5/16 SS Countersunk Machine Screw (INCH)
ASME B18.6.3 5/16" stainless steel countersunk head screws in A2 (304) grade with Phillips drive. Inch-dimensioned flush-mounting screws at 5/16-inch diameter.
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
Dimension
#
Size (inch)
Thread Dia (min-max inch)
Pitch (TPI)
Length (inch)
Thread Length (inch)
#6
0.138-0.1380
32
1/4-1 1/2
Full thread
#10
0.190-0.1900
24
3/8-2
Full thread
1/4"
0.250-0.2500
20
1/2-3
Full thread
5/16"
0.3125-0.3125
18
5/8-3
Full thread
3/8"
0.375-0.3750
16
3/4-4
Full thread
- All dimensions in inches, tolerance +/- 0.001 inch. Additional dimensions available on request.
Benefits
#
The 5/16-inch stainless steel countersunk machine screw addresses flush-mounting in imperial-dimensioned assemblies where metric fasteners are not interchangeable. A2-70 grade provides 700 MPa tensile strength with inherent corrosion protection. The 82° head angle matches ASME B18.6.3 standard countersink tooling. Phillips drive compatibility ensures installation with standard hand and powered drivers.
Common Applications
#
5/16" SS countersunk machine screws (inch) are specified for flush US-spec fastening:
- US-spec machinery flush panels
- Marine deck hardware (inch)
- Automotive interior trim (inch)
- Food processing equipment (inch)
- HVAC access panels (inch)
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 |
| Size (inch) | Thread Dia (min-max inch) | Pitch (TPI) | Length (inch) | Thread Length (inch) |
|---|---|---|---|---|
| #6 | 0.138-0.1380 | 32 | 1/4-1 1/2 | Full thread |
| #10 | 0.190-0.1900 | 24 | 3/8-2 | Full thread |
| 1/4" | 0.250-0.2500 | 20 | 1/2-3 | Full thread |
| 5/16" | 0.3125-0.3125 | 18 | 5/8-3 | Full thread |
| 3/8" | 0.375-0.3750 | 16 | 3/4-4 | Full thread |
