Custom Fasteners Manufacturer — Non-Standard & Made to Print

What this part is and where it is used

Custom fasteners are non-standard threaded and mating parts — screws, bolts, nuts, washers, studs and threaded rods — machined to your drawing instead of picked from a distributor’s catalog. Where a stock supplier covers standard sizes, we take the opposite job: the head form, thread, material and tolerance on your print define the part, and we machine it in our own factory in Qidong City, Jiangsu Province, China.

Every fastener assembly is built from a few load-bearing elements. The parts of a fastener set do different work: a bolt or stud passes through the components and takes the clamping load, a nut and washer seat against the far side and spread that load, and a screw threads into a tapped hole or a mating body. Custom versions are specified when a design needs a particular grip length, an uncommon thread, a special head, or a material the catalog does not carry. The people who order from us are design engineers, procurement teams and maintenance managers who need a made-to-print part or a low-volume production run.

Because these parts are made to print, the same drawing also locks down the terms you can quote against: the material grade, the tolerance and the quantity drive the price, not a catalog line number. Drawing-based fasteners are therefore priced by the part rather than by the box, and a first batch and a production run can be quoted from one setup.

Product families we machine

One factory machines the full threaded family and its mating parts. Start from the part you need and we carry the mating pieces in the same order:

• Custom screws — pan, flat, button, socket cap, hex and set screws.
• Custom bolts — hex, flange, shoulder and structural bolts.
• Custom nuts — hex, flange, coupling and special nuts matched to your thread.
• Custom washers — flat, spring and shim washers.
• Threaded rods and studs — single- or double-ended, cut to length.
• Custom pins — dowel, locating and spring pins.
• Spacers and standoffs — threaded and plain standoffs for PCB and assembly work.
• Threaded inserts — for strong threads in soft or thin materials.

Related turned parts such as custom shafts and fittings and adapters run on the same floor, so a fastener and its mating bore come from one drawing set.

Thread forms and standards

Every thread on these parts is cut on our own floor to the form on your drawing. Metric threads use the M series and inch threads use UNC/UNF coarse or fine series; BSP and NPT cover sealing threads. We reference DIN, ISO and ANSI/ASTM geometry, and your drawing always takes precedence — see the thread standards guide.

The tolerance class comes from the print: commonly 6g for external threads and 6H for internal threads. Pitch in millimeters or threads per inch is confirmed per drawing, and left-hand, fine-pitch and partially threaded runs are cut from the same setup.

Dimensions we work to

Diameter, length, grip length, head size and thread run are taken from your drawing rather than capped at catalog sizes. General dimensions are held to ISO 2768-m unless your print states otherwise, and precision features are held to ±0.01 mm. See our tolerances page.

A 50-piece first run validates the geometry and finish; production repeats it in 25–35 days after approval. Send a STEP, DWG or PDF and we confirm the dimensions against our drawing requirements before quoting.

Materials, threads and finishes

Material follows your specification. We regularly machine aluminium 2024, 5052, 6061 and 7075; stainless steel 301, 303, 304, 316, 316L and 17-4PH; carbon and alloy steel 1045, 1215 and 4140; tool steel D2 and O1; brass, copper and bronze; and titanium. Stainless steel fasteners and stainless fasteners are among our most common requests where assemblies face moisture or corrosion, and the grade call-out is where the decision is actually made: 303 for volume, 304 for general service, 316L for chlorides, 17-4PH where the fastener also carries high load, and 301 where it has to take a spring temper. The full grade list is on our materials index, with detail on the stainless steel parts, aluminium parts, steel parts, brass and copper parts and titanium parts pages.

Threads are cut to metric or inch systems, or to DIN and ANSI/ASTM references — our thread standards guide explains the options. We cut coarse and fine pitches, left-hand threads, and threads that stop partway along the shank — whatever the print specifies. Finishing runs through our vetted partner network and is managed under one quality process: anodizing, zinc plating, black oxide and passivation, among others.

Industries and applications

Hex head fasteners and specialty items reach automotive, aerospace, medical, oil and gas, hydraulic and pneumatic and electronics hardware assemblies. Each industry carries its own material and tolerance expectations; we hold the same ±0.01 mm precision capability across all of them. Titanium fasteners show up where weight and corrosion both matter, and brass and copper where conductivity or a soft sealing face is needed.

Why order this part from our factory

We machine in-house — turning and milling done on our own floor, not resold from another plant’s inventory. General work is held to ISO 2768-m unless stated on the drawing, and precision features to ±0.01 mm. Orders start from 50 pieces, samples ship in 5–10 days and production runs 25–35 days. Monthly capacity runs over 100,000 parts, scheduled flexibly per order, so a 50-piece first run and a larger follow-up are both handled from the same line. Send a drawing and we return DFM feedback with a quote within 24 hours; a material certificate (MTR) and pre-shipment photos ship with every batch. Buyers who have compared fastener manufacturers in usa or fastener companies in usa often route drawing-based parts to a specialty fastener manufacturer for exactly that reason: a printable quote without a catalog constraint. Reach us on WhatsApp or use the quote form.

Types and variants we manufacture

We manufacture the main insert families, each made to drawing rather than pulled from a fixed range.

• Heat-set inserts — pressed into a preformed hole or boss with heat so the host material flows around the body, locking it in place.
• Press-fit inserts — knurled, splined or barbed bodies pressed into a hole for a permanent, torque-resistant seat.
• Rivet nuts — set like a blind rivet to add a threaded mounting point to thin panels.
• Key-locking inserts — a solid body locked by driven keys, for high-strength threads that stay removable.
• Weld nuts and weld-on inserts — welded to the host for a permanent, high-strength thread.
• Wire-thread (helicoil-type) inserts — a coiled wire thread that repairs or reinforces a tapped hole.
• Standoff inserts — combine an internal thread with a spacing or locating body.

Every variant is defined by your print: thread size and pitch, outside diameter, body length, flange, knurl or key detail. See our fastener specifications guide for the dimensions we need.

Types and variants we manufacture

The parts in this family share one quality: their geometry is fixed, so the machining is repeatable. Standard pins and dowels are turned to a diameter and length; spacers and standoffs carry bores and threads at set positions; shaft collars and clamping rings have a bore, a set-screw or clamp thread and a keyway; bushings and sleeves are bored to a running fit. Standard fasteners — screws, bolts, nuts and washers — are covered on their own pages such as our custom screws and custom washers. Flanges, adaptors and plate fittings round out the range. Where a drawing starts from a standard geometry and changes one feature — a longer thread, a smaller bore, a shoulder added — we treat it as a standard part modified to your drawing, which usually costs less and arrives faster than a fully bespoke part.