Cold heading Service

AS1252 High Strength Steel Hex Nuts Manufacturer In China

Ningbo Teng Qi Fasteners Co., Ltd is a leading AS1252 hex nuts manufacturer in China. AS1252 heavy hex nuts are designed to be used with AS1252 bolts of corresponding strength grades. These nuts have a larger and thicker profile compared to regular hex nuts, providing better load distribution and improved resistance to loosening in high-stress applications. They are commonly used in construction, mining, and industrial settings where strong and reliable fastening is required.

AS1252 Heavy Hex Nuts Manufacturer

Specification of AS1252 Hex Nuts:

Product nameAS1252 HEX NUT
ThreadMetric Thread
Manufacturing Processwire drawing, cold heading/hot forging, thread rolling, heat treatment, surface treatment
Surface treatmentplain or hdg
Application IndustryConstruction/Machinery/Automotive/Infrastructure/Electrical and Electronics/Furniture/Marine and Offshore

 Mechanical properties of AS1252 Nuts:


Class 8 AS1252 Hex Nuts Hardness
M5 ≤ D ≤ M16200-302 HV
M16 < D ≤ M39233-353 HV
M5 ≤ D ≤ M16190-287 HB
M16 < D ≤ M39221-336 HB
M5 ≤ D ≤ M1630(max) HRC
M16 < D ≤ M3936(max) HRC

Chemical Composition:

Material and heat treatmentChemical
composition limits
(cast analysis, %) a
C (max)Mn (min)P (max)S (max)
8 Regular nut (style 1) D ≤ M16Carbon steel0.580.250.060.15
8 Regular nut (style 1) D > M16Carbon steel (quenched and tempered)0.580.300.0480.058

Click to check detailed information of AS1252 hex nuts:

AS1252 hex nut dimension chart

Surface treatment:

Surface finish Unless otherwise specified, high-strength steel bolts shall be supplied, hot-dip galvanized in accordance with AS 1214. Uncoated bolts shall be in the dull black as heat-treated condition.

Manufacturing Quality Control of AS1252 Hex Nuts:

In a world where connections matter, Ningbo Teng Qi Fasteners is more than just a fasteners supplier and manufacturer. We are architects of stability, builders of relationships, and champions of your success. From skyscrapers that reach for the sky to machines that power industries, our fasteners form the backbone of progress. When you choose Ningbo Teng Qi Fasteners, you choose unwavering quality, exceptional service, and a partner who understands that every bolt holds a piece of your vision.

Control MethodDetail
Material Inspection:Verify the material's composition, heat treatment, and quality upon receipt. Conduct metallurgical analysis to ensure the material properties meet the standards.
Process Control:Implement strict process control measures for heat treatment, machining, threading, and any other manufacturing steps. Maintain consistent process parameters to ensure uniform quality.
Inspection Points:Introduce inspection points at various stages of manufacturing to check for defects, dimensions, and quality. Inspect threading, dimensions, surface finish, and other critical parameters.
Sampling and Testing:Regularly sample products for testing, such as tensile testing, hardness testing, and metallurgical analysis, to ensure they meet the required specifications.
Thread Inspection:Thoroughly inspect threading using proper thread gauges to ensure accurate dimensions and fit with mating components.
Traceability:Implement a traceability system to track each fasteners journey from raw material to final product. This aids in accountability and recalls if necessary.