Our products

Stitching wires

We make flat stitching wire for corrugated boxes, books, cheque books, leaflets and printed work, in seven grades. Sizes run from 20 to 26 gauge, on spools from 2 kg for hand and bindery work up to 25 kg for automatic machines.

We use good quality raw material and modern galvanising and flattening machines, and we draw our own wire from rod, so the size stays the same from the start of a reel to the end. Every reel is checked during production and again before dispatch, to keep rejections close to zero. Every grade runs on manual, semi automatic and fully automatic stitching machines such as Insun, Gods Will and MEPL.

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Reels of flat galvanised stitching wire — Stitching wires

All grades at a glance
Grade	Base metal	Coating	Coating weight	Tensile	Corrosion life	Relative cost
Galvanised (G.I.)	Mild steel	Electro zinc	8 to 12 g/m²	700 to 900 N/mm²	Low	Baseline
Rust resistant (R.P.)	Mild steel	Heavy electro zinc	18 to 25 g/m²	700 to 900 N/mm²	Moderate	1.1×
Power G.I.	Mild steel	Maximum electro zinc	30 to 40 g/m²	700 to 900 N/mm²	High	1.3×
Copper coated	Mild steel	Electro copper	6 to 10 g/m²	700 to 900 N/mm²	Low to moderate	1.25×
Stainless steel	Stainless, solid	None required	None	On request	Immune to red rust	On request
Pure brass	Copper and zinc alloy	None required	None	620 to 780 N/mm²	Immune	7×
Pure copper	Electrolytic copper	None required	None	380 to 520 N/mm²	Immune	7.8×

Relative cost is per kilogram and changes with metal prices. Per stitch the difference is much smaller. Use the cost per pin calculator to work it out for your own boxes.

Prime Wires galvanised flat stitching wire on a 25 kg reel

01 · Most popular

G.I. stitching wire

G.I. stitching wire is mild steel wire coated with zinc and rolled flat. It is the stitching wire most used by corrugated box makers in India, and the best value choice for cartons that are kept dry and opened within a few weeks.

FMCG cartons Dry storage Local distribution

View full details Cost per pin

G.I. stitching wire: technical specification
Property	Value
Base metal	Low carbon mild steel
Coating	Electro galvanised zinc
Coating weight	8 to 12 g/m²
Tensile strength	700 to 900 N/mm²
Elongation	2 to 6%
Flat sections	20 to 26 gauge, 0.90 × 2.20 mm to 0.45 × 1.15 mm
Thickness tolerance	± 0.02 mm
Width tolerance	± 0.05 mm
Finish	Bright silver
Corrosion life	Low, dry storage only
Relative cost / kg	Baseline
Spools	2, 5, 15, 25 kg, core to customer specification
Packing	Shrink wrapped and palletised; VCI on request for export

Prime Wires rust resistant (R.P.) flat stitching wire on a reel

02 · Heavier zinc coating

Rust resistant stitching wire

Rust resistant stitching wire, known in the trade as R.P. wire, has the same steel core as G.I. wire but a much heavier zinc coating. It resists rust for longer, which suits the monsoon season, storage without humidity control and cartons that are stored for months before they ship.

Monsoon storage Seasonal stock Long inland transit

View full details Cost per pin

Rust resistant stitching wire: technical specification
Property	Value
Base metal	Low carbon mild steel
Coating	Heavy electro zinc
Coating weight	18 to 25 g/m²
Tensile strength	700 to 900 N/mm²
Elongation	2 to 6%
Flat sections	20 to 26 gauge
Thickness tolerance	± 0.02 mm
Width tolerance	± 0.05 mm
Finish	Bright silver
Corrosion life	Moderate
Relative cost / kg	1.1×
Spools	2, 5, 15, 25 kg
Packing	Shrink wrapped and palletised; VCI on request for export

Prime Wires Power G.I. heavy zinc flat stitching wire on a reel

03 · Heaviest zinc coating

Power G.I. stitching wire

Power G.I. stitching wire, also called rust resistant power stitching wire, has the heaviest zinc coating of all our stitching wires. It is the costliest of our galvanised grades, and the best at resisting rust.

Coastal warehousing Long inland transit Extended storage

View full details Cost per pin

Power G.I. stitching wire: technical specification
Property	Value
Base metal	Low carbon mild steel
Coating	Maximum electro zinc
Coating weight	30 to 40 g/m²
Tensile strength	700 to 900 N/mm²
Elongation	2 to 6%
Flat sections	20 to 26 gauge
Thickness tolerance	± 0.02 mm
Width tolerance	± 0.05 mm
Finish	Bright silver
Corrosion life	High
Relative cost / kg	1.3×
Spools	5, 15, 25 kg
Packing	Shrink wrapped and palletised; VCI on request for export

Prime Wires stainless steel flat stitching wire, magnetic and nonmagnetic grades

04 · Solid stainless steel

Stainless steel stitching wire

Solid stainless steel stitching wire with no coating to wear off. It comes in two types: magnetic (ferritic), which metal detectors can find, and nonmagnetic (austenitic), used where magnetism is a problem.

