Castle Nut Slotted Hex Nut Durable Fastener for Mechanical Applications

• Customization: Available
• Material: Carbon Steel, Alloy Steel, Stainless Steel
• Type: Hexagon Head
• Model NO.: Castle Nut
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS
• Grade: Gr4.8, 5.8, 6.8,A2-40,A2-70,A4-80,2205,2507,Incolo
• Certificate: ISO9001:2008
• Surface Treatment: Plain, Zinc Plated, Black Oxide, Hot DIP Galv.Et
• MOQ: 1000PCS
• Quality Control: 100% QC Test
• Delivery Time: 10-15 Days
• Transport Package: Small Box +Outer Carton +Pallets
• Specification: M3-M64
• Trademark: JM Hardware ®
• Origin: China
• HS Code: 7318159001
• Production Capacity: 100000PCS/Month
• Package Size: 30.00cm * 20.00cm * 14.00cm
• Package Gross Weight: 36.000kg
• Lead Time: 10 days (1 - 1000 Pieces) ; To be negotiated ( > 1000 Pieces)

Product Description

Specification

Material	1.StainlessSteel:SS201,SS303,SS304,SS316,SS410,SS420 2.Steel:C45(K1045), C46(K1046),C20 3.Carbon Steel: 1010,1035,1045
Grade	SAE J429 Gr.2, 5,8; ASTM A307Gr.A,A193 B7,B8,B8M,A194 2H, Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 and etc.
Finish	Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G and etc.
Connection	Common Nut
Standard	ISO, DIN, ANSI, JIS, BS and Non-standard
Sample Service	Samples are all in free.
Certificate	ISO9001,CE, SGS, BV
Packing	Bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand
Payment terms	FOB, CIF, CFR, L/C, or others.
Delivery method	by sea, by air or by express service
Application	Structural Steel; Metal Buliding; Oil&Gas; Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating and etc.

Product Description

JM Hardware® Castle Nut for Secure Fastening Applications

JM Hardware® manufactures a wide range of nuts designed for industrial fastening applications requiring reliable load distribution and secure locking performance.

JM Hardware® nuts are widely used together with bolts, studs, and threaded rods in steel structures, machinery assembly, infrastructure, pipelines, power facilities, and various industrial installations.

JM Hardware® supplies standard nuts as well as customized solutions based on drawings, standards, materials, and specific application requirements.

Certifications

Certified Manufacturing and Quality Compliance

JM Hardware® operates under internationally recognized quality management systems and relevant fastener standards.

Nuts produced by JM Hardware® are supported by quality management certifications and controlled manufacturing processes to ensure consistent quality and traceability.

Certification documents and inspection records from JM Hardware® can be provided upon request to support customer audits and technical requirements.

Why Choose JM Hardware

Professional Manufacturer for Nut Solution

JM Hardware® provides reliable nut solutions for various industrial and structural applications.

With strong R&D capability and long-term manufacturing experience, JM Hardware® supports different nut types, materials, strength grades, surface treatments, and customized requirements.

JM Hardware® combines rich industry experience, a professional service team, extensive export background, and registered trademarks in major international markets to ensure stable cooperation and dependable quality.

Quality Control

Systematic Quality Control from Material to Finished Nut

At JM Hardware®, quality control is integrated into every stage of the nut manufacturing process.

From raw material inspection to forming, threading, heat treatment, surface treatment, and final inspection, JM Hardware® follows defined procedures to ensure dimensional accuracy and mechanical performance.

This systematic quality control system at JM Hardware® helps ensure consistent nut quality and reliable fastening performance.

Production & Testing Equipment

Complete Production Facilities for Nut Manufacturing

JM Hardware® is equipped with complete production facilities for nut manufacturing, including cold forming, machining, tapping, heat treatment, and surface treatment processes.

The production equipment at JM Hardware® supports both standard nut production and customized orders, allowing flexible production capacity and stable quality output.

Mechanical and Dimensional Performance Verification

JM Hardware® conducts mechanical and dimensional testing on nuts using professional testing equipment.

Testing items may include proof load testing, hardness testing, dimensional inspection, thread accuracy, and surface condition verification according to applicable standards and customer requirements.

Test reports issued by JM Hardware® can be provided when required.

Packaging & Shipping

Secure Packing and Flexible Export Solutions

JM Hardware® packs nuts according to product characteristics and customer requirements to ensure safety during transportation.

