{"id":7493,"date":"2022-06-09T07:54:03","date_gmt":"2022-06-08T23:54:03","guid":{"rendered":"https:\/\/xzfastener.com\/?p=7493"},"modified":"2026-06-24T07:55:40","modified_gmt":"2026-06-23T23:55:40","slug":"how-to-read-threaded-rod-specifications-before-sending-an-rfq","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/es\/how-to-read-threaded-rod-specifications-before-sending-an-rfq\/","title":{"rendered":"How to Read Threaded Rod Specifications Before Sending an RFQ"},"content":{"rendered":"

Threaded rod looks simple, but RFQs for this product often go wrong because key details are missing. A buyer may write \u201cM12 threaded rod, zinc plated\u201d and expect an accurate quote. In reality, the supplier still needs to confirm length, pitch, material grade, coating, tolerance, quantity, and packing.<\/p>\n\n\n\n

Before sending an RFQ, it is worth reading the specification carefully. This avoids wrong pricing, incorrect stock checks, and delays during production.<\/p>\n\n\n\n

For common threaded rod supply, buyers can review XZ Fastener\u2019s threaded rod<\/a> and standard fasteners<\/a> pages.<\/p>\n\n\n\n

1. Start With Diameter and Thread System<\/h2>\n\n\n\n

Metric and inch threads are not interchangeable<\/h3>\n\n\n\n

The first detail is the thread system. Metric threaded rods are marked by diameter and pitch, such as M10 \u00d7 1.5. Inch rods are usually described by diameter and threads per inch, such as 1\/2″-13 UNC.<\/p>\n\n\n\n

Especificaci\u00f3n<\/th>Meaning<\/th><\/tr><\/thead>
M12 \u00d7 1.75<\/td>Metric thread, 12 mm diameter, 1.75 mm pitch<\/td><\/tr>
M12 \u00d7 1.25<\/td>Metric fine thread<\/td><\/tr>
1\/2″-13 UNC<\/td>Inch coarse thread<\/td><\/tr>
1\/2″-20 UNF<\/td>Inch fine thread<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

If pitch is not specified, the supplier may assume standard coarse thread. That assumption can be risky when matching nuts or tapped holes.<\/p>\n\n\n\n

2. Confirm the Length<\/h2>\n\n\n\n

Standard length and cut length are different<\/h3>\n\n\n\n

Threaded rods are often supplied in 1 m, 2 m, or 3 m lengths. Some projects require cut-to-length rods.<\/p>\n\n\n\n

Length Type<\/th>Typical Use<\/th><\/tr><\/thead>
1,000 mm<\/td>General stock and construction<\/td><\/tr>
2,000 mm \/ 3,000 mm<\/td>Distributor inventory<\/td><\/tr>
Cut length<\/td>OEM and project installation<\/td><\/tr>
Custom length<\/td>Anchoring or equipment assembly<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

For cut rods, specify whether chamfered ends are required. This small detail affects installation speed and nut engagement.<\/p>\n\n\n\n

3. Check Material and Strength Grade<\/h2>\n\n\n\n

Strength must match the application<\/h3>\n\n\n\n

Material is not only about cost. It affects load capacity, corrosion behavior, and compliance.<\/p>\n\n\n\n

Material \/ Grade<\/th>Common Use<\/th><\/tr><\/thead>
Carbon steel Class 4.8<\/td>General light-duty fastening<\/td><\/tr>
Carbon steel Class 8.8<\/td>Higher-strength applications<\/td><\/tr>
Stainless steel A2-70<\/td>General corrosion resistance<\/td><\/tr>
Stainless steel A4-70 \/ A4-80<\/td>Marine or chemical environments<\/td><\/tr>
ASTM A193 B7<\/td>High-temperature and pressure systems<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

For material references, see XZ Fastener\u2019s carbon steel fasteners<\/a> and stainless steel fasteners<\/a> pages.<\/p>\n\n\n\n

4. Read the Surface Finish Requirement<\/h2>\n\n\n\n

Coating affects corrosion and thread fit<\/h3>\n\n\n\n

Surface finish should be clearly stated in the RFQ.<\/p>\n\n\n\n

Finish<\/th>Typical Purpose<\/th><\/tr><\/thead>
Plain<\/td>Indoor or secondary processing<\/td><\/tr>
Zinc plated<\/td>Basic corrosion protection<\/td><\/tr>
Hot-dip galvanized<\/td>Outdoor construction<\/td><\/tr>
\u00d3xido negro<\/td>Indoor machinery<\/td><\/tr>
PTFE coating<\/td>Low friction or special environments<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

For coated threaded products, buyers can review XZ Fastener\u2019s various coated fasteners<\/a> and hot-dip galvanizing<\/a> pages.<\/p>\n\n\n\n

5. Do Not Ignore Tolerance and Fit<\/h2>\n\n\n\n

Coated rods may need extra clearance<\/h3>\n\n\n\n

Threaded rod must fit nuts smoothly. If coating thickness is high, especially with hot-dip galvanizing, thread fit must be checked.<\/p>\n\n\n\n

Issue<\/th>Possible Result<\/th><\/tr><\/thead>
Wrong pitch<\/td>Nut cannot assemble<\/td><\/tr>
Excess coating<\/td>Tight thread fit<\/td><\/tr>
Poor straightness<\/td>Installation difficulty<\/td><\/tr>
Rough thread<\/td>Slow assembly or thread damage<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

For critical orders, ask for nut-fit testing before shipment.<\/p>\n\n\n\n

6. RFQ Checklist for Threaded Rod<\/h2>\n\n\n\n

Send complete details from the beginning<\/h3>\n\n\n\n

A clear RFQ should include:<\/p>\n\n\n\n