2. High quality with competitive price for sale.
3. Delivery: within 7-15 days or according to quantity
4. Approved by ISO9001, SGS every year
5. Flexible MOQ – 100 pcs trial, volume discounts for bulk.
→Product Introduction
A bolt is a type of threaded fastener with external threads, typically consisting of a head and a threaded shank.
It is designed to be used in conjunction with a nut to securely fasten two components that have aligned through-holes.
Since the nut can be easily removed without damaging the parts, this type of connection is considered detachable or non-permanent.
Available Sizes & Dimensions
Mechanical Properties
Thread Specifications
FAQ
Q1: What are the main products you can supply?
A: We are a professional manufacturer and supplier in China for steel pipe and pipe fittings, including flanges, elbows, bolts, nuts, and other threaded fasteners. Our product range covers both standard and custom solutions for industrial piping and structural applications.
Q2: What is your minimum order quantity (MOQ)?
A: For trial orders, our MOQ is 100 pcs per size. For bulk orders, MOQ is flexible — please contact us with your target quantity for a competitive quote. Volume discounts are available for large orders.
Q3: How long is the delivery time?
A: 7-15 days for standard sizes in stock after payment confirmation. For custom orders, delivery time is typically 20-30 days, depending on quantity, specifications, and surface treatment requirements. We will confirm the exact timeline upon order confirmation.
Q4: How do you control quality?
A: We implement strict 3-stage quality control:
Raw material – chemical composition verified by spectrometer per grade requirements
Production – dimensional checks during heading, threading, and heat treatment
Final – 100% thread gauging (Go/No-Go), hardness testing, tensile testing, and proof load testing per ISO 898-1
A Mill Test Certificate (EN 10204 Type 3.1) is provided with every shipment, including chemical analysis and mechanical test results.
Q5: Can I get samples before ordering?
A: Yes. Stock samples are free of charge – you only pay the shipping cost. Custom samples require a small production fee, which will be deducted from your first bulk order.
Q6: Do you accept OEM or custom orders?
A: Yes, we accept custom orders based on your drawings, specifications, or samples. We can also print your logo on the bolt head and packaging. Our engineering team will review your requirements and provide a solution within 24 hours.
Q7: Which standards do your products comply with?
A: Our carbon steel bolts are manufactured per:
ISO 898-1 – Mechanical properties for carbon steel bolts
ISO 4014 / ISO 4017 – Dimensions for hex head bolts (metric)
DIN 931 / DIN 933 – Dimensions for hex head bolts (metric)
ASME B18.2.1 – Dimensions for hex bolts (inch)
ASTM A325 / A490 – High-strength bolts (US market)
GB/T 3098.1 – Mechanical properties (Chinese standard)
Our factory is ISO 9001:2015 certified and SGS audited annually.
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