HANDA. NINGBO

Part group 02 / 05 · Ningbo, China

Custom bolts,
head and thread to spec.

Hex bolts, socket head cap screws, flange bolts, carriage bolts, anchor bolts and special heads. Property class and thread length are set by your drawing, and the head marking is yours to define.

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Specification

Bolts to drawing

Sizes
M5 to M24 as standard, up to M30 quoted per drawing. Length 10 to 300 mm, thread full or part to your drawing.
Head styles
Hex, socket head cap, button socket, flange, carriage, anchor, square, eye, T-head, and special forged or machined profiles.
Property class
Carbon steel 4.8 / 8.8 / 10.9 / 12.9, stainless A2-70 and A4-80, brass and aluminium. Proof load and hardness tested per batch.
Head marking
Your class marking, logo or blank head, as you specify. Marking is stamped or rolled before plating.
Finish
Blue zinc, clear zinc, hot-dip galvanised, black oxide, nickel, zinc-nickel, Dacromet, Geomet, Xylan, plain. Coating thickness reported on the inspection sheet.

Every dimension is taken from your drawing or sample. Where this page and your drawing disagree, your drawing wins.

Where these parts go

Applications

Structural and mechanical joints where property class, thread length and coating all matter at the same moment.

Screws

Machine, self-tapping, self-drilling, set and security screws to drawing.

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Nuts & Washers

Hex, nyloc and cap nuts; flat, spring and lock washers in four materials.

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Turned Parts

Pins, shafts, spacers, bosses and special components from bar stock.

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Threaded Rods

Full-thread rod, double-end and tap-end studs, cut to length.

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Questions buyers ask

01
Can you do 12.9 property class?
Yes, with a controlled heat treatment lot plus hardness and proof load testing. The class goes on the inspection sheet, and a third-party test report can be arranged.
02
Do you make hot-dip galvanised bolts?
Yes. Galvanising runs on finished bolts with a thread allowance so the nut still fits after coating. For outdoor steelwork we usually recommend it over thin zinc.
03
Can you mark our logo on the head?
Yes. Send the artwork and the head dimensions. On small heads we use a simplified mark. The first piece is photographed and sent to you before the batch runs.
04
What about thread length rules?
We follow the drawing: b, m or L designations are held as written. For blind holes the thread can be shortened to suit the hole depth.
05
How do you control hydrogen embrittlement?
Bolts at 10.9 and above that are electroplated go through a bake cycle within the hour after plating. The plating lot record keeps the bake time.
06
Can you supply matching nuts and washers?
Yes, and it is usually cheaper to ship them together. Matched sets are packed per size so the installer does not sort them on site.

Next step

Send one drawing.
Get a costed sheet.

Drawing or sample, material, quantity, and the destination port. We reply within one working day with unit price, tooling, lead time and shipping.

WhatsApp +86 150 5745 4081 yulonghua50@gmail.com RFQ form