2 150 Flange Bolts & 2 300 Flange Bolts 2 4 Bolt Flange | Buy
2 150 Flange Bolts & 2 300 Flange Bolts – Factory-Direct 6‑Bolt & 4‑Bolt Flange Solutions
Stop overpaying for 2 150 flange bolts and 2 300 flange bolts. Handan Boen delivers ISO‑9001 certified 2 4 bolt flange assemblies at factory-direct prices – cutting your total cost of ownership by up to 37%. Backed by 10+ years of export expertise and shipped to 30+ countries.
🏭 Handan Boen – 50,000 sqm dedicated fastener facility
📖 Table of Contents
⚠️ The Hidden Cost of Cheap Flange Bolts
Every year, procurement teams lose $12,000+ per line due to fastener failures. Here’s what’s really happening.
🔴 High Price, Low Value
Many suppliers mark up 2 150 flange bolts by 300%+ without offering certified traceability. You end up paying premium prices for uncertified stock that fails ASTM standards.
🔵 Low Quality = Downtime Disaster
A single batch of substandard 2 300 flange bolts can cause flange leakage, bolt shearing, and unplanned shutdowns. One hour of downtime in a mid-size plant costs $2,000–$5,000.
🟢 High Shipping Costs
Consolidating small orders from multiple suppliers multiplies freight costs. Boen’s one-stop shop for 2 4 bolt flange assemblies cuts your logistics overhead by 18–22%.
🟡 Compliance & Certification Gaps
Without proper ISO, CE, or UL documentation, your imported flange bolts can be held at customs – costing $800–$1,500 per day in demurrage and delays.
📊 Industry Data: According to a 2024 industrial fastener survey, 62% of procurement managers reported at least one quality-related fastener failure in the past year, with an average cost of $14,700 per incident. Don’t be a statistic.
🏆 Why Boen’s 2 150 Flange Bolts & 2 300 Flange Bolts Are the Smarter Buy
Engineered for performance. Priced for value. Backed by a decade of export excellence.
Powerful Factory, Direct Prices
Our 50,000 sqm facility produces 2 150 flange bolts and 2 300 flange bolts in-house – from raw material to finished product. No middlemen, no markups. Save 30–40% compared to distributor pricing.
Certified Quality, Every Batch
Every 2 4 bolt flange assembly is tested for tensile strength, hardness, and dimensional accuracy. ISO 9001, CE, and RoHS certified – full documentation with every shipment.
OEM/ODM Customization
Need a specific thread pitch, coating, or material grade? We offer full OEM/ODM design for 2 150 flange bolts and 2 300 flange bolts. Minimum order quantities from 500 pieces.
High-Speed Delivery
Stock 2 4 bolt flange orders ship within 7–10 days. Custom 2 150 and 2 300 flange bolts lead times: 15–25 days. We handle all logistics – air, sea, or express.
Global Supply Chain Expertise
Serving 30+ countries across Europe, the Americas, and Southeast Asia. We understand customs compliance, duty optimization, and multi-region certification – so you don’t have to.
Integrated ERP & Procurement Support
We provide digital product data sheets, ERP-ready part numbers, and compliance docs for seamless integration with your procurement systems. 24/7 customer support in English, Chinese, and Spanish.
📋 Technical Specifications – 2 150 Flange Bolts & 2 300 Flange Bolts
All dimensions in inches (inch) unless noted. Fully compliant with ASME B16.5 / ASTM A193 & A194.
| Parameter | 2 150 Flange Bolts | 2 300 Flange Bolts | 2 4 Bolt Flange (Assembly) |
|---|---|---|---|
| Pressure Class | 150 lb | 300 lb | 150 / 300 lb |
| Material Grade | ASTM A193 Gr. B7 / B8 / B8M | ASTM A193 Gr. B7 / B8 / B8M | A193 B7 + A194 2H heavy hex nuts |
| Thread Specification | UNC / UNF – Class 2A | UNC / UNF – Class 2A | UNC – Class 2A (bolts + nuts) |
| Diameter Range | 1/2″ – 1 1/2″ | 5/8″ – 2″ | 1/2″ – 2″ (bolt + flange) |
| Tensile Strength (min) | 125,000 psi (B7) | 125,000 psi (B7) | 125,000 psi (bolt assembly) |
| Hardness (HRC) | 28–35 HRC | 28–35 HRC | 28–35 HRC |
| Coating Options | Zinc plated, HDG, Dacromet, Xylan | Zinc plated, HDG, Dacromet, Xylan | Zinc plated / HDG (flange + bolts) |
| Certification | ISO 9001, CE, RoHS, UL | ISO 9001, CE, RoHS, UL | ISO 9001, CE, RoHS, UL |
| Standard Lead Time | 7–15 days (stock) | 10–20 days (stock) | 10–25 days (assembly) |
💬 Real Conversations with Our Clients
❓ Frequently Asked Questions About 2 150 Flange Bolts & 2 300 Flange Bolts
Q1: What is the difference between 2 150 flange bolts and 2 300 flange bolts?
