18GA 8.9mm Medium Crown
92 Series Staples

Medium crown balances grip and material safety.

18 GA precise wire ensures steady penetration.

Standard sizing fits universal staple tools.

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Sinsun 92 Series Staples | 18GA ASTM Standard 8.9mm Medium Crown Staples with 6-16mm Full Leg Length for Medium-Duty Woodworking & Upholstery

Premium Sinsun 92 Series Staples comply with ASTM 18GA standard, featuring 8.9mm ±0.2mm medium crown, 1.25mm wire diameter and 1.00mm leg thickness. Medium-duty industrial staples ideal for woodworking, upholstery and general construction fastening. Factory bulk wholesale and custom OEM solutions for global B2B buyers.

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Sinsun 92 Series Staples Definition, Functions & Brand Differentiation

92 Series Staples are ASTM standard 18GA thick wire medium crown industrial fasteners for universal medium-duty fastening jobs. This staple series combines flexible penetration and stable hold power thanks to the industry-standard 8.9mm ±0.2mm outside medium crown, 1.25mm ±0.02mm wire diameter and 1.00mm ±0.02mm leg thickness. It fills the performance gap between fine-wire narrow crown staples and heavy thick-wire wide crown staples, and is the preferred fastening solution for general woodworking, furniture upholstery, light construction and decorative material fixation.

Sinsun manufactures standardised 92 Series staples with high-tensile low-carbon steel and corrosion-resistant alloy raw materials professionally. Every staple piece is created by integrated hot-forging forming and multi-stage edge finishing craftsmanship. Each manufactured staple is with an even wire thickness, fully closed crown structure and ultra sharp reinforced tips. This solves effectively common industrial problems such as insufficient holding force, staple bending and loose fixation caused by low grade industrial staples.

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92 Series Staples — 18 Gauge Medium Crown Fasteners for Senco, Hitachi, BeA & Bostitch Pneumatic Tools

Sourcing 92 series staples that feed clean through your Senco or Hitachi pneumatic gun? Sinsun delivers 18 gauge 5/16″ medium crown staples from 10mm to 40mm leg lengths. Anti‑jam collation, galvanized rust protection, and full compatibility from a certified Chinese fastener manufacturer.

9210 Staples (10mm leg)

The smallest leg in our line of precision fasteners, the 92 series. Perfect for attaching light fabric to the bottoms of chairs, holding down dust covers under sofas and holding down thin vinyl panels where a longer staple will show through to the visible side. The 18 ga. wire is strong enough for everyday use, but not so heavy-duty that it will split the fasteners. Dining chair and accent piece upholstery shops often order 9210 as their go-to length for final assembly.

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9212‑9215 Staples(12‑15mm leg)

This medium leg range is suitable for most furniture upholstery applications. Fasten 1-inch foam padding to wooden sofa frames using 9212 staples; the leg length pierces the foam and embeds itself firmly into the frame without bottoming out. Jute webbing across the bottom of sofas is fastened with 9215 staples. Here, the staples go in deeper to keep the webbing tight for years of use. Furniture manufacturers frequently standardise on this range for everyday use.

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9216‑9220 Staples(16‑20mm leg)

Legs of all kinds, trusted by cabinet and furniture assembly lines for joining structure. Provide back panels from 6mm to 9mm plywood attached to cabinet carcasses; the 18 gauge wire has enough shear strength to allow stable joinery with no visible fasteners on finished surfaces. 9220 staples also work for assembling drawer boxes where the joint requires deeper penetration through two layers of 9mm hardwood. For flat-pack furniture manufacturers, the assembly line standard is often 9218-9220.

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9222‑9228 Staples (22‑28mm leg)

These longer legs give you the bite you need for heavier woodworking applications. Attach 12mm plywood gables to cabinet frames Fasten decorative trim to face frames or attach moulding to soffit areas The 22-28mm leg length allows sufficient penetration for tight fitting framing joints and the medium crown transfers the clamping force to avoid splitting in hardwood.

