washer Head, 304/305 SS, Star - Qty:1000 SKU: H53-1212-K
    $367.17
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  27. 12 x 1-1/2 in. Hex Washer Head, 304/305 SS, Star - Qty:100 SKU: H53-1214-C
    $52.95
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  28. 12 x 1-1/2 in. Hex Washer Head, 304/305 SS, Star - Qty:1000 SKU: H53-1214-K
    $390.71
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  29. 12 x 2 in. Hex Washer Head, 304/305 SS, Star - Box of 100 - Qty:100 SKU: H53-1220-C
    $68.03
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  30. 12 x 2 in. Hex Washer Head, 304/305 SS, Star - Qty:1000 SKU: H53-1220-K
    $484.80
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  31. 12 x 2-1/2 in. Hex Washer Head, 304/305 SS, Star - Qty:100 SKU: H53-1224-C
    $71.27
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  32. 12 x 2-1/2 in. Hex Washer Head, 304/305 SS, Star - Qty:1000 SKU: H53-1224-K
    $587.65
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  33. 12 x 3 in. Hex Washer Head, 304/305 SS, Star - Qty:100 SKU: H53-1230-C
    $74.85
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  34. 12 x 3 in. Hex Washer Head, 304/305 SS, Star - Qty:1000 SKU: H53-1230-K
    $616.98
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  35. 12 x 2-1/2 in. Hex Washer Head Self-Drilling Metal, 500 SS, Hex - Qty:100 - MEL SKU: H43-1224-C
    $114.66
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  36. 14 x 2 Hex Washer Head Self-Drill Metal, 500 SS, Hex, Qty:100 - EOL SKU: H43-1420-C
    $129.97
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  37. 12 x 1 in. Hex Washer Head, 316 SS, Hex - Qty:1000 SKU: H63-1210-K
    $367.17
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  38. 12 x 2 in. Hex Washer Head, 316 SS, Hex - Qty:1000 SKU: H63-1220-K
    $543.52
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  39. 12 x 3 in. Hex Washer Head, 316 SS, Hex - Qty:1000 SKU: H63-1230-K
    $741.89
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  40. 12 x 4 Inch Hex Washer Head, 316 SS, Hex - Qty:100 SKU: H63-1240-C
    $124.72
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  41. 8 x 1 in. Hex Washer Head, 316 SS, Hex - Qty:100 SKU: H63-0810-C
    $31.83
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    Out of stock
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  42. 12 x 1-1/2 in. Hex Washer Head, 316 SS, Hex - Qty:100 SKU: H63-1214-C
    $69.84
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  43. 12 x 2-1/2 in. Hex Washer Head, 316 SS, Hex - Qty:100 SKU: H63-1224-C
    $89.14
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  44. 12 x 3 in. Hex Washer Head Self-Drilling Metal, 500 SS, Hex - Qty:100 SKU: H43-1230-C
    $118.68
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  45. 14 x 2-1/2 in. Hex Washer Head Self-Drilling Metal, 500 SS, Hex - Qty:100 - MEL SKU: H43-1424-C
    $132.07
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  46. 8 x 1 in. Hex Washer Head, 316 SS, Hex - Qty:1000 SKU: H63-0810-K
    $178.28
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  47. 12 x 1 in. Hex Washer Head, 316 SS, Hex - Qty:100 SKU: H63-1210-C
    $59.79
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  48. 12 x 1-1/2 in. Hex Washer Head screws, 316 SS, Hex - Qty:1000 SKU: H63-1214-K
    $440.96
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  49. 12 x 2 in. Hex Washer Head, 316 SS, Hex - Qty:100 SKU: H63-1220-C
    $75.02
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  50. 12 x 2-1/2 in. Hex Washer Head, 316 SS, Hex - Qty:1000 SKU: H63-1224-K
    $682.79
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