About This Tool

The SBS Fastener Finish Guide is an interactive fastener coating reference tool built by Specialty Bolt and Screw (SBS). It is designed for design engineers, manufacturing engineers, quality engineers, and procurement professionals who need fast, reliable access to fastener surface finish data during specification, sourcing, and inspection workflows. Whether you are selecting a zinc electroplate for a high-volume production fastener or evaluating a specialty coating for a corrosive marine environment, this tool puts the information you need in one place without requiring a subscription or standards library access.

The guide is organized across two tabs. The Finish Guide tab presents all finishes grouped by process category, including Electroplate and Electrodeposit Coating, Hot Dip Galvanized (HDG), Mechanical Plating, Zinc Flake Coating, Black Oxide, Passivation, Phosphate, and Specialty Coatings and Treatments. Users can narrow results using four filter controls -- Category, HE Risk, RoHS Compliance, and Relative Cost -- or search by keyword across finish name, code, conversion type, standard, and description. The Best Practice tab provides a structured, step-by-step finish selection decision framework covering environment definition, base material constraints, regulatory compliance, hydrogen embrittlement risk, and cost trade-off analysis.

Each finish card displays the finish name and process subtitle, an HE Risk badge (indicating hydrogen embrittlement risk level), a RoHS compliance indicator, and a Relative Cost rating. A detail table within the card lists individual finish Codes, Thickness values, Conversion Layer type, and White Rust / Red Rust salt spray resistance in hours. A Typical Call Out block shows the standard specification string as it would appear on an engineering drawing or purchase order. The governing Standard is cited on every card. Users can select up to four finishes and launch a side-by-side Compare view that aligns all attributes in a single table for rapid evaluation.

This fastener coating reference tool supports a wide range of engineering and procurement workflows. During BOM review, engineers can quickly verify that a specified finish meets environmental and regulatory requirements for the application. For supplier communication, the Typical Call Out field provides the exact drawing callout language needed to place an unambiguous finish requirement on a purchase order or engineering change notice. Teams performing incoming inspection planning can use the salt spray resistance values to confirm test acceptance criteria align with the specified coating class. When evaluating equivalent or alternate finishes for cost reduction or supply chain flexibility, the side-by-side compare feature accelerates decision-making without manual cross-referencing of multiple data sheets.

The SBS Finish Guide references standards from multiple organizations relevant to industrial and automotive fastener finishing. Corrosion protection requirements and test methods are drawn from ASTM specifications including ASTM F1941 (electrodeposited coatings on threaded fasteners), ASTM F1136 (zinc or aluminum-coated hex bolts), ASTM B695 (mechanical zinc deposit), and ASTM A153 / ASTM A153M (hot dip galvanized). Passivation requirements reference ASTM A967 and QQ-P-35C. Anodization is covered under MIL-A-8625, black oxide under MIL-DTL-13924D, and zinc-nickel automotive coatings under GM6046M. International equivalents under ISO are noted where applicable, including ISO 12683 for mechanically deposited zinc coatings.

Disclaimer: The data presented in this tool is based on published standards and SBS field experience and is provided for engineering reference purposes only. Corrosion resistance values such as salt spray hours represent typical performance under controlled laboratory conditions and may vary based on part geometry, base material, application method, and service environment. This tool does not constitute a formal engineering specification. Always consult the governing standard and your SBS sales or engineering representative before finalizing a finish requirement for a safety-critical or regulated application.


Finishes and Coatings

Finishes and coatings play a critical role in the performance, longevity, and environmental compliance of fasteners. At SBS, we offer a variety of advanced coatings specifically engineered to meet the technical demands of industries such as automotive, aerospace, and heavy machinery, while adhering to increasingly stringent environmental and safety regulations. One of the most widely used finishes is zinc plating, including variations like zinc-nickel and zinc-aluminum, which offer enhanced corrosion resistance, particularly in harsh environments. Zinc-nickel, in particular, provides superior protection against salt spray, making it ideal for marine and automotive applications.

For applications requiring compliance with modern environmental standards, SBS offers coatings such as Geomet. Inorganic, corrosion-resistant coatings are free of heavy metals like cadmium, making them not only environmentally friendly but also safer for workers during application and disposal. Additionally, SBS now provides the option for trivalent chrome finishes, an alternative to hexavalent chrome, which is regulated due to its toxicity. Trivalent chrome offers similar corrosion resistance while meeting new environmental mandates. Another advanced option is the organic-based E-Coat (Electrophoretic Deposition), which is environmentally friendly, offers superior chemical resistance, and provides an even coating thickness, ensuring consistent performance across complex geometries.

SBS also integrates passivation treatments for stainless steel fasteners, which enhances their corrosion resistance and meets ISO 9001 and IATF 16949 standards. These processes ensure that fasteners not only comply with rigorous safety and environmental regulations but also deliver optimal mechanical performance in challenging environments. For a comprehensive overview of common finish options, including applicable standards, compliance, and SST performance, please review the PDF to the right. With detailed product descriptions and specifications available in the SBS E-Catalog, our customers can confidently select the right coatings that ensure both regulatory compliance and superior performance for their specific needs.