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9230‑9235 Staples (30‑35mm leg)

Packaging lines assembling wooden export crates and light pallets rely on these longer legs. You hammer the 12mm pine deck boards into 25mm stringers. The staple penetrates the two depths with enough remaining bite to clinch securely inside the stringer wood. 5/16′′ Medium Crown prevents the fastener from pulling through the deck board when the crate is handled during freight. The manufacturers of export crates and the pallet shops will usually order 9230-9235 as their assembly standard.

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9240 Staples(40mm leg)

The longest leg in the 92 series family. Designed for securing 2x lumber to concrete forms where critical penetration depth is needed for holding power, or for attaching double layers of 15mm plywood to 25mm framing members, or for assembling thick wooden containers. The 9240 gives you the grip you need for packaging operations that handle multiple laminations, without having to move to heavier-gauge fasteners.

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Sinsun 92 Series Staples Full Size Chart & Industrial Technical Specifications

Check full standardized size dimensions, wire gauge, crown width and industrial parameters of Sinsun 92 Series Staples for accurate industrial model selection.

Available Leg Lengths — Complete 92 Series Range

Model Code	Leg Length (mm)	Leg Length (inch)	Strips per Box	Staples per Box
9210	10mm	3/8″	70 strips	10,000
9212	12mm	1/2″	70 strips	10,000
9215	15mm	5/8″	70 strips	10,000
9218	18mm	11/16″	70 strips	10,000
9220	20mm	3/4″	70 strips	10,000
9222	22mm	7/8″	70 strips	10,000
9225	25mm	1″	70 strips	10,000
9228	28mm	1‑1/8″	60 strips	7,500
9230	30mm	1‑3/16″	60 strips	7,500
9235	35mm	1‑3/8″	60 strips	7,500
9240	40mm	1‑9/16″	50 strips	5,000

Standard Technical Data — Sinsun 92 Series Galvanized Staples

Parameter	Specification
Staple Series	92 Series (18 gauge medium crown)
Crown Width (Outside)	8.9mm ± 0.2mm (5/16 inch industry equivalent)
Wire Gauge	18 GA (ASTM standard)
Wire Diameter	1.25mm ± 0.02mm
Leg Thickness	1.00mm ± 0.02mm
Wire Material	Q195 low‑carbon steel (cold‑drawn)
Surface Finish	Electro‑galvanized zinc coating (double‑layer)
Coating Thickness	5‑8 microns per side
Point Type	Chisel cut, 35‑40° angle
Collation Method	Heat‑activated adhesive‑bonded paper tape
Tensile Strength	90‑105 kg/mm² (after cold drawing)
Hardness	HRB 70‑85
Salt Spray Resistance	96 hours NSS (ASTM B117 standard)
Standard Pack Count	60‑70 staples per strip × 5,000‑10,000 staples per box

Where 92 Series Staples Deliver — Upholstery, Furniture, Packaging & More

Sofa upholstery, cabinet back panel attachment, wooden crate assembly, furniture frame construction, drawer assembly, and packaging applications. Six specific scenarios where Sinsun 92 series staples provide faster cycles, cleaner finishes, and stronger holds.

Sofa & Armchair Upholstery

●Fabric is stapled to wooden sofa frames at upholstery shops with a staple that is flush and does not mar the exposed surface. Our 9215‑9220 staples (15‑20mm leg) pass through 2‑inch foam padding and jute webbing, then are firmly set in kiln‑dried hardwood frames. The 18 gauge wire is strong enough to punch through tough foam without kinking, and the 5/16″ medium crown distributes clamping force over the fabric to prevent tearing. The chisel point doesn't cut the weave, it splices it leaving the visible side clean and ready for rework. Sinsun 92 series staples in upholstery production lines cut fabric tears and boost per-chair cycle times.

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Cabinet Construction

●9225 staples (25mm leg) are used by flat-pack kitchen cabinet makers to fix back panels of 6mm to 9mm plywood to cabinet carcasses. The 18 gauge wire has sufficient shear strength for secure joinery, with no fastener heads showing on finished surfaces. The medium crown geometry is flush with the back panel, so the cabinet will be flush with the wall during final installation. Our precision collation means a consistent leg alignment, so every staple drives straight - no crooked legs sticking through the exposed interior of the cabinet.

