SS Pan Head Machine Screw (INCH)
Stainless steel pan head machine screws (inch series) per ANSI/ASME B18.6.3 feature a cylindrical head with Phillips cross-recessed drive and UNC imperial threads from #2 to 3/8". Available in 18-8 (304) and 316 stainless steel grades with Class 2A thread per ASME B1.1.
Specification
#
Standard
ANSI/ASME B18.6.3
Thread
Coarse (standard)
Material
Stainless Steel 304 (A2)
Grade
A2-70
Stock
In stock (304). Grade 316 available against bulk order
Head Type
Pan head
Drive Type
Phillips cross-recessed
Thread Class
Class 2A per ASME B1.1
Finish
Plain/Passivated (stainless steel)
Dimension
#
Size (inch)
Thread Dia (min-max inch)
Pitch (TPI)
Length (inch)
Thread Length (inch)
#6
0.138-0.138
32
0.50
0.50
#8
0.164-0.164
32
0.625
0.625
#10
0.190-0.190
24
0.75
0.75
1/4"
0.250-0.250
20
1.00
1.00
5/16"
0.3125-0.3125
18
1.25
1.25
- All dimensions in inches, tolerance +/- 0.001 inch. Additional dimensions available on request.
Benefits
#
Inch-series pan head machine screws solve compatibility challenges in North American equipment and legacy systems designed to imperial specifications. The Phillips cross-recessed drive enables consistent torque application during assembly, reducing operator fatigue and improving repeatability compared to slotted drives. Stainless steel construction provides inherent corrosion resistance without additional plating or coating processes, eliminating a common failure point in plated carbon steel fasteners where coating damage exposes the substrate. The flat bearing surface distributes clamping load across the joint, preventing indentation on thin sheet metal and softer materials. Austenitic 18-8 and 316 grades remain essentially non-magnetic, supporting use in sensitive electronic enclosures and instrumentation. Imperial thread sizing ensures direct replacement compatibility in existing assemblies without re-tapping or adapter hardware.
Common Applications
#
Inch-series pan head machine screws serve industries operating to imperial specifications and North American equipment standards.
- Legacy equipment maintenance and repair
- North American market product assembly
- Aerospace and defense equipment
- Electrical enclosures and control panels
- Automotive component fastening
- Industrial machinery assembly
- Marine equipment and hardware
- Telecommunications rack mounting
- HVAC system connections
Read Me
| Standard | ANSI/ASME B18.6.3 |
| Thread | Coarse (standard) |
| Material | Stainless Steel 304 (A2) |
| Grade | A2-70 |
| Stock | In stock (304). Grade 316 available against bulk order |
| Head Type | Pan head |
| Drive Type | Phillips cross-recessed |
| Thread Class | Class 2A per ASME B1.1 |
| Finish | Plain/Passivated (stainless steel) |
| Size (inch) | Thread Dia (min-max inch) | Pitch (TPI) | Length (inch) | Thread Length (inch) |
|---|---|---|---|---|
| #6 | 0.138-0.138 | 32 | 0.50 | 0.50 |
| #8 | 0.164-0.164 | 32 | 0.625 | 0.625 |
| #10 | 0.190-0.190 | 24 | 0.75 | 0.75 |
| 1/4" | 0.250-0.250 | 20 | 1.00 | 1.00 |
| 5/16" | 0.3125-0.3125 | 18 | 1.25 | 1.25 |
