Hot-Dip Galvanised (HDG) Range
All HDG fasteners are zinc-coated through the hot-dip galvanising process, providing durable corrosion protection for inland, semi-urban, and standard rooftop or ground-mount solar installations.
Hex Bolt
- Size: M8, M10, M12, M14
- Length : 20mm-40mm
- Grade: 8.8 / 5.6
- Coating: Hot-Dip Galvanised (HDG)
- Standard: DIN 933 / IS0 4017
Hex Nuts
- Size: M8 – M14
- Grade: 8.8 / 5.6
- Coating: Hot-Dip Galvanised (HDG)
- Standard: DIN 934 / IS 1364
- Type: Full hex nut
Plain Washers (2 nos. per set)
- Size: M8 – M14
- Coating: Hot-Dip Galvanised
- Standard: DIN 125
- Qty: 2 plain washers supplied per fastener assembly (one under bolt head, one under nut)
Spring Washers
- Size: M8 – M14
- Coating: Hot-Dip Galvanised
- Standard: DIN 127 / IS 3063
- Type: Split lock washer — prevents loosening under vibration and thermal cycling
Circular Oversized OD Washers [On Request]
- Type: Large outside-diameter fender-style washer
- Bore: M8 – M14
- OD: Oversized / custom — specify OD requirement at enquiry
- Coating: Hot-Dip Galvanised
- Use: Load distribution across solar rail, thin sheet metal, and mounting structures
- Availability: On request
HDG Supply Options
| Assembled Set | Individual Components | |
| Contents | Bolt + Nut + 2x Plain Washer + Spring Washer, pre-assembled | Each component ordered separately in any qty |
| Best for | Site installation teams — reduces on-site assembly time | Contractors managing own inventory and kitting |
| Add-ons | Serrated / Square / Oversized OD washer added on request | Order any additional washer type separately |
Why Source From Us?
- India's largest stockist of solar fasteners — both HDG and stainless steel ranges
- All sizes M8–M14 available off-the-shelf with no lead time for in-stock items
- HDG 8.8,5.6, SS 304 and SS 316 are stocked across the full size range
- Assembled sets reduce on-site labour; individual supply supports custom kitting
- Bulk pricing available for MW-scale solar EPC and O&M contractors
- Reliable dispatch with nationwide delivery across India
HDG vs Stainless Steel — Which Do I Need?
| HDG | SS 304 / SS 316 | |
| Coating / Grade | Hot-Dip Zinc Galvanised | Stainless Steel 304 or 316 |
| Best environment | Inland, urban, standard rooftop and ground-mount projects | Coastal, marine, high-humidity, chemical-exposure sites |
| Corrosion resistance | Good — zinc barrier protection | Excellent — passive oxide layer; SS316 adds chloride resistance |
| Cost | More cost-effective for large volumes | Higher unit cost; justified by longer service life in harsh environments |
| Special washers | Oversized OD (on request) | Serrated, Square, Oversized OD (all on request) |
How to Enquire / Order
Please share the following when requesting a quote:
- Bolt size required (M8 / M10 / M12 / M14)
- Length (20 mm – 40 mm, or specify custom)
- Range: HDG or Stainless Steel (SS 304 / SS 316)
- Supply format: Assembled set or individual components
- Additional washers needed: Serrated / Square / Oversized OD (SS range); Oversized OD (HDG range)
Total quantity and delivery location