Dongguan Situo Hardware Products Technology Co., Ltd

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1.0 - 30.0MM Stainless Steel Round Nuts Chemical Instrument Locking Screws

China 1.0 - 30.0MM Stainless Steel Round Nuts Chemical Instrument Locking Screws

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1.0 - 30.0MM Stainless Steel Round Nuts Chemical Instrument Locking Screws

MOQ： 1PCS
Price： 5-10 USD per item
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Category	nut
sizerange	1.0-30.0MM
Corrosionresistance	High
Precision	Min0.001
head shape	Customized
Application	Chemical processing equipment
Weight	Varies by size
Productname	Chemical Hardware
Material	stainless steel
Sample period	10 to 15 days
origin	china
Manufacturer	SITUO
Material grade	SUS303
Surface treatment	Customized
packing	carton
Payment Terms	T/T
Supply Ability	10000PCS per day
Delivery Time	Communication
Packaging Details	Communication
Surfacetreatment	Passivated
Brand Name	SITUO
Model Number	ST-130003
Certification	ISO9001 & TS16949
Place of Origin	GuangDong Dongguan

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Product Details
Company Details

Product Specification


Category	nut	sizerange	1.0-30.0MM
Corrosionresistance	High	Precision	Min0.001
head shape	Customized	Application	Chemical processing equipment
Weight	Varies by size	Productname	Chemical Hardware
Material	stainless steel	Sample period	10 to 15 days
origin	china	Manufacturer	SITUO
Material grade	SUS303	Surface treatment	Customized
packing	carton	Payment Terms	T/T
Supply Ability	10000PCS per day	Delivery Time	Communication
Packaging Details	Communication	Surfacetreatment	Passivated
Brand Name	SITUO	Model Number	ST-130003
Certification	ISO9001 & TS16949	Place of Origin	GuangDong Dongguan
High Light	1mm Stainless steel round nuts ，30.0MM Stainless steel round nuts ，locking screws 30.0MM

1.0 - 30.0MM Stainless Steel Round Nuts Chemical Instrument Locking Screws

Stainless steel round nuts, chemical instrument locking screws, precision hardware accessories

Sto can adjust the production process according to the product quantity to achieve the optimal cost-performance ratio.

Stainless steel through-hole adjusting nuts are key fasteners suitable for corrosive media, high temperature, pressure fluctuation and frequent adjustment conditions in the chemical industry. Their core values are excellent corrosion resistance, precise adjustment, reliable anti-loosening and easy maintenance.

Sto can achieve the optimal balance between quality and cost through flexible switching between cold heading & machining, graded material selection and parallel process optimization based on order volume.

Core Application Scenarios in Chemical Equipment

Pressure Vessels & Reactors

Shell and head connection: Used for fastening and clearance adjustment of pressure vessels, reactors, heat exchangers and storage tanks. Through holes facilitate bolt penetration and alignment.
Flange assembly: Positioning and pre-tightening of pipe flanges, equipment flanges and manhole covers, ensuring sealing performance under pressure and temperature changes.
Internal component fixing: Adjustment and installation of trays, baffles, supports and catalyst holders inside reactors and towers.

Piping & Valve Systems

Pipeline supports and hangers: Adjustment and fixation of chemical pipelines, ensuring stability under thermal expansion and vibration.
Valve actuators: Installation and position adjustment of ball valves, gate valves, check valves and control valves.
Pump and compressor bases: Leveling, alignment and anti-vibration fastening for chemical pumps, compressors and mixing equipment.

Filtration, Separation & Drying Equipment

Filter housings and centrifuge components: Adjustment and sealing for pressure-resistant structures.
Dryer and crystallizer parts: Fastening with high corrosion resistance and thermal stability.

Environmental & Waste Treatment Equipment

Waste gas scrubbers, absorption towers and wastewater treatment devices: Suitable for strong acid, alkali and salt corrosion environments.
Skid-mounted chemical units: Module connection, leveling and structural adjustment.

Core Product Characteristics

Material and Corrosion Resistance

Main materials: SUS316 / 316L (priority), SUS304; duplex stainless steel (S32760, etc.) for strong acid, alkali and chloride environments.
Corrosion resistance: 316 with molybdenum provides excellent resistance to pitting, crevice and stress corrosion. Salt spray test ≥ 1200 hours.
Surface treatment: Pickling passivation, electrolytic polishing to form a dense passive film for enhanced corrosion resistance.