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Wooden Crate Assembly

● Fasteners are needed that hold through ocean freight vibration for packaging lines that assemble wooden export crates for machinery and industrial equipment. Our 9230-9235 staples (30-35mm leg) go through 12mm pine deck boards and into 25mm stringers. The chisel point creates a clean flat clinch inside the stringer wood. The 5/16″ medium crown prevents the fastener from pulling through the deck board when the crate is handled by forklifts or stacked in warehouse racks. The adhesive collation makes sure each strip feeds straight through your pneumatic gun, so your packaging line doesn’t stop for jam clearing every few crates.

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Furniture Frame Assembly

●Kiln dried hardwood furniture makers use 92189222 staples (1822mm) to assemble joints when building sofa frames and chair carcasses. This length of leg provides enough bite for 15mm-18mm frame members without splitting the wood grain, a common problem with nails or heavier gauge fasteners. The chisel point design splits wood fibres instead of crushing them, maintaining the strength of the joint through the life of the furniture. Our 92 series staples have a galvanised coating that is corrosion resistant even if the frames are stored in humid warehouse conditions prior to final upholstery.

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Global Verified Industrial Client Testimonials for Sinsun 92 Series Staples

Read real localized reviews from European, African, Oceanian and Central Asian industrial clients on Sinsun 92 Series Staples’ heavy-duty performance and quality stability.

For building insulation projects, we use Sinsun 92 Series Staples. The wide crown design holds the insulation boards tight, and they don't fall off even in strong wind seasons.

Florian | Austria

These 92 Series staples are very good for large carpet laying. Flat flooring finish and greatly reduces post-sale maintenance problems due to uniform sizing.

Jade | New Zealand

“Sinsun batch quality is very uniform.” In bulk orders, we have no deformed or unqualified staples, so we save huge sorting and replacement costs.

Arman | Kazakhstan

For yacht interior refitting, we use Sinsun 316 stainless steel 92 Series Staples. No rust after years of use in humid marine environments.

Davor | Croatia

92 Series high hardness staples work well in our automated production lines. No jamming accidents occur. The efficiency of our daily output has been greatly improved.

Sofia | Owns

From Romanian Upholstery Shops to South African Packaging Lines — Why They Chose Sinsun 92 Series Staples

Q: What is the “92 series” for staples?

A.The 92 Series is a medium crown, 18 gauge staple family with a crown width of 5/16 inch (8.9mm). Leg length ranges from 10mm to 40mm. This is a common industrial fastener spec for pneumatic finishing staplers , not the name of a brand.

Q: What finishes are available for 92 series staples?

A: Electro‐galvanized zinc is our standard finish for interior furniture and covered exterior applications. We also offer stainless steel 304 and custom coatings like copper and black finishes on request for large OEM contracts.

Michelle T.

There is a need for stainless steel coach bolts on coastal Queensland decks. Other suppliers sell us A2 (304) that pits after 2 years. sinsun is selling the real A4-80 with certificates. In the past five years, nothing has corroded on our client's fasteners.“We are moving all the marine work to Sun.

Q. I want to staple roofing felt or house wrap with 92 series staples - is this OK?

A: Yes, for lighter duty applications, like attaching felt underlayment and house wrap For continuous insulation layers or heavy duty sheathing, you might want to consider a heavier gauge wide crown series such as P series (16 gauge, 1″ crown).

Q: How do I know a 92 series staple will fit my pneumatic stapler?

A. Your tool’s magazine will have the crown width specification. The majority of medium crown pneumatic finishing staplers accept 5/16″ (8.9 mm) 92 series staples. Note: Before selecting model numbers, check the leg length range in your tool’s manual and make sure the wire gauge is appropriate (18 GA is standard for the 92 series).

Michelle T.

Q: Why do my 92 series staples keep jamming in my pneumatic stapler?

A: Low quality binding glue (cheap brands), bent legs due to rough handling or incorrect crown width are three typical causes. Sinsun utilises heat activated adhesive films with humidity resistant integrity, uniform leg positioning with a ±0.1mm parallelism tolerance and accurate 8.9mm crown width.

Q: What's the difference between 92 series and 80 series staple?

