Product Summary

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

and furniture assembly. Featuring a low-profile aesthetic head, these Лонзе 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: Лонзе offers premium Solid Brass for a classic look and Неръждаема стомана 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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• Устойчивост на корозия – 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

• Материал	Степен	Appearance	Strength	Приложение
  Solid Brass	H62 / H65	Gold / Yellow	Medium	Fashion / Leather / Decor
  Неръждаема стомана	SS304 (A2)	Silver / Matte	High	Medical / Marine / Food
  Неръждаема стомана	SS316 (A4)	Silver / Bright	High	Saltwater / Chemical
  Въглеродна стомана	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	Приложение
  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