Structural and Functional Features

Through-hole design: Full through or stepped holes for easy bolt insertion, shaft penetration and alignment.
Adjustment function: Cooperate with screws or bolts to achieve axial / radial fine adjustment, compensating for installation tolerance, thermal expansion and deformation.
Reliable anti-loosening: Used with lock washers, thread locking compound or double nuts to resist vibration and pressure pulsation.
Precision matching: Thread accuracy 6H, through holes per GB/T5276 / GB/T5277, balancing assembly convenience and connection stability.

Mechanical and Environmental Adaptability

Strength grade: A4-70 / A4-80, tensile strength ≥ 700MPa, meeting pressure and load requirements of chemical equipment.
Temperature range: -60℃ ~ 300℃, suitable for high-temperature reaction systems and low-temperature working conditions.
Maintenance-friendly: Not easy to rust or scale, reducing replacement and maintenance costs in the whole life cycle.

Sto Flexible Production Process

Process Route Selection

Large batch (≥100,000 pcs): Multi-station cold heading + tapping + through-hole drilling

Advantages: high efficiency, material utilization ≥ 85%, low cost, stable consistency. Application: standard sizes M6~M36 for general chemical equipment.

Medium & small batch (10,000~100,000 pcs): Bar / tube CNC turning + drilling + tapping

Advantages: fast model change, low mold cost, suitable for non-standard structures.

Small batch / customization (<10,000 pcs): CNC precision machining + custom through holes / threads

Advantages: high flexibility, meeting special dimensions, materials and surface treatment requirements.

Key Process Optimization

Graded material selection: Select 304 / 316 / duplex steel according to corrosion level, avoid over-design; match strength grade based on working load.
Process integration: Integrated cold heading + drilling + tapping; automatic turning to reduce clamping and handling.
Intelligent inspection: CCD vision, thread measurement, salt spray test to meet chemical equipment standards.
Surface treatment coordination: Unified passivation / electrolytic polishing for mass production; customized treatment for special orders.

Cost-Performance Improvement Path

Scale effect: Large-batch cold heading reduces unit cost by 30%~50%.
Material utilization: Cold heading reduces material loss by more than 50% compared with machining.
Delivery guarantee: Flexible process supports urgent orders and long-term projects.
Stable quality: Automated production + full inspection reduce after-sales and rework costs.

We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.

Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001. We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.

Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment.

Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.

Our customers include bo-sch, Foxconn, Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.

Our Capacity

Main product names:	Stainless steel screws, carbon steel screws, pins, rivets, nuts, eccentric nails, embedded parts, and other fasteners.
Business Type	Factory / Manufacturer
Service	CNC Machining, Turning and Milling, CNC Turning, Cold heading, stamping, Assembly Service
Material	1). Aluminum: AL 6061-T6, 6063, 7075-T etc 2). Stainless steel: 303,304,304L,316L,316F,630,410,420,430, etc 3). Steel: 4140, Q235, Q345B,20#,45# 1215,12L14 ,1144,1006,1008,1010,1015,1018 ,10B21,1035,1065 etc. 4). Alloy steel: 5140,4135,4140,3435,5120,415 ,435,440 etc 5). Titanium: TA1,TA2/GR2, TA4/GR5, TC4, TC18 etc 6). Brass: C36000 (HPb62), C37700 (HPb59), C26800 (H68), C22000(H90),C27000,C51900,C11000,C3604,H62,H65 etc 7). Copper, bronze, Magnesium alloy, Delrin, POM, Acrylic, PC, etc.
Finish	Sandblasting, Anodize color, Blackenning, Zinc/Nickl Plating, Polish, Power coating, Passivation PVD, Titanium Plating, Electrogalvanizing, electroplating chromium, electrophoresis, QPQ(Quench-Polish-Quench), Electro Polishing, Chrome Plating, Knurl, Laser etch Logo, etc.
Drawing format	STEP, STP, GIS, CAD, PDF, DWG, DXF etc or samples.
Tolerance	+/-0.01mm ~ +/-0.05mm
Surface roughness	Ra 0.1~3.2
Inspection	Complete inspection lab with Micrometer, Optical Comparator, Caliper Vernier, CMM Depth Caliper Vernier, Universal Protractor, Clock Gauge, Internal Centigrade Gauge

Stainless steel round nuts manufacturing process

Precision hardware components production

Stainless steel fastener quality control

Company Details

Bronze Gleitlager

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from Quality China Factory

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Business Type:

Manufacturer,Seller 
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Year Established:

2019 
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Total Annual:

2800000-3500000
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Employee Number:

50~100 


Ecer Certification：

Verified Supplier 

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Dongguan Situo Hardware Products Technology Co., Ltd
No. 9, Shi bi One Alley, Zhangmutou Town, Dongguan City, Guangdong Province
https://www.cnc-hardwareparts.com/

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