19.5x21 Gauge 037031C Brass Stitching Wire is a flat stitching wire designed for carton stitching, box stitching, book binding, booklet making, side stitching, saddle stitching, corner stitching and inline press stitching. The featured size is 0.037 x 0.031 inch, equal to 0.95 x 0.80mm, with a recommended work thickness of 1/2 inch to 1 inch.
KYA brass stitching wire is made from low carbon steel with a brass or galvanized surface finish. It is engineered for smooth de-spooling, consistent color, clean surface, no flaking, no kinks, reliable tensile strength and stable operation in high-speed stitching machines.
High-quality stitching wire depends on finish quality, wire size, cast, camber, tensile strength, wire path, spool size and de-spooling equipment. KYA 19.5x21 Gauge 037031C brass stitching wire is designed to feed smoothly from the spool and form consistent stitches in cardboard cartons, packaging boxes, books and printed materials.
19.5 x 21 flat wire size: 0.037 x 0.031 inch / 0.95 x 0.80mm for medium-duty stitching work.
Brass coating: Provides a clean appearance, smooth surface and improved rust resistance.
Low carbon steel core: Offers reliable forming and consistent stitch quality.
650–950 N/mm² tensile strength: Supports dependable stitching performance without excessive machine wear.
±0.05mm tolerance: Helps maintain stable feeding and predictable stitching results.
2kg to 100kg spool options: Suitable for printing plants, carton factories and packaging production lines.
| Attribute | Details |
|---|---|
| Product Name | 19.5x21 Gauge 037031C Brass Stitching Wire |
| Model | 19.5x21 Gauge .037 x .031 Inch |
| Brand | KYA |
| Material | Low Carbon Steel |
| Surface | Brass Coated / Copper Plated; galvanized option available |
| Featured Size | 0.037 x 0.031 inch / 0.95 x 0.80mm |
| Wire Dimension Range | 0.80mm x 0.50mm to 2.50mm x 0.50mm; custom specifications available |
| Tensile Strength | 650–950 N/mm² |
| Tolerance | ±0.05mm |
| Packing | 2kg, 3.5kg, 10kg, 15kg and 100kg spools |
| Applications | Cardboard packaging boxes, cartons, books, side stitching, saddle stitching, corner stitching, booklet making and inline press stitching |
| Wire Diameter | Size (Inches) | Size (mm) | Feet per Pound | Recommended Thickness of Work |
|---|---|---|---|---|
| 18 x 20 | 0.047 x 0.035 | 1.20 x 0.90 | 221 | 5/8"–2" |
| 19 x 21.5 | 0.041 x 0.030 | 1.05 x 0.75 | 283 | 1/2"–1" |
| 19.5 x 21 | 0.037 x 0.031 | 0.95 x 0.80 | 283 | 1/2"–1" |
| 20 x 24 | 0.035 x 0.023 | 0.90 x 0.60 | 408 | Up to 3/16" |
| 20 x 25 | 0.035 x 0.021 | 0.90 x 0.55 | 455 | 1/8"–5/8" |
| 21 x 25 | 0.031 x 0.021 | 0.80 x 0.55 | 559 | 1/16"–1/2" |
| Wire Gauge | German Wire Gauge (mm) | m/kg | ASWG (mm) | m/kg | ft/lb | BWG (mm) | m/kg | ft/lb |
|---|---|---|---|---|---|---|---|---|
| 21 | 0.80 | 253 | 0.81 | 247 | 368 | 0.81 | 247 | 368 |
| 22 | 0.75 | 288 | 0.73 | 304 | 452 | 0.71 | 322 | 479 |
| 23 | 0.65 | 331 | 0.65 | 384 | 571 | 0.63 | 409 | 609 |
| 24 | 0.60 | 451 | 0.58 | 482 | 717 | 0.56 | 517 | 769 |
| 25 | 0.55 | 536 | 0.52 | 600 | 893 | 0.51 | 624 | 929 |
| 26 | 0.50 | 649 | 0.46 | 767 | 1141 | 0.46 | 767 | 1141 |
| 27 | 0.45 | 801 | 0.44 | 838 | 1247 | 0.41 | 965 | 1436 |
| 28 | 0.40 | 1014 | 0.41 | 965 | 1436 | 0.36 | 1252 | 1863 |
| 29 | 0.37 | 1185 | 0.38 | 1123 | 1671 | 0.33 | 1489 | 2216 |
| 30 | 0.35 | 1324 | 0.36 | 1252 | 1863 | 0.30 | 1802 | 2682 |
Clean and contamination-free wire: Helps reduce machine jams and improves stitching quality.
