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Steel Pan Head Phillips Screws with External-Tooth Lock Washer
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Sharp external teeth provide a stronger grip than internal-tooth lock washers during frequent vibration. These screws are less likely to come loose, but the teeth may snag on surrounding objects. Also known as Sems screws, the washer rotates freely but is permanently attached. These screws have a moderate height and width profile, offering a middle ground between narrower button heads and wider truss heads. The Phillips drive easily aligns with drivers and withstands more torque than slotted drives, but drivers slip when you apply too much force.
Length is measured from under the head.
Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.
Head | Washer | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Dia. | Ht. | OD | Thk. | Threading | Tensile Strength | Specs. Met | Pkg. Qty. | Pkg. | |||
Zinc-Plated Steel | ||||||||||||
4-40 | ||||||||||||
| 3/16" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A104 | 00000 | ||
| 1/4" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A106 | 0000 | ||
| 5/16" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A107 | 00000 | ||
| 3/8" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A108 | 0000 | ||
| 7/16" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A109 | 00000 | ||
| 1/2" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A110 | 0000 | ||
| 5/8" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A112 | 00000 | ||
| 3/4" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A114 | 00000 | ||
| 7/8" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A117 | 0000 | ||
| 1" | 0.219" | 0.08" | 0.23" | 0.018" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A120 | 0000 | ||
6-32 | ||||||||||||
| 3/16" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A142 | 0000 | ||
| 1/4" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A144 | 0000 | ||
| 5/16" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A145 | 0000 | ||
| 3/8" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A146 | 0000 | ||
| 7/16" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A149 | 0000 | ||
| 1/2" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A148 | 0000 | ||
| 5/8" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A150 | 00000 | ||
| 3/4" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A151 | 00000 | ||
| 7/8" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A152 | 00000 | ||
| 1" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A153 | 00000 | ||
| 1 1/4" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A155 | 00000 | ||
| 1 1/2" | 0.27" | 0.097" | 0.285" | 0.02" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A158 | 00000 | ||
8-32 | ||||||||||||
| 1/4" | 0.322" | 0.115" | 0.32" | 0.023" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A190 | 0000 | ||
| 5/16" | 0.322" | 0.115" | 0.32" | 0.023" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A191 | 00000 | ||
| 3/8" | 0.322" | 0.115" | 0.32" | 0.023" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A192 | 0000 | ||
| 7/16" | 0.322" | 0.115" | 0.32" | 0.023" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A195 | 00000 | ||
| 1/2" | 0.322" | 0.115" | 0.32" | 0.023" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A194 | 0000 | ||
| 5/8" | 0.322" | 0.115" | 0.32" | 0.023" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A196 | 00000 | ||
| 3/4" | 0.322" | 0.115" | 0.32" | 0.023" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A197 | 00000 | ||
| 1" | 0.322" | 0.115" | 0.32" | 0.023" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A200 | 0000 | ||
| 1 1/4" | 0.322" | 0.115" | 0.32" | 0.023" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A201 | 00000 | ||
10-24 | ||||||||||||
| 3/8" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A527 | 00000 | ||
| 1/2" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 100 | 90402A242 | 00000 | ||
| 5/8" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A246 | 0000 | ||
10-32 | ||||||||||||
| 1/4" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A821 | 0000 | ||
