Product Summary

Dài Belt Screws & Chicago Bolts (also known as Sex Bolts or Binding Posts) are engineered according to DIN 967 Và ASME B18.6.3 standards, widely used in leather goods, architectural signage, bookbinding,

and furniture assembly. Featuring a low-profile aesthetic head, these Dài Belt Screws & Chicago Bolts consist of a male screw and a female threaded post (sleeve) that join together to create a flush, secure, and

removable connection for layered materials.

• ✔ Aesthetic Flush Finish: Designed to provide a smooth, decorative appearance on both sides of the application, making them ideal for visible consumer goods.

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• ✔ Tool-Friendly Drive: Available with Slotted, Phillips, or Hex Socket drives for easy manual installation and adjustment.

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• ✔ High-Quality Materials: Dài offers premium Solid Brass for a classic look and Thép không gỉ for maximum durability and rust resistance.

Key Features of Belt Screws & Chicago Bolts

• Removable & Reusable – Unlike rivets, these bolts can be easily unscrewed for repairs, cleaning, or adding layers to the assembly.

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• Variable Grip Lengths – Available in a wide range of post lengths to accommodate material thicknesses from 2 mm to over 100 mm.

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• Chống ăn mòn – Offered in Antique Brass, Nickel Plated, and Electropolished Stainless Steel finishes for various environments.

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• Precision Fit – The smooth outer surface of the female post acts as a pivot or axle, preventing damage to soft materials like leather or plastic.

Technical Specifications

• Standards: DIN 967 / ISO 14583 / ASME B18.6.3 / Custom OEM

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• Metric Size Range: M2 to M10 (Post Diameter)

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• Inch Size Range: 1/8" to 3/8" (Post Diameter)

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• Post Lengths: 3 mm to 150 mm

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• Material: Solid Brass, Stainless Steel (A2/A4), Aluminum, Carbon Steel

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• Finish: Nickel Plated / Antique Brass / Black Zinc / Plain

• Material & Mechanical Properties

• Vật liệu	Cấp	Appearance	Strength	Ứng dụng
  Solid Brass	H62 / H65	Gold / Yellow	Medium	Fashion / Leather / Decor
  Thép không gỉ	SS304 (A2)	Silver / Matte	High	Medical / Marine / Food
  Thép không gỉ	SS316 (A4)	Silver / Bright	High	Saltwater / Chemical
  Thép Cacbon	Grade 4.8	Metallic Gray	Medium	Furniture / Hardware

• Dimensions & Global Size Conversion
• Technical Standard: Longze provides professional-grade Chicago Screws (Sex Bolts/Binding Posts) manufactured to DIN 967 and ASME B18.6.3 specifications. These two-piece fasteners consist of a threaded female post (barrel) and a matching male screw, providing a smooth, decorative finish on both sides of the assembly.

• American Size (# Gauge/Inch)	Nearest Metric Size (M)	Barrel Outer Dia. (mm/inch)	Head Diameter (dk) (mm/inch)	Available Grip Length (mm/inch)
  #6 - 32	M3.5	4.0 mm / 0.157"	8.0 mm / 0.315"	5 mm - 50 mm / 1/4" - 2"
  #8 - 32	M4	5.0 mm / 0.197"	9.0 mm / 0.354"	5 mm - 80 mm / 1/4" - 3"
  #10 - 24	M5	6.0 mm / 0.236"	10.0 mm / 0.394"	6 mm - 100 mm / 1/4" - 4"
  1/4" - 20	M6	8.0 mm / 0.315"	12.0 mm / 0.472"	10 mm - 120 mm / 3/8" - 5"
  5/16" - 18	M8	10.0 mm / 0.394"	16.0 mm / 0.630"	15 mm - 150 mm / 1/2" - 6"

• Surface Treatment

• Coating	Process	Color	Ứng dụng
  Nickel Plated	Electroplating	Bright Silver	Leather belts / Handbags
  Antique Brass	Chemical	Aged Gold	Vintage luggage / Saddles
  Black Zinc	Electroplating	Matte Black	Tactical Gear / Holsters
  Electropolished	Chemical	Mirror Silver	Medical / Signage