ASME Bolt Kits

ASME Standard High Temp/Pressure Bolt Kits — Complete Flange Bolting Sets | Custom

ASME standard high-temperature and high-pressure bolt kits provide complete, pre-measured flange bolting sets for ASME B16.5 standard flanges. Each kit includes the correct quantity of stud bolts, nuts, and washers cut to the precise length for the specified flange size and pressure class. Eliminates guesswork and ensures code-compliant flange assembly.

Material & Specifications

Size Range	M12 to M72 / 1/2″ to 4″ stud bolts
Standard	ASME B16.5, ASME B16.47, API 6A flange dimensions
Material	B7/2H (standard), B8/8 (SS304), B8M/8M (SS316), B16/4 (high temp)
Surface / Coating	Plain/Black, Hot-Dip Galvanized, Dacromet, PTFE/Xylan
Kit Contents	Stud bolts, heavy hex nuts, flat washers (as required per flange)
Pressure Class	Class 150, 300, 600, 900, 1500, 2500

Surface Treatment & Zinc Coating Quality

At BoltNutsPlus, we understand that surface treatment is critical to fastener longevity and performance. Our products undergo rigorous coating processes to ensure maximum corrosion resistance and durability. We offer five premium coating options, each tested to international standards:

• Hot-Dip Galvanizing (HDG) — Thick zinc layer (50-120μm) providing superior long-term corrosion protection for outdoor, marine, and industrial environments. Compliant with ISO 1461 / ASTM A153 standards. Salt spray resistance: 500-1,000+ hours. Ideal for structural steel assemblies exposed to harsh weather.
• Electroplated Zinc Blue-White (Zn Blue/White) — Bright, clean silver-blue appearance with 5-15μm zinc layer. Cr3+ passivation technology, fully RoHS compliant. Ideal for indoor machinery, electronics, and general-purpose applications requiring aesthetic appeal and moderate corrosion resistance.
• Color Zinc / Yellow Zinc (Iridescent Passivation) — Multi-colored iridescent passivation film offering enhanced corrosion resistance (100-200 hours salt spray) with a distinctive golden finish. Widely preferred in automotive, agricultural equipment, and construction machinery sectors for its balanced protection and visual appeal.
• Dacromet Coating — Advanced water-based zinc-chromium coating technology with NO hydrogen embrittlement risk. Provides 1,000+ hours salt spray resistance, making it the preferred choice for high-strength fasteners in extreme environments. Environmentally friendly (no heavy metal discharge), RoHS/ELV compliant, ideal for automotive and wind energy applications.
• Multi-Element Alloy Co-Permeation — Zinc-aluminum-rare earth alloy layer offering 2-3x the corrosion resistance of traditional galvanizing. Features self-healing properties at scratch points, ensuring long-term protection even in damaged areas. Ideal for critical infrastructure, power transmission towers, coastal projects, and marine installations.

Key Features

• Pre-measured, complete bolt kits eliminate sourcing and cutting errors
• Correct stud lengths per ASME B16.5 for each flange size and pressure class
• Multiple material grades available for different temperature/corrosion services
• Each kit labeled with flange size, pressure class, and material grade
• Full material certification for all kit components (studs, nuts, washers)
• Custom packaging with private label options for OEM and distributor clients

Applications

• ASME B16.5 flange assembly in oil & gas, petrochemical, and power plants
• Turnaround/shutdown maintenance pre-measured bolt kits
• New construction flange assembly packages
• Valve and equipment manufacturer OEM bolt packages
• Offshore platform flange maintenance kits
• Any application requiring complete, code-compliant flange bolting

Why Choose BoltNutsPlus?

• ISO 9001:2015 Certified Manufacturing — consistent quality you can trust on every batch
• 15+ Years of Export Experience — serving 40+ countries across 6 continents
• Full Traceability — material certificates (EN 10204 3.1) and comprehensive test reports included
• Custom Packaging & OEM/ODM — your brand identity, your specifications, our precision manufacturing
• Third-Party SGS / Bureau Veritas Inspection Available upon request
• 24-Hour Quote Response — same-day reply for urgent requirements; standard 24-hour turnaround