| 3/8" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A827 | 0000 | ||
 Steel Pan Head Screws with External-Tooth Lock Washer, 10-32 Thread, 3/8" Long $5.22 per pack of 50 / $0.10 per piece Pack of 50In stock  Select a compatible file type: Parasolid Compatible Products for This Rounded Head Screw | ||||||||||||
| 1/2" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A829 | 0000 | ||
| 5/8" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A830 | 0000 | ||
| 3/4" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A831 | 0000 | ||
| 1" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A835 | 00000 | ||
| 1 1/4" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A839 | 00000 | ||
| 1 1/2" | 0.373" | 0.133" | 0.383" | 0.024" | Fully Threaded | 60,000 psi | ASME B18.13 | 25 | 90402A842 | 0000 | ||
12-24 | ||||||||||||
| 1/2" | 0.425" | 0.151" | 0.41" | 0.027" | Fully Threaded | 60,000 psi | ASME B18.13 | 50 | 90402A605 | 00000 | ||
1/4"-20 | ||||||||||||
| 3/8" | 0.492" | 0.175" | 0.51" | 0.028" | Fully Threaded | 60,000 psi | ASME B18.13 | 25 | 90402A610 | 00000 | ||
| 1/2" | 0.492" | 0.175" | 0.51" | 0.028" | Fully Threaded | 60,000 psi | ASME B18.13 | 25 | 90402A537 | 0000 | ||
| 5/8" | 0.492" | 0.175" | 0.51" | 0.028" | Fully Threaded | 60,000 psi | ASME B18.13 | 25 | 90402A538 | 00000 | ||
| 3/4" | 0.492" | 0.175" | 0.51" | 0.028" | Fully Threaded | 60,000 psi | ASME B18.13 | 25 | 90402A540 | 0000 | ||
| 7/8" | 0.492" | 0.175" | 0.51" | 0.028" | Fully Threaded | 60,000 psi | ASME B18.13 | 25 | 90402A546 | 0000 | ||
| 1" | 0.492" | 0.175" | 0.51" | 0.028" | Fully Threaded | 60,000 psi | ASME B18.13 | 25 | 90402A551 | 0000 | ||
| 1 1/2" | 0.492" | 0.175" | 0.51" | 0.028" | Fully Threaded | Not Rated | ASME B18.13 | 25 | 90402A843 | 0000 | ||
M3 × 0.5 mm | ||||||||||||
| 5 mm | 5.6 mm | 2.4 mm | 5.84 mm | 0.45 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A701 | 00000 | ||
| 6 mm | 5.6 mm | 2.4 mm | 5.84 mm | 0.45 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A702 | 00000 | ||
| 8 mm | 5.6 mm | 2.4 mm | 5.84 mm | 0.45 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A703 | 00000 | ||
| 10 mm | 5.6 mm | 2.4 mm | 5.84 mm | 0.45 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A704 | 00000 | ||
| 12 mm | 5.6 mm | 2.4 mm | 5.84 mm | 0.45 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A705 | 00000 | ||
M4 × 0.7 mm | ||||||||||||
| 6 mm | 8 mm | 3.1 mm | 8.25 mm | 0.6 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A706 | 00000 | ||
| 8 mm | 8 mm | 3.1 mm | 8.25 mm | 0.6 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A707 | 00000 | ||
| 10 mm | 8 mm | 3.1 mm | 8.25 mm | 0.6 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A708 | 00000 | ||
| 12 mm | 8 mm | 3.1 mm | 8.25 mm | 0.6 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A709 | 00000 | ||
| 16 mm | 8 mm | 3.1 mm | 8.25 mm | 0.6 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A710 | 00000 | ||
M5 × 0.8 mm | ||||||||||||
| 8 mm | 9.5 mm | 3.7 mm | 10.5 mm | 0.65 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A711 | 00000 | ||
| 10 mm | 9.5 mm | 3.7 mm | 10.5 mm | 0.65 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A712 | 00000 | ||
| 12 mm | 9.5 mm | 3.7 mm | 10.5 mm | 0.65 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A713 | 00000 | ||
| 16 mm | 9.5 mm | 3.7 mm | 10.5 mm | 0.65 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A714 | 00000 | ||
| 20 mm | 9.5 mm | 3.7 mm | 10.5 mm | 0.65 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A715 | 00000 | ||
M6 × 1 mm | ||||||||||||
| 10 mm | 12 mm | 4.6 mm | 12.1 mm | 0.75 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A716 | 00000 | ||
| 12 mm | 12 mm | 4.6 mm | 12.1 mm | 0.75 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A717 | 00000 | ||
| 16 mm | 12 mm | 4.6 mm | 12.1 mm | 0.75 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A718 | 00000 | ||
| 20 mm | 12 mm | 4.6 mm | 12.1 mm | 0.75 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A719 | 00000 | ||
| 25 mm | 12 mm | 4.6 mm | 12.1 mm | 0.75 mm | Fully Threaded | 60,000 psi | ASME B18.13.1M | 25 | 90402A720 | 00000 | ||
Other Rounded Head Screws
