Specialty Fasteners
Solar Hanger Bolt with EPDM Washer
A2 stainless double-thread hanger bolt, M8/M10/M12, with EPDM seal, nuts and adapter plate for PV roofs.
DINM8
Specialty Fasteners
Fasteners that do one job well: double-threaded hanger bolts that fix solar rails through tiled and metal roofs, and eye and hook screws for hanging, rigging and furniture hardware.
Specialty Fasteners
Eye Screws and Hook Screws
Lag eye screws and cup hooks with wood thread, M2–M12, zinc plated, black, brass or stainless.
M2–M12C1022 steel
Specialty Fasteners
L-Hook Screw
Zinc-plated carbon steel L-shaped screw hook with half thread, for shelves, cabinets and frames.
Carbon steel
Buying guide
How to specify specialty fasteners
Three decisions that prevent most problems on site.
Hanger bolt length
Choose a length that clears roof sheet, batten and rail with at least 60 mm of wood-thread embedment in the rafter.
Load direction
Eye and hook screws are rated for straight-line tension. Side loads reduce capacity sharply.
Material
A2 stainless for solar and outdoor hardware; zinc-plated carbon steel for indoor use.
Applications
Projects using specialty fasteners
Specialty Fasteners: common questions
What sizes of solar hanger bolts do you make?
M8, M10 and M12 with lengths from 150 to 350 mm, supplied with EPDM washer, flange nut and adapter plate.
Can hook screws be custom shaped?
Yes. We bend L, J, cup and question-mark hooks to drawing in wire from 2 to 12 mm.
Do you offer brass or gold finishes?
Yes, brass plating and yellow zinc are available for decorative hooks.
Request for quotation
Quote for specialty fasteners
Tell us the screw, size and quantity. A sales engineer replies within one business day with price, lead time and a sample offer.
- Emailinquiry@china-screw-factory.com
- WhatsApp+86 176 2154 1688
- Phone+86 176 2154 1688