ASME B18.6.3 Slotted Pan Head Screws
ASME B18.6.3 slotted pan head screws feature a rounded head with a single straight slot for installation using a flat-blade screwdriver. The pan head provides a broad bearing surface and a smooth, rounded profile above the fastening surface. These screws are commonly used in machinery, electrical equipment, metal enclosures, and general assembly applications where inch-series machine screws are required.
We supply slotted pan head screws in a range of inch-series sizes and lengths, with dimensions specified according to ASME B18.6.3. Depending on the application, available options may include carbon steel, stainless steel, and different surface finishes. Thread specifications, material requirements, and mechanical properties can be selected according to the applicable standards and customer drawings.
Specification:
ASME B18.6.3 slotted pan head screws are inch-series machine screws featuring a rounded head and a single straight slot. They are available in various screw sizes, thread pitches, and lengths to accommodate different fastening requirements. Specifications cover slot geometry, thread characteristics, and applicable material requirements. Material options and surface finishes can be selected according to the intended application and customer requirements.
| Item | Specification |
|---|---|
| Standard | ASME B18.6.3 |
| Product Name | Slotted Pan Head Machine Screws |
| Head Type | Pan Head |
| Drive Type | Slotted |
| Size Range | #0-3/4" |
| Property Class | SAE J429 GR.2 GR.5 GR.8 |
| Stainless Steel Class | ASTM F593 |
| Thread | UNC,UNF |
| Thread Standard | ASME B1.1 |
| Thread Tolerance | 2A |
| Surface Treatment | Plain,Zinc Plated,Bright Finish,Passivation |
| Inspection | Dimensions, Thread,Mechanical Property,Coating |
Dimension Chart of ASME B18.6.3 Slotted Pan Head Screws:
| Mon | #0 | #1 | #2 | #3 | #4 | #5 | #6 | #8 | #10 | #12 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 |
| P | 80 | 64|72 | 56|64 | 48|56 | 40|48 | 40|44 | 32|40|48 | 32|36 | 24|32 | 24|28|32 | 20|28|32|26 | 18|24|32|22 | 16|24|32|20 | 14|20|28 | 13|20|28 | 12|18|24 | 11|18|24 | 10|16|20 |
| dk max | 0.116 | 0.142 | 0.167 | 0.193 | 0.219 | 0.245 | 0.27 | 0.322 | 0.373 | 0.425 | 0.492 | 0.615 | 0.74 | 0.863 | 0.987 | 1.041 | 1.172 | 1.435 |
| dk min | 0.104 | 0.13 | 0.155 | 0.18 | 0.205 | 0.231 | 0.256 | 0.306 | 0.357 | 0.407 | 0.473 | 0.594 | 0.716 | 0.837 | 0.958 | 1 | 1.125 | 1.375 |
| k max | 0.039 | 0.046 | 0.053 | 0.06 | 0.068 | 0.075 | 0.082 | 0.096 | 0.11 | 0.125 | 0.144 | 0.178 | 0.212 | 0.247 | 0.281 | 0.315 | 0.35 | 0.419 |
| k min | 0.031 | 0.038 | 0.045 | 0.051 | 0.058 | 0.065 | 0.072 | 0.085 | 0.099 | 0.112 | 0.13 | 0.162 | 0.195 | 0.228 | 0.26 | 0.293 | 0.325 | 0.39 |
| n max | 0.023 | 0.026 | 0.031 | 0.035 | 0.039 | 0.043 | 0.048 | 0.054 | 0.06 | 0.067 | 0.075 | 0.084 | 0.094 | 0.094 | 0.106 | 0.118 | 0.133 | 0.149 |
| n min | 0.016 | 0.019 | 0.023 | 0.027 | 0.031 | 0.035 | 0.039 | 0.045 | 0.05 | 0.056 | 0.064 | 0.072 | 0.081 | 0.081 | 0.091 | 0.102 | 0.116 | 0.131 |
| t max | 0.022 | 0.027 | 0.031 | 0.036 | 0.04 | 0.045 | 0.05 | 0.058 | 0.068 | 0.077 | 0.087 | 0.106 | 0.124 | 0.142 | 0.161 | 0.179 | 0.197 | 0.234 |
| t min | 0.014 | 0.018 | 0.022 | 0.026 | 0.03 | 0.034 | 0.037 | 0.045 | 0.053 | 0.061 | 0.07 | 0.085 | 0.1 | 0.116 | 0.131 | 0.146 | 0.162 | 0.192 |
Application:
Machinery and Industrial Equipment
ASME B18.6.3 slotted pan head screws are used to secure brackets, covers, mounting plates, and other components in machinery and industrial equipment. They are suitable for general mechanical assembly where inch-series machine screws are specified.
Electrical Enclosures and Control Panels
These screws are commonly used to fasten panels, enclosure covers, terminal housings, and mounting components in electrical equipment. Material and surface finish can be selected according to the installation environment and equipment requirements.
Metal Fabrication and Component Assembly
Slotted pan head screws are suitable for joining sheet metal parts, small brackets, and fabricated components. Their rounded head provides a broad bearing surface for general fastening applications, subject to the design of the joint and the required clamping force.