A: The width of the crown, wire gauge, scope of application. 92 series uses 5/16″ (8.9mm) medium crown, 18 gauge wire — ideal for furniture assembly, cabinet backs, upholstery and trim. 80 series is generally bigger and has a different crown width . Both are used for upholstery but different lengths of leg are available.

Michelle T.

Q: Will Sinsun 92 series staples be suitable for BeA and Bostitch staplers?

A. Yes. Our 92 series staples are manufactured to the same 18 gauge, 5/16″ crown specification as the BeA 92/SL5035 series, Bostitch SL5035, Senco medium wire finish staplers, Hitachi N3824A and most standard 18 gauge medium crown pneumatic tools. Direct compatibility, no tool modification needed.

Q: How do I determine the correct 92 series staple leg length for my material?

A: The industry rule of thumb is to make the leg length about 2 to 2.5 times the total thickness of material. 9212-9215 (12-15 mm) for 6 mm plywood or foam to frame upholstery. For 12mm cabinet backs use 9225 (25mm) Test on scrap material before full production runs to verify clinch performance.

Michelle T.

Sinsun 92 Series Staples Packaging Options — B2B Bulk Cartons, Retail Boxes & OEM Labels

Choose how your 92 series staples arrive. Export cartons for furniture factories, printed retail boxes for hardware store shelves, and private label packaging with your brand colors. Heat‑activated adhesive collation strip packaging for jam‑free feeding.

Bulk Export Carton (Wholesale)	Furniture factories, upholstery shops, cabinet manufacturers ordering by the pallet.	Neutral brown corrugated master carton. 10 inner boxes × 5,000‑10,000 staples each (50,000‑100,000 staples per master carton). Includes moisture‑barrier liner for sea freight protection.
Retail Carton (Shelf Display)	Hardware stores, building supply retailers, upholstery supply shops.	Printed four‑color box with hang tab. Leg length and crown width clearly displayed on all four sides. Sealed against dust for extended shelf life.
Plastic Strip Tray (Work Site)	Mobile upholstery crews and field service trucks where staples need to stay organized.	Reclosable tray with divider inserts. Holds 5,000 staples sorted by leg length. Fits inside truck bed toolboxes and job site gang boxes.
OEM Private Label Carton	Resellers, brand owners, and large furniture manufacturers requiring custom packaging.	Custom print on kraft or white board. We match your PMS colors, logo placement, and packaging language. Minimum order quantity available for custom runs.
Full Pallet Load (High Volume)	Just‑in‑time delivery contracts for factories and major furniture manufacturers.	Shrink‑wrapped pallet with edgeboard reinforcement. Stacked for warehouse racking. Includes batch numbers and Certificate of Analysis with each pallet. 60‑75 cartons per pallet, 24 pallets per 20‑foot full container.
Small Sample Box (Evaluation)	B2B buyers testing product quality before committing to bulk orders.	500‑staple sample pack. Includes three leg lengths for customer testing. Free of charge for qualified commercial inquiries.

Quality Control Checks Before Any Batch Ships

Every production batch of Sinsun 92 series staples undergoes the following laboratory validation:

Wire tensile pull test

we reject any coil below 90 kg/mm²
Crown width measurement

8.9mm ±0.2mm verified with optical comparator
Leg parallelism inspection

crooked staples never reach the box (±0.1mm tolerance over 25mm length)
Collation adhesive integrity check

strip separation force measured at 2‑3 kg per strip
Galvanized coating thickness

X‑ray fluorescence scanning (5‑8 microns per side)
Salt spray chamber test

96 hours NSS per ASTM B117 (standard finish)
Drive test through 6mm plywood + fabric

sampled from every 5,000 staples
We issue a Certificate of Analysis with each pallet order.

Your quality assurance team receives the batch‑level data required for ISO supplier audits without chasing our team for weeks.

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92 Series Staples

18GA 8.9mm Medium Crown
92 Series Staples

Sinsun 92 Series Staples | 18GA ASTM Standard 8.9mm Medium Crown Staples with 6-16mm Full Leg Length for Medium-Duty Woodworking & Upholstery

Sinsun 92 Series Staples Definition, Functions & Brand Differentiation