Food packaging Pharmaceutical cartons Premium print Metal detected lines

View full details Ask us which type to use

Stainless steel stitching wire: technical specification
Property	Value
Base metal	Stainless steel, solid, no coating
Grades offered	Ferritic (magnetic, 430 type) and austenitic (nonmagnetic, 304 or 302 type)
Magnetic response	Ferritic: magnetic in all conditions. Austenitic: nonmagnetic annealed, slight response after cold work
Tensile strength	On request
Elongation	On request
Flat sections	22 to 26 gauge
Thickness tolerance	± 0.02 mm
Width tolerance	± 0.05 mm
Finish	Bright / matt
Corrosion life	Immune to red rust; austenitic superior in chloride and sustained humidity
Relative cost / kg	On request
Spools	On request
Packing	Shrink wrapped and palletised

Where a row lists options, please tell us which one you need when you enquire.

Prime Wires copper coated flat stitching wire on a spool

05 · Copper finish

Copper coated stitching wire

Mild steel wire with a copper coating. On a finished carton or a book spine it looks like solid copper at a much lower cost, and the smooth coating feeds easily through the machine.

Presentation packaging Book work Retail facing cartons

View full details Cost per pin

Copper coated stitching wire: technical specification
Property	Value
Base metal	Low carbon mild steel
Coating	Electro copper
Coating weight	6 to 10 g/m²
Tensile strength	700 to 900 N/mm²
Elongation	2 to 6%
Flat sections	22 to 26 gauge
Thickness tolerance	± 0.02 mm
Width tolerance	± 0.05 mm
Finish	Bright red gold
Corrosion life	Low to moderate
Relative cost / kg	1.25×
Spools	2, 5, 15 kg
Packing	Shrink wrapped and palletised

Prime Wires pure brass flat stitching wire on a reel

06 · Cannot rust

Pure brass stitching wire

Pure brass stitching wire is made from a solid copper and zinc alloy, with no steel at all. There is no coating to wear off and nothing underneath to rust.

Export cartons Pharma & food Retail facing Long sea legs

View full details G.I. vs brass compared

Pure brass stitching wire: technical specification
Property	Value
Base metal	Copper and zinc alloy, solid
Coating	None required
Coating weight	Not applicable
Tensile strength	620 to 780 N/mm²
Density	8.50 g/cm³
Flat sections	22 to 26 gauge
Thickness tolerance	± 0.02 mm
Width tolerance	± 0.05 mm
Finish	Bright yellow
Corrosion life	Immune, tarnishes cosmetically but cannot rust
Relative cost / kg	7×
Spools	2, 5, 15, 25 kg
Packing	Shrink wrapped and palletised; VCI not required

Prime Wires pure copper flat stitching wire on a spool

07 · Softest clinch

Pure copper stitching wire

Pure copper stitching wire is made from solid electrolytic copper. Like brass, it cannot rust because it contains no iron. Over time it darkens to a natural patina, which stays on the surface and does not stain the carton. It costs about the same as brass.

Multiwall board Premium binding Older stitching heads

View full details Cost per pin

Pure copper stitching wire: technical specification
Property	Value
Base metal	Electrolytic copper, solid
Coating	None required
Coating weight	Not applicable
Tensile strength	380 to 520 N/mm²
Density	8.90 g/cm³
Flat sections	22 to 26 gauge
Thickness tolerance	± 0.02 mm
Width tolerance	± 0.05 mm
Finish	Rich red
Corrosion life	Immune, patinates cosmetically but cannot rust
Relative cost / kg	7.8×
Spools	2, 5, 15 kg
Packing	Shrink wrapped and palletised

Bindery

Book stitching wire

Round wire used by the printing and notebook industry to bind books, leaflets, catalogues and cheque books, and for spiral and Wire O binding. Supplied on spools or in coils, as you need.

It has a bright finish and even tensile strength, and runs on manual, semi automatic and fully automatic book stitching machines such as LineOmatic, Bielomatik, Muller Martini, ECH Will and JoyDzign.

Exercise books Notebooks Textbooks Duplicate and triplicate books Magazines Catalogues Cheque books

Narrow flat stitching wire

We also make narrow flat wire for book stitching. Many book binders and printers abroad use flat wire because it grips a wider area of the spine, is less likely to cut through thin covers, and gives a binding that lasts longer. Your stitching head must be suitable for flat wire, so please check before ordering.

Request a sample

Prime Wires book stitching wire on bindery spools

Book stitching wire on spools

Book stitching wire: packing
Pack	Details
Plastic spools	1 to 250 kg, or as you need
2 kg spools	Each spool in polythene, 12 spools per carton (24 kg)
5 kg spools	Each spool in polythene, 4 spools per carton
15 kg spools	Each spool in polythene, packed one per carton
Coils	1 to 100 kg, or as you need
1.6 kg coils	Each coil in polythene, 18 coils per carton (28.80 kg)

Narrow flat stitching wire: specification
Property	Value
Grades available	Galvanised, copper coated, pure brass, pure copper
Flat sections	24 to 26 gauge
Spools	2 and 5 kg
Head requirement	Must be suitable for flat wire
Stainless steel option	On request

Also made

Staple pin wire

Mild steel wire with a zinc coating applied by electro galvanising, used to make staple pins. Tell us the size and quantity you need and we will send you a quote.

Ask for a quote

More products

Our other product ranges

Steel wires for industry, and wire products: wire nails, wire ropes and springs.

Steel wires →Wire products →