Key drive thumbscrews have the socket head cap screw cold-formed through the top of the knob, allowing for adjustment using a hex key.
Key drive thumbscrews are currently only available in measurements of inch.
If ordering key drive thumbscrews with zinc plated screws, please contact us for availability.
Dimension Drawing PDFs




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wdt_ID | Part # | Thread | Length | Hex Size | Style | Color | Screw Material | Head Dia ( A ) | Head Height ( B ) |
---|---|---|---|---|---|---|---|---|---|
1 | K99B-0440-0.28A | 4 - 40 | 9/32" | 3/32" | Knurled | Black | Black Alloy Screw | 5/16" | 11/64" |
2 | K99B-0440-0.28S | 4 - 40 | 9/32" | 3/32" | Knurled | Black | Stainless, 18-8 Screw | 5/16" | 11/64" |
3 | K99B-0440-0.28Z | 4 - 40 | 9/32" | 3/32" | Knurled | Black | Zinc Plated | 5/16" | 11/64" |
4 | K99B-0440-0.40A | 4 - 40 | 13/32" | 3/32" | Knurled | Black | Black Alloy Screw | 5/16" | 11/64" |
5 | K99B-0440-0.40S | 4 - 40 | 13/32" | 3/32" | Knurled | Black | Stainless, 18-8 Screw | 5/16" | 11/64" |
6 | K99B-0440-0.40Z | 4 - 40 | 13/32" | 3/32" | Knurled | Black | Zinc Plated | 5/16" | 11/64" |
7 | K99B-0440-0.53A | 4 - 40 | 17/32" | 3/32" | Knurled | Black | Black Alloy Screw | 5/16" | 11/64" |
8 | K99B-0440-0.53S | 4 - 40 | 17/32" | 3/32" | Knurled | Black | Stainless, 18-8 Screw | 5/16" | 11/64" |
9 | K99B-0440-0.53Z | 4 - 40 | 17/32" | 3/32" | Knurled | Black | Zinc Plated | 5/16" | 11/64" |
10 | K99B-0440-0.65A | 4 - 40 | 21/32" | 3/32" | Knurled | Black | Black Alloy Screw | 5/16" | 11/64" |
11 | K99B-0440-0.65S | 4 - 40 | 21/32" | 3/32" | Knurled | Black | Stainless, 18-8 Screw | 5/16" | 11/64" |
12 | K99B-0440-0.65Z | 4 - 40 | 21/32" | 3/32" | Knurled | Black | Zinc Plated | 5/16" | 11/64" |
13 | K99B-0440-0.78A | 4 - 40 | 25/32" | 3/32" | Knurled | Black | Black Alloy Screw | 5/16" | 11/64" |
14 | K99B-0440-0.78S | 4 - 40 | 25/32" | 3/32" | Knurled | Black | Stainless, 18-8 Screw | 5/16" | 11/64" |
15 | K99B-0440-0.78Z | 4 - 40 | 25/32" | 3/32" | Knurled | Black | Zinc Plated | 5/16" | 11/64" |
16 | K99B-0440-0.90A | 4 - 40 | 29/32" | 3/32" | Knurled | Black | Black Alloy Screw | 5/16" | 11/64" |
17 | K99B-0440-0.90S | 4 - 40 | 29/32" | 3/32" | Knurled | Black | Stainless, 18-8 Screw | 5/16" | 11/64" |
18 | K99B-0440-0.90Z | 4 - 40 | 29/32" | 3/32" | Knurled | Black | Zinc Plated | 5/16" | 11/64" |
19 | K00B-0632-0.28A | 6 - 32 | 9/32" | 7/64" | Knurled | Black | Black Alloy Screw | 3/8" | 3/16" |
20 | K00B-0632-0.28S | 6 - 32 | 9/32" | 7/64" | Knurled | Black | Stainless, 18-8 Screw | 3/8" | 3/16" |
21 | K00B-0632-0.28Z | 6 - 32 | 9/32" | 7/64" | Knurled | Black | Zinc Plated | 3/8" | 3/16" |
22 | K00B-0632-0.40A | 6 - 32 | 13/32" | 7/64" | Knurled | Black | Black Alloy Screw | 3/8" | 3/16" |
23 | K00B-0632-0.40S | 6 - 32 | 13/32" | 7/64" | Knurled | Black | Stainless, 18-8 Screw | 3/8" | 3/16" |
24 | K00B-0632-0.40Z | 6 - 32 | 13/32" | 7/64" | Knurled | Black | Zinc Plated | 3/8" | 3/16" |
25 | K00B-0632-0.53A | 6 - 32 | 17/32" | 7/64" | Knurled | Black | Black Alloy Screw | 3/8" | 3/16" |
Thread | Length | Style | Color | Screw Material |