ASME B18.3 Flat Point Set Screws
ASME B18.3 flat point set screws are internally driven fasteners designed to secure components in position without a projecting screw head. Their flat contact ends provide a broad, even bearing surface against the mating part, making them suitable for applications where a stable contact surface and minimal surface indentation are required. These set screws are commonly used in machinery, equipment assemblies, and other applications involving the positioning or retention of components on shafts.
We supply flat point socket set screws manufactured to ASME B18.3 dimensional requirements, with options for different sizes, materials, and finishes to meet specific application needs. Our production capabilities include cold heading, thread rolling, and precision machining, supported by dimensional inspection and thread gauging to maintain product consistency.
Specification:
| Item | Specification |
|---|---|
| Standard | ASME B18.3 |
| Product Type | Flat Point Socket Set Screws |
| Drive Type | Hex Socket |
| Point Tppe | Flat Point |
| Thread Standard | ASME B1.1 Unified Inch Screw Threads |
| Thread | UNC,UNF |
| Thread Tolerance | 2A |
| Size Range | #0-2" |
| Surface Treatment | Black Oxidation,Zinc Plated,Bright Finish,Passivation |
| Mechanical Property(Steel) | ASTM F912 |
| Mechanical Property(Stainless Steel) | ASTM F880 |
Dimension Chart of ASME B18.3 Flat Point Set Screws:
| Mon | #0 | #1 | #2 | #3 | #4 | #5 | #6 | #8 | #10 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 5/8 | 3/4 | 7/8 | 1 | 1-1/8 | 1-1/4 | 1-3/8 | 1-1/2 | 1-3/4 | 2 |
| P | 80 | 64 | 56 | 48 | 40 | 40 | 32 | 32 | 24 | 20 | 18 | 16 | 14 | 13 | 11 | 10 | 9 | 8 | 7 | 7 | 6|8 | 6|8 | 5|8 | 4.5 |
| s | 0.028 | 0.035 | 0.035 | 0.05 | 0.05 | 0.062 | 0.062 | 0.078 | 0.094 | 0.125 | 0.156 | 0.188 | 0.219 | 0.25 | 0.312 | 0.375 | 0.5 | 0.562 | 0.562 | 0.625 | 0.625 | 0.75 | 1 | 1 |
| t min | 0.05 | 0.06 | 0.06 | 0.07 | 0.07 | 0.08 | 0.08 | 0.09 | 0.1 | 0.125 | 0.156 | 0.188 | 0.219 | 0.25 | 0.312 | 0.375 | 0.5 | 0.562 | 0.562 | 0.625 | 0.625 | 0.75 | 1 | 1 |
| dp max | 0.033 | 0.04 | 0.047 | 0.054 | 0.061 | 0.067 | 0.074 | 0.087 | 0.102 | 0.132 | 0.172 | 0.212 | 0.252 | 0.291 | 0.371 | 0.45 | 0.53 | 0.609 | 0.689 | 0.767 | 0.848 | 0.926 | 1.086 | 1.244 |
| dp min | 0.027 | 0.033 | 0.039 | 0.045 | 0.051 | 0.057 | 0.064 | 0.076 | 0.088 | 0.118 | 0.156 | 0.194 | 0.232 | 0.27 | 0.347 | 0.425 | 0.502 | 0.579 | 0.655 | 0.733 | 0.808 | 0.886 | 1.039 | 1.193 |
- RELATED SCREWS:
- SET SCREWS
- ASME B18.3 Flat Point Set Screws
- ASME B18.3 Oval Point Socket Set Screws
- ASME B18.3 Cup Point Socket Set Screw
- ASME B18.3 Cone Point Set Socket Screws
- ASME B18.3 Half Dog Point Spline Socket Set Screws
- DIN914 Cone Point Set Screws
- DIN915 Dog Point Set Screws
- DIN916 Cup point Socket Set Screws
Mechanical Property:
ASTM F912 — Alloy Steel Flat Point Set Screws
Alloy steel flat point set screws are used to secure components by applying pressure through a flat-ended tip. For these screws, ASTM F912 specifies the mechanical requirements for quenched and tempered alloy steel, including a hardness range of 45–53 HRC. The specification also covers torsional strength, torque performance, and other quality requirements relevant to set screw performance under compressive loading.
ASTM F880 — Stainless Steel Flat Point Set Screws
Stainless steel flat point set screws are suitable for assemblies that require corrosion resistance as well as secure component positioning. ASTM F880 covers austenitic stainless steel set screws. Its requirements include material composition, torque performance, Vickers hardness, and corrosion resistance. The following table outlines the relevant requirements for evaluating stainless steel flat point set screws.