Packing solutions provided by JM Hardware® include cartons, wooden cases, pallets, bulk packing, and customized export packaging.

With extensive export experience, JM Hardware® supports different delivery terms and international logistics arrangements.

Trusted by Global Industrial Customers

JM Hardware® regularly participates in international exhibitions and maintains long-term cooperation with customers from different industries and regions.

Through exhibitions, customer visits, and direct communication, JM Hardware® continuously improves its understanding of fastening applications and customer requirements.

Factory visits, audits, and on-site inspections at JM Hardware® are always welcome.

FAQ

FAQ — Fasteners

1) Can JM Hardware® produce customized fasteners based on drawings?
A: Yes. JM Hardware® supports customized production based on drawings, samples, or technical requirements. Customers can provide drawings (PDF/DWG/STEP), material/specification requests, and key dimensions/tolerances. JM Hardware® will review feasibility, confirm process route, and provide a quotation with lead time.
 
2) What information should I provide to get a fast and accurate quotation from JM Hardware®?
A: For an efficient quotation, JM Hardware® recommends providing:
Product type (e.g., stud bolt, carriage bolt, bolt with internal thread)
Standard (ASTM/DIN/ISO/GB or customer spec)
Size (diameter × length), thread type (metric/inch)
Material grade (e.g., stainless steel, alloy steel, carbon steel)
Surface treatment (e.g., zinc plating, HDG, black oxide, phosphate)
Quantity and target delivery time
Application environment (if corrosion/high temperature is involved)
With complete details, JM Hardware® can respond faster and reduce back-and-forth.
 
3) What materials are available for JM Hardware® fasteners?
A: JM Hardware® offers fasteners in common industrial materials such as stainless steel, carbon steel, alloy steel, aluminum alloy, copper, and other special alloys based on customer requirements. Material selection can be aligned with strength requirements, corrosion conditions, and project standards.
 
4) What surface treatments can JM Hardware® provide?
A: JM Hardware® can provide multiple surface treatments based on application needs, such as zinc plating, hot dip galvanizing (HDG), black oxide, phosphate coating, and other customized finishes. If you have coating thickness or corrosion resistance requirements, JM Hardware® can align production and inspection accordingly.
 
5) Does JM Hardware® provide samples before mass production?
A: Yes. JM Hardware® can provide samples for confirmation when required. For standard items, available samples may be provided quickly. For customized items, JM Hardware® can arrange sample production after confirming drawings/specifications. Sample lead time depends on complexity and material availability.
 
6) How does JM Hardware® control quality?
A: JM Hardware® implements quality control throughout production, including:

Raw material verification and incoming inspection
In-process inspection during forming/machining/threading
Final inspection before packing and shipment
Packaging checks and traceability labeling
This systematic approach helps JM Hardware® maintain stable product quality and reduce installation risks.
 
7) What testing and inspection can JM Hardware® provide?
A: JM Hardware® can support dimensional inspection and mechanical property verification according to product requirements. Depending on standards and customer requests, JM Hardware® may provide checks such as hardness, tensile performance verification, thread inspection, and surface condition verification. Inspection reports can be provided when required.
 
8) Can JM Hardware® supply products with nuts, washers, or complete sets?
A: Yes. JM Hardware® can supply fasteners as complete sets (e.g., stud bolt + nuts, bolt + nut + washer combinations) according to your installation needs. This helps customers reduce sourcing workload and ensures matching components for assembly.
 
9) What are JM Hardware®'s typical packaging options?
A: JM Hardware® offers export-oriented packaging options such as cartons, wooden cases, pallets, and customized packaging. Labeling can include size, grade, quantity, heat/lot information, and customer-required marks. Packaging can be adjusted to match destination logistics and warehouse requirements.
 
10) What shipping terms and logistics support can JM Hardware® provide?
A: JM Hardware® supports common international shipping arrangements and can cooperate with customer-appointed forwarders or recommend suitable logistics solutions. Typical shipment methods include sea freight, air freight, and express delivery depending on order urgency and weight/volume.
 
11) What is JM Hardware®'s lead time for standard and customized orders?
A: Lead time depends on product type, material, surface treatment, and quantity. Standard items may have shorter lead times if stock or production schedule is available. Customized fasteners usually require additional time for drawing confirmation, tooling (if needed), and sample approval. JM Hardware® will confirm lead time clearly during quotation.
 
For more information about , please feel free to contact us for technical support and quotation.