General Machinery & Steelwork Assembly Fasteners | Stocked Standards, Custom to Drawing
Bolting for machine frames, drive parts, curtain wall and solar trackers, racking, factory steelwork and vehicle assembly lines: stocked DIN933/931/912/934 sizes plus customs from M4-M100 (inch included); 8.8/10.9 hot-dip or Dacromet for steelwork and outdoor builds, lock nuts and torque control at vibrating machine and vehicle stations, and full-container kitting or private-label packing for distributors.
Key Technical Challenges
Mixed standard + custom baskets land on staggered dates - one missing size stops the crew
Transverse slip at machine and vehicle stations walks plain nuts loose turn by turn
DIN drawings, GB purchasing, ISO inspection slow matching; legacy 19 mm vs new 18 mm M12 clashes
Distributors want small frequent lots, labelling and repacking without dead stock
Xin Rui Da Fastener Solutions
One-stop completeness: stocked standards plus 15-25 day customs, consolidated in one container with VCI bags and IPPC crates
Zoned locking: DIN985 nylon for general vibration (5-10 remakes); DIN980 all-metal for hot zones (300°C+); threadlocker treated as permanent on maintenance-free joints
Preload management: M6-M24 torque chart (mu ~0.14 basis) shipped with goods; outdoor steelwork in HDG/Dacromet
One cross-reference chart ends standard confusion; distributor programmes run on bagging, barcodes and multilingual labels
Technical Parameters
| Stocked Lines | DIN 933 · 931 · 912 · 934 · 6921 · 985 |
| Grades | 4.8 / 8.8 / 10.9 · A2-70 / A4-80 |
| Custom Range | M4-M100 incl. inch sizes |
| Torque Chart | M6-M24 supplied (dry, mu ~0.14) |
| Packing | VCI + desiccant, retail labelling supported |
Frequently Asked Questions
Yes - stocked sizes release in 3-7 days, drawings run 15-25 days, then everything consolidates into one shipment; quotes list quantity, date and marks per model, and partial early shipments can be arranged.
Manage preload first (torque chart + wrench audits), then zone the hard cases: DIN985 nylon for general vibration, DIN980 all-metal for heat. It beats wholesale swaps to "nicer bolts" by a wide margin.
Yes - per-SKU boxes or blisters with your barcode and multilingual labels under the standard VCI + desiccant protection; framework pricing with retained samples is available for contract customers.
Get a Fastening Solution for This Industry
Send the joint duty — load, media, temperature and size — and our engineers reply with class selection and quotation within 24 hours.