Consistent color and smooth surface: Supports stable feeding in carton stitching and book binding machines.
No flaking protective coating: Helps keep the stitching head cleaner during high-speed operation.
Free flow from spool: Reduces the risk of dropping off the spool, twisting or inconsistent feeding.
No kinks or bends: Helps maintain stable stitch formation and reduces production downtime.
Ideal for extra-strong stitching: Suitable for corrugated cartons, packaging furniture, mattresses and machine parts.
19.5x21 Gauge 037031C Brass Stitching Wire is used in packaging, printing and bookbinding production where smooth feeding, consistent tensile strength and strong stitch formation are required.
Cardboard packaging boxes and corrugated cartons
Side stitching for packaging and printed materials
Saddle stitching for booklets and catalogs
Corner stitching for cartons and box assembly
Book binding and booklet making
Inline press stitching in printing plants
Packaging for furniture, mattresses and machine parts
| Selection Point | What to Check | Recommendation |
|---|---|---|
| Wire Size | Machine requirement, carton thickness and stitch strength | Use 19.5 x 21 / 0.037 x 0.031 inch for 1/2"–1" recommended work thickness. |
| Tensile Strength | Stitch forming, cutting performance and machine wear | Choose 650–950 N/mm² according to carton thickness and machine setup. |
| Surface Finish | Rust resistance, appearance and machine cleanliness | Brass coating is suitable for clean appearance and smooth operation; galvanized coating is available for alternative requirements. |
| Spool Size | Machine spindle, production volume and changeover frequency | Choose 2kg, 3.5kg, 10kg, 15kg or 100kg spools according to production line requirements. |
It is used for stitching cardboard packaging boxes, corrugated cartons, books, booklets and printed materials. Common applications include side stitching, saddle stitching, corner stitching, booklet making and inline press stitching.
The size is 0.037 x 0.031 inch, equal to approximately 0.95 x 0.80mm. It is recommended for work thickness from 1/2 inch to 1 inch.
The tensile strength range is 650–950 N/mm². The correct tensile strength helps the wire form a stable stitch without being too soft or too hard for the stitching machine.
Brass coated, copper plated and galvanized stitching wire options are available. Brass coating provides a clean appearance and smooth surface, while galvanized coating is available for different machine and packaging requirements.
Standard spool options include 2kg, 3.5kg, 10kg, 15kg and 100kg spools. Custom spool and packing requirements can be discussed according to machine setup and order quantity.
Use clean stitching wire with correct size, smooth surface, no flaking, no kinks and stable tensile strength. Also confirm the machine setup, wire path, spool position, de-spooling equipment and stitching head condition.
Yes. KYA can discuss custom wire size, tensile strength, coating, spool weight, packing, OEM label and shipment requirements based on your stitching machine and production application.
KYA Fasteners supplies wire products, stitching wire, binding wire, nails, staples, hog rings, tools and industrial fastening solutions for global customers. For printing and packaging applications, KYA offers brass stitching wire, galvanized stitching wire, flat stitching wire, round stitching wire and custom spool packing.
Contact KYA to get factory-direct pricing for 19.5x21 Gauge 037031C Brass Stitching Wire, including wire size, tensile strength, coating, spool size, sample availability, bulk order quantity and shipping schedule.
