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PANEL SCREW
SOCKET HEAD CAPTIVE SCREW
METRIC
| Size | Pitch | Hex Drive | Head Height k | Head Diameter A | Shrank Diameter Ds | Drive depth t | Thread Length b | Major diameter D | ||||||
| Max | Min | Max | Min | Max | Min | Max | Min | ref | ref | Max | Min | |||
| M3 | 0.5 | 2.58 | 2.52 | 3 | 2.86 | 5.68 | 5.32 | 2 | 1.86 | 1.3 | 4 | 2.98 | 2.87 | |
| M4 | 0.7 | 3.08 | 3.02 | 4 | 3.82 | 7.22 | 6.78 | 2.8 | 2.66 | 2 | 6 | 3.978 | 3.838 | |
| M5 | 0.8 | 4.1 | 4.02 | 5 | 4.82 | 8.72 | 8.28 | 3.5 | 3.32 | 2.5 | 8 | 4.976 | 4.826 | |
| M6 | 1 | 5.15 | 5.02 | 6 | 5.7 | 10.22 | 9.78 | 4.5 | 4.32 | 3 | 10 | 5.97 | 5.82 | |
| M8 | 1.25 | 6.14 | 6.02 | 8 | 7.64 | 13.27 | 12.73 | 5.5 | 5.32 | 4 | 12 | 7.96 | 7.79 | |
| M10 | 1.5 | 8.18 | 8.02 | 10 | 9.64 | 16.27 | 15.73 | 7.0 | 6.78 | 5 | 15 | 9.96 | 9.77 | |
Product Overview:
“This precision M4x30 captive socket cap screw in A4 (316) stainless steel is designed for marine, medical, and electronic enclosures where preventing fastener loss during maintenance is critical. The specialized reduced shank ensures smooth panel retention in automated environments.”
Applications:
Captive screws are widely used in: – Electronic equipment panels – Telecommunications enclosures – Medical devices – Industrial control cabinets – Access panels
Why Choose Our Captive Screws?
From prototype to bulk production with the original manufacturer+Quality Certified ISO standards with QC report and mill cert
Technical Resources:
Download: Complete Technical Guide to Captive Screws
💡 Learn how to properly implement counterbores for captive screws in our technical blog
Shanghai Screwtool is a long-standing OEM supplier who has served US and Europe fastener industry for over 20 years.
If you have regular demands for screws or fasteners, we recommend that you can contact us directly (info@shscrewtool.com) for economic offer and complete service.
