PT31 · Bolts & Clamping Screws
Shoulder Bolt
Ground-shoulder socket bolt that both positions and fastens fixture components.
- 8 part numbers with full dimensions
- Material: SCM435 (JIS) / 34CrMo4 (DIN)
- Heat treated: HRC 32°–38°

Shoulder Bolt part numbers & dimensions
8 part numbers. All dimensions in millimetres (mm) unless noted; letters match the dimension drawing. On a phone, swipe the table sideways. Tap “Quote” to email us about a part.
Dimension drawing

| Model No. | ØA (g6) | B | ØC | D | E | F | G | kg | Quote |
|---|---|---|---|---|---|---|---|---|---|
| PT31-1245 | 12 | 45 | 18 | 23 | M12 | 57 | 10 | 0.053 | Quote |
| PT31-1255 | 12 | 55 | 18 | 33 | M12 | 67 | 10 | 0.060 | Quote |
| PT31-1265 | 12 | 65 | 18 | 43 | M12 | 77 | 10 | 0.070 | Quote |
| PT31-1275 | 12 | 75 | 18 | 53 | M12 | 87 | 10 | 0.078 | Quote |
| PT31-1655 | 16 | 55 | 24 | 28 | M16 | 72 | 14 | 0.120 | Quote |
| PT31-1665 | 16 | 65 | 24 | 40 | M16 | 82 | 14 | 0.140 | Quote |
| PT31-1675 | 16 | 75 | 24 | 50 | M16 | 92 | 14 | 0.150 | Quote |
| PT31-1688 | 16 | 88 | 24 | 68 | M16 | 105 | 14 | 0.165 | Quote |
Material & specifications
- Material: SCM435 (JIS) / 34CrMo4 (DIN)
- Heat treated: HRC 32°–38°
- Application: position and fasten with this accurately ground bolt
- Shoulder ØA ground to g6
Ordering the Shoulder Bolt
Send us the PT31 part numbers and quantities you need and we will reply with pricing and lead time. Not sure which size fits your fixture? Email info@clampsupply.com or call (619) 704-3113 and we will help you choose. Please confirm critical dimensions before machining your fixture.
