Other parts
Shoulder Screw
Shoulder screw - 318 alloy steel and 319 stainless steel shoulder screws with machined shoulders from D4 to D20. Wholesale supply with OEM/ODM customization.
Specifications
- Type
- Shoulder screw (shoulder bolt)
- Type codes
- 318 (alloy steel, grade 10.9); 319 (stainless steel, A2-50)
- Shoulder diameters
- D4 to D20 (tolerance e9)
- Materials
- 318: SCM435, 33-38 HRC; 319: SUS304
- Drive
- Hex socket
- Customization
- OEM/ODM to drawing or sample
- Brand
- SKN Fastener Co., Ltd.
- Origin
- Made in Shenzhen, China
- Quotation
- Send drawing or sample to sales@sknfastener.com
Overview
Shoulder screws (shoulder bolts) have a machined, unthreaded shoulder that acts as a pivot or locating pin, with a threaded end to clamp the part. The head takes a hex socket drive. Type 318 is SCM435 alloy steel; type 319 is SUS304 stainless steel.
Available Sizes and Options
Shoulder diameters from D4 to D20 with a range of shoulder lengths (see the tables). Custom sizes are quoted from your drawing under our OEM/ODM service.
Type and material options (D tolerance e9), and the shoulder diameter (D), length (L), and thread length (F) table in mm.
Type | D tolerance | Material | Hardness | Hardness grade |
|---|---|---|---|---|
318 | e9 | SCM435 | 33 - 38 HRC | 10.9 |
319 | e9 | SUS304 | - | A2-50 |
Type | D | L | F |
|---|---|---|---|
318 / 319 | 4 | 10, 15, 20, 25, 30, 35, 40, 45 | 5 |
318 / 319 | 4.5 | 10, 15, 20, 25, 30, 35, 40, 45, 50 | 6 |
318 / 319 | 5 | 10, 15, 20, 25, 30, 35, 40, 45, 50 | 6 |
318 / 319 | 5.5 | 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 | 7 |
318 / 319 | 6 | 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70 | 7 |
318 / 319 | 6.5 | 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 | 9 |
318 / 319 | 8 | 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 110, 120 | 9 |
318 / 319 | 10 | 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 110, 120 | 12 |
318 / 319 | 12 | 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100 | 12 |
318 / 319 | 13 | 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 110, 120, 130 | 16 |
318 / 319 | 16 | 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 110, 120, 130, 140, 150 | 18 |
318 / 319 | 20 | 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150 | 24 |
Materials and Finishes
318: SCM435 alloy steel, hardness 33 - 38 HRC, strength grade 10.9. 319: SUS304 stainless steel, A2-50. Shoulder tolerance e9. Special materials and finishes follow your drawing.
Applications
Pivot and locating points on linkages, pivoting joints, and moving assemblies that must stay aligned. SKN fasteners serve six industries: manufacturing, aviation equipment, industrial equipment, medical devices, stage and entertainment, and the marine industry.
Buyer FAQs
Q: What information do you need to quote?
A: The type (318 or 319), shoulder diameter, shoulder length, and quantity. A drawing or sample speeds everything up.
Q: Can you manufacture from a drawing or sample?
A: Yes. Send the drawing or sample and we manufacture to match under our OEM/ODM service.
Q: Do you supply bulk orders worldwide?
A: Yes. We supply B2B customers, wholesalers, and OEM clients worldwide from Shenzhen with export packing.
