Nuts
Ningbo Teng Qi Fasteners Co.,Ltd is a professional manufacturer and supplier of stainless steel and industrial nuts, specializing in the production of standard and custom nuts for global customers. With ISO9001 certified quality management and advanced manufacturing capabilities, we produce high-quality nuts according to international standards including DIN, ISO and ASME/ANSI specifications. Our products are widely used in machinery, automotive, construction, industrial equipment and other fastening applications. Our product range includes hex nuts, heavy hex nuts, structural nuts, castle nuts, flange nuts, nylon lock nuts, square nuts, T slot nuts, dome nuts, coupling nuts, wing nuts, weld nuts and other special customized nuts. We manufacture nuts from various materials including stainless steel 304, stainless steel 316, carbon steel, brass and aluminum through advanced cold heading, tapping and hot forging processes.
From raw material inspection to nut forming, threading, heat treatment and surface treatment, every production stage is strictly controlled to ensure stable quality and reliable performance. Equipped with cold heading machines, tapping machines and hot forging equipment, we are capable of producing nuts with accurate dimensions, precise threads and consistent mechanical properties. We also provide various surface treatments to meet different application requirements and deliver reliable fastening solutions to customers worldwide.
Nuts Manufacturing Equipment:
Quality Control of Nuts:
With professional inspection equipment and experienced quality control personnel, we perform comprehensive inspections on critical parameters such as material grade, dimensional accuracy, thread performance, mechanical strength and surface quality. Whether producing standard DIN, ISO, ASME/ANSI nuts or customized nuts according to drawings and samples, we are committed to providing reliable and consistent fastening solutions for customers worldwide.
| Inspection Item | QUality Control Method |
|---|---|
| Raw Material Inspection | Verify material grade, chemical composition and mechanical properties to ensure material consistency |
| Dimensional Inspection | Check nut width across flats, height, diameter and other critical dimensions according to drawings and standards |
| Thread Inspection | Use thread plug gauges and other inspection tools to verify internal thread size, pitch and fitting accuracy |
| Mechanical Testing | Perform hardness testing, Proof load performance checks when required |
| Heat Treatment Inspection | Verify hardness and mechanical properties after heat treatment processes |
| Surface Treatment Inspectio | Check coating thickness, surface appearance and corrosion resistance requirements |
Standard of Screws we produce
ASME/ANSI American Standard:
A194 Grade 2HM Heavy Hex Nuts A194 Grade 7M Heavy Hex Nuts A563 Heavy Hex Nuts A194 Grade 2H Heavy Hex Nuts A194 Grade 7 Heavy Hex Nuts
ANSI/ASME B18.2.2 Hex Nuts ASME B 18.16.6 Nylon Nuts ASME/ANSI B 18.2.2 Hex Thick Nuts ASME/ANSI B 18.2.2 Slotted Nuts ASME/ANSI B18.2.2 Hex Flange Nuts
DIN Germany Standard:
DIN985 Nylon Nuts DIN934 Hex Nut Stainless Steel DIN466 Knurled Nuts DIN6923 Hex Flange Nut DIN508 Nuts for T-slots DIN439 Chamfered Stainless Steel DIN7967 Self-Locking Counter Nuts DIN1587 Hex Domed Cap Nuts Acorn Nut DIN6330 1.5d Hex Thick Nuts DIN6334 Hex Coupling Nuts DIN6915 Steel Structural Hex Nuts DIN982 Nylon Nuts DIN981 Locknuts DIN986 Hex Domed Cap Nuts DIN980V Three-Point Locking Hexagon Nuts DIN928 Square Weld Nuts DIN935 Hexagon Slotted and Castle Nuts
EN Europe Standard:
EN14399-3 High-strength Structural Hex Nut Stainless Steel Single Leaf Spring T-Slot Sliding Nut Stainless Steel Roll-in T Slot Nut for 20 Series
GOST Russia Standard:
GOST 28919 Hex Nuts GOST 5915 Hex Nut GOST R 52645 Structural Hex Nuts
UNI Italt Standard:
UNI5587 Thick Hex Nuts UNI5588 Hex Nuts UNI5713 High-Strength Large Hexagon Nuts
AS Australian Standard:
AS1112.1 Hex Nuts AS/NZS 2451 Double Chamfer Hex nuts AS/NZS 2465 Australian Standard Hexagon Nuts AS1252 High Strength Hex Nuts