Caliper Overseas is a reputable Slotted Round Head Screw supplier and manufacturer in India, providing reliable fastening solutions for many different industries.A slotted round head screw consists of a round head with a single slot across the top that can be used with flat-blade screwdrivers. Slotted Round Head Screw is suited to woodworking, cabinetry, and mechanical work requiring low usage due to its ease of use.
Made to international standards such as ISO 1580, DIN 96, JIS B1111 and ASME/ANSI B18.6.3, the screws provide consistent performance and quality. With simple installation and a neat, finished look, slotted round head screws are both functional and visually appealing. Crafted using premium materials which provides excellent durability and strength. Looking for fasteners that combine efficiency and elegance? Choose our precision-engineered slotted round head screws for dependable results. Reach out today to explore the full range and get the best prices!

| Metric Size | M2.5 to M10 |
|---|---|
| Inches | 1/8"-3/8" |
| Dimensional Standards | DIN 85, DIN 96, BN 698, DIN 86, ANSI B18.6.3 |
| Length | Length |
| Screws Types | Slotted Round Head Screw |
| Tolerance | +/-0.01mm to +/-0.05mm |
| Threads | METRIC, BSW, BSF, UNC, UNF or as required |
| UTS – Unified Thread Standard | UNC, UNF, UNEF, UNS, NPT, NPTF |
| Application | Wind Tower, Nuclear Power, Railway, Automotive Industry, Construction, Electronic Industry |
| Packaging | Cartoon Box / Wooden Pallet / Wooden Box / Thread Protector |
| Forming | Hot Forged & Cold Forged |
| Certification | Dual Certified As per ASTM & ASME Codes |
| Nominal Sizea | Head Diameter, A | Head Height, H | Slot Width, J | Slot Depth, T | |||||
|---|---|---|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Max. | Min. | Max. | Min. | ||
| ANSI B18.6.3 - 0000 | 0.021 | 0.041 | 0.035 | 0.022 | 0.016 | 0.008 | 0.004 | 0.017 | 0.013 |
| ANSI B18.6.3 - 000 | 0.034 | 0.062 | 0.056 | 0.031 | 0.025 | 0.012 | 0.008 | 0.018 | 0.012 |
| ANSI B18.6.3 - 00 | 0.047 | 0.089 | 0.08 | 0.045 | 0.036 | 0.017 | 0.01 | 0.026 | 0.018 |
| ANSI B18.6.3 - 0 | 0.06 | 0.113 | 0.099 | 0.053 | 0.043 | 0.023 | 0.016 | 0.039 | 0.029 |
| ANSI B18.6.3 - 1 | 0.073 | 0.138 | 0.122 | 0.061 | 0.051 | 0.026 | 0.019 | 0.044 | 0.033 |
| ANSI B18.6.3 - 2 | 0.086 | 0.162 | 0.146 | 0.069 | 0.059 | 0.031 | 0.023 | 0.048 | 0.037 |
| ANSI B18.6.3 - 3 | 0.099 | 0.187 | 0.169 | 0.078 | 0.067 | 0.035 | 0.027 | 0.053 | 0.04 |
| ANSI B18.6.3 - 4 | 0.112 | 0.211 | 0.193 | 0.086 | 0.075 | 0.039 | 0.031 | 0.058 | 0.044 |
| ANSI B18.6.3 - 5 | 0.125 | 0.236 | 0.217 | 0.095 | 0.083 | 0.043 | 0.035 | 0.063 | 0.047 |
| ANSI B18.6.3 - 6 | 0.138 | 0.26 | 0.24 | 0.103 | 0.091 | 0.048 | 0.039 | 0.068 | 0.051 |
| ANSI B18.6.3 - 8 | 0.164 | 0.309 | 0.287 | 0.12 | 0.107 | 0.054 | 0.045 | 0.077 | 0.058 |
| ANSI B18.6.3 - 10 | 0.19 | 0.359 | 0.334 | 0.137 | 0.123 | 0.06 | 0.05 | 0.087 | 0.065 |
| ANSI B18.6.3 - 12 | 0.216 | 0.408 | 0.382 | 0.153 | 0.139 | 0.067 | 0.056 | 0.096 | 0.073 |
| ANSI B18.6.3 - 1⁄4 | 0.25 | 0.472 | 0.443 | 0.175 | 0.16 | 0.075 | 0.064 | 0.109 | 0.082 |
| ANSI B18.6.3 - 5⁄16 | 0.3125 | 0.59 | 0.557 | 0.216 | 0.198 | 0.084 | 0.072 | 0.132 | 0.099 |
| ANSI B18.6.3 - 3⁄8 | 0.375 | 0.708 | 0.67 | 0.256 | 0.237 | 0.094 | 0.081 | 0.155 | 0.117 |
| ANSI B18.6.3 - 7⁄16 | 0.4375 | 0.75 | 0.707 | 0.328 | 0.307 | 0.094 | 0.081 | 0.196 | 0.148 |
| ANSI B18.6.3 - 1⁄2 | 0.5 | 0.813 | 0.766 | 0.355 | 0.332 | 0.106 | 0.091 | 0.211 | 0.159 |
| ANSI B18.6.3 - 9⁄16 | 0.5625 | 0.938 | 0.887 | 0.41 | 0.385 | 0.118 | 0.102 | 0.242 | 0.183 |
| ANSI B18.6.3 - 5⁄8 | 0.625 | 1 | 0.944 | 0.438 | 0.411 | 0.133 | 0.116 | 0.258 | 0.195 |
| ANSI B18.6.3 - 3⁄4 | 0.75 | 1.25 | 1.185 | 0.547 | 0.516 | 0.149 | 0.131 | 0.32 | 0.242 |
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