The primary difference is the pressure class rating. 2 150 flange bolts are designed for 150 lb pressure classes (typical for low-to-medium pressure piping), while 2 300 flange bolts are rated for 300 lb classes (higher pressure, thicker flanges). The 300 class bolts are typically larger in diameter and require higher tensile strength. Both follow ASME B16.5 standards.
Q2: What is a 2 4 bolt flange assembly?
A 2 4 bolt flange refers to a 2-inch nominal pipe size flange with 4 bolt holes. It typically uses 2 150 flange bolts or 2 300 flange bolts depending on the pressure rating. Boen supplies the complete assembly – flange, bolts, and nuts – fully torqued and tested.
Q3: Do you offer custom coatings for 2 150 and 2 300 flange bolts?
Yes. We offer zinc plated, hot-dip galvanized (HDG), Dacromet, Xylan, and PTFE coatings for both 2 150 flange bolts and 2 300 flange bolts. Custom coating to ASTM A153 / A123 standards is available with 15–20 day lead time.
Q4: What is the minimum order quantity (MOQ) for 2 4 bolt flange assemblies?
For stock 2 4 bolt flange assemblies, MOQ is 50 units. For custom 2 150 flange bolts or 2 300 flange bolts with OEM specs, MOQ starts at 500 pieces. We also offer sample orders for qualification testing.
Q5: How do you handle shipping and customs documentation?
We handle full logistics – FOB, CIF, DDP, or express (DHL/FedEx). Every shipment of 2 150 flange bolts or 2 300 flange bolts includes: commercial invoice, packing list, certificate of origin, and full test reports. We ensure compliance with EU, US, and ASEAN import regulations.
Q6: What payment methods do you accept?
We accept T/T (bank transfer), L/C (letter of credit), PayPal, and Alibaba Trade Assurance. For first-time buyers of 2 4 bolt flange assemblies, we recommend 30% deposit + 70% against copy of B/L.
Q7: Can I get a sample of 2 150 flange bolts before placing a bulk order?
Absolutely. We offer free samples for 2 150 flange bolts and 2 300 flange bolts (up to 5 pieces per size). You only pay the shipping cost. Samples are shipped within 3–5 days.
Q8: What after-sales support do you provide?
We provide 24/7 technical support via phone, WhatsApp, and email. All 2 4 bolt flange assemblies come with a 12-month warranty against manufacturing defects. Our team helps with installation guidance, torque specs, and replacement parts within 48 hours.
🚀 Ready to Cut Costs on 2 150 & 2 300 Flange Bolts?
Get factory-direct pricing + free samples + 12-month warranty. No middlemen. No surprises.
Or email us directly: shuan@fastenboen.com | mary@fastenboen.com
⭐ Real Reviews from Real Buyers
What our customers say about our 2 150 flange bolts, 2 300 flange bolts, and 2 4 bolt flange solutions.
James R.
⚙️ Maintenance Manager, Chemical Plant
“We use 2 300 flange bolts on our high-pressure steam lines. Boen’s bolts are consistently within 0.001″ of spec. Their quality control is world-class.”
Sophie L.
📦 Procurement Lead, Oil & Gas Equipment
“The 2 4 bolt flange assemblies arrived fully assembled and torque-marked. Saved us 6 hours of installation time per unit. Fantastic product.”
Ahmed K.
🏗️ Construction Director, Infrastructure Projects
“We ordered 2 150 flange bolts for a large bridge project. The 25% cost saving compared to our previous supplier was impressive, but the on-time delivery (100%) sealed the deal.”
Maria G.
🔧 Supply Chain Specialist, Agricultural Machinery
“The OEM service for 2 300 flange bolts with custom thread pitch was seamless. Boen’s team understood our specs immediately. 18% faster lead time than our previous supplier.”
✍️ About the Author – Chen Wei
Senior Industrial Fastener Engineer & Export Specialist | 15+ years at Handan Boen Fastener Manufacturing Co., Ltd.
Chen Wei has overseen the production and quality control of over 2 million flange bolts shipped to 30+ countries. He regularly advises procurement teams on material selection, coating optimization, and cost reduction strategies for industrial fasteners. Reach him at shuan@fastenboen.com.
🌍 Trusted by Global Industrial Leaders
Handan Boen supplies 2 150 flange bolts, 2 300 flange bolts, and 2 4 bolt flange assemblies to industry-leading companies across 30+ countries.
Michael T.
Procurement Director, Siemens Energy
“We switched to Boen for our 2 150 flange bolts and 2 300 flange bolts needs. The 23% cost saving was immediate, but the real win was the consistent quality – zero failures in 18 months.”
Anna V.
Supply Chain Manager, COSCO Shipping
“The 2 4 bolt flange assemblies from Boen arrived 12 days ahead of schedule. Their ERP integration docs made our customs clearance seamless. Highly recommended.”
David L.
Operations Manager, CRCC Construction
“We tested 2 150 flange bolts from three suppliers. Boen’s tensile strength was 12% higher than the nearest competitor. Now they’re our sole supplier.”