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Specialty Fasteners › Quarter-Turn, Captive & Panel Fasteners

Square Cage Nut Captive Nut

Updated 2026-11-04 · Markdown version

Model no. SN

US$0.048 – 6.00 / piece

MOQ 100 pieces · Final price confirmed in your quote

Material: Stainless Steel/Carbon Steel/Special Alloy/Ti
Head Style: Square
Standard: DIN, ANSI, GB, JIS
Grade: as Required
Custom: Available
Package Size: 35.00cm * 25.00cm * 20.00cm
Size: Metric coarse or specified fine threads, plus inch UNC or UNF threads. Examples include M3, M6, M10, #8-32 and 1/4-20; available sizes depend on the selected standard or design.
Finishes: Plain, Passivated, Zinc Plated, Black Oxide, Nickel Plated, Chrome Plated, Hot-Dip Galvanized and custom finishes.

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Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order.

Specifications

Customization	Available
Material	Stainless Steel/Carbon Steel/Special Alloy/Ti
Type	Square Head
Model NO.	SN
Connection	Common Bolt
Head Style	Square
Standard	DIN, ANSI, GB, JIS
Grade	as Required
Custom	Available
Lead Time	3 to 45 Days
Trade Term	EXW, Fca, Fob, CFR , CIF, DAP or DDP
Sampling	Available
Transport Package	Cartons with Waterproof Film and Wooden Frame
Specification	As Required
Origin	China
HS Code	7318160000
Production Capacity	10000 Tons/Year
Package Size	35.00cm * 25.00cm * 20.00cm
Package Gross Weight	25.000kg
Size	Metric coarse or specified fine threads, plus inch UNC or UNF threads. Examples include M3, M6, M10, #8-32 and 1/4-20; available sizes depend on the selected standard or design.
Stainless Steel	SS303, SS304, SS304L, SS316, SS316L, SS321, SS410, SS420
Duplex & Special Alloys	2205, 2507, 904L, 254SMO, Titanium, Inconel, Hastelloy, Monel
Carbon & Alloy Steel	C20, C45, 1010, 1035, 1045
Finishes	Plain, Passivated, Zinc Plated, Black Oxide, Nickel Plated, Chrome Plated, Hot-Dip Galvanized and custom finishes.
Standards	DIN 557 for standard metric square nuts and DIN 562 for thin metric square nuts. Inch-series and non-standard designs are supplied to the specified drawing.
ViaWay Global	Reliable Manufacturing Support for Global Industrial Buyers
Use	Chemical composition and material grade verification.
CNC Machining	Precision CNC turning, milling, drilling, tapping, and threading for non-standard fasteners, special alloy parts, and custom hardware components.
Cold forming	Supported for standard and semi-standard fasteners such as bolts, screws, nuts, rivets, and other formed metal parts in suitable quantities. The suitable process will be selected according to material, size, structure, tolerance, and order quantity.
Hot forging	Available for large-size fasteners, heavy-duty components, and custom hardware parts that require higher strength, durable structure, and further machining after forging.
Small-Batch Support	Low-volume, trial, and project-based production for custom fasteners, special alloy components, and drawing-based hardware parts before larger repeat orders are supported.
Stamping & Bending Support	Stamped and bent metal parts such as brackets, clips, plates, pipe clamps, and curtain wall connectors are supported. These parts can be produced according to drawings, samples, dimensions, or project requirements.
Surface Treatment	Surface treatment options include passivation, pickling, polishing, electro polishing, sand blasting, black oxide, plating, GEOMET, Dacromet and other finishes according to material grade and application requirements.
Metarials Supports	304 / 316 / 316L Stainless Steel
Category	Quarter-Turn, Captive & Panel Fasteners

Technical parameters

Size:	Metric coarse or specified fine threads, plus inch UNC or UNF threads. Examples include M3, M6, M10, #8-32 and 1/4-20; available sizes depend on the selected standard or design.
Materials:	Stainless Steel: SS303, SS304, SS304L, SS316, SS316L, SS321, SS410, SS420Duplex & Special Alloys: 2205, 2507, 904L, 254SMO, Titanium, Inconel, Hastelloy, MonelCarbon & Alloy Steel: C20, C45, 1010, 1035, 1045
Finishes:	Plain, Passivated, Zinc Plated, Black Oxide, Nickel Plated, Chrome Plated, Hot-Dip Galvanized and custom finishes.
Product Types	Standard square nuts, thin square nuts and custom heavy or oversized square nuts
Standards:	DIN 557 for standard metric square nuts and DIN 562 for thin metric square nuts. Inch-series and non-standard designs are supplied to the specified drawing.
Trade Terms	EXW, FCA, FOB, CFR , CIF or DDP.
Sample Service	Available samples can be provided for evaluation. Custom samples may involve material or tooling costs.
Packing	Bulk packed in cartons, up to 25 kg per carton, with export pallets, waterproof film, wooden cases or customized packaging.

304 / 316 / 316L Stainless Steel	General corrosion-resistant stainless steel options for standard and custom fasteners, machinery assembly, marine, outdoor, and industrial use.
Duplex 2205 / 2507	Can be reviewed for chloride, offshore, chemical, desalination, and more demanding corrosion environments when required by project conditions.
Titanium Alloy	Lightweight and corrosion-resistant material options for selected aerospace, marine, chemical, and precision equipment applications.
Nickel-Based Superalloys	Inconel 718 / 625 can be reviewed for high-temperature, high-strength, or severe chemical environments. Hastelloy and Monel options can also be reviewed for selected chemical, seawater, and marine applications
Specialty Stainless & Non-Ferrous Materials	904L, 310 / 310S, A286, 17-4PH, Nitronic 60, 254SMO, and other project-based materials can be reviewed according to requirements.
Custom Material on Request	Custom material options can be reviewed according to drawings, samples, standards, or project requirements. Final material selection should be confirmed according to drawings, standards, and service environment.

Description

Square Cage Nut Captive Nut is part of our quarter-turn, captive & panel fasteners range (Specialty Fasteners).

Key details

Type: Square Head
Standard: DIN, ANSI, GB, JIS
Material: Stainless Steel/Carbon Steel/Special Alloy/Ti
Grade: as Required
Head Style: Square
Connection: Common Bolt
Custom: Available
Trade Term: EXW, Fca, Fob, CFR , CIF, DAP or DDP

Available configurations include material, head style, standard, grade and custom. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 100 pieces at US$0.048 – 6.00 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you.

Frequently asked questions

What is the minimum order quantity (MOQ) for Square Cage Nut Captive Nut?

The listed minimum order is 100 pieces, at US$0.048 – 6.00 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size.

What are the main specifications of Square Cage Nut Captive Nut?

Type: Square Head; Standard: DIN, ANSI, GB, JIS; Material: Stainless Steel/Carbon Steel/Special Alloy/Ti; Grade: as Required; Head Style: Square; Connection: Common Bolt. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include material, head style, standard, grade and custom. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing.

What is the lead time and how is it shipped?

Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment.

Which other quarter-turn, captive & panel fasteners are available?

The Quarter-Turn, Captive & Panel Fasteners category lists 403 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/specialty-fasteners/quarter-turn-captive-panel-fasteners/

How we work

Specified, checked and shipped by Engineering Hardware & Fasteners

Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing.

DIN, ISO, ASTM, ANSI, JIS and GB standard parts
Non-standard parts made to your drawing
Dimensions, thread gauges and plating checked before packing
Export cartons and pallets, consolidated mixed orders
Samples available for approval before mass production

More about us → · Request a sample or custom quote →

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US$0.048 – 6.00MOQ 100 piecesGet a quote WA