Square Neck Round Head Bolts M3 to M72 Size Range with Carbon Steel & Stainless Steel Materials for Industrial Applications

Price Negotiable

Price: USD0.1-1/PC

MOQ: 1 piece

Delivery Time: 8-20days

Brand: FLRS or　OEM

Product Description

Product Overview

Square neck round head bolts available in sizes M3 to M72 with plain, black, or zinc plated surface finishes. Manufactured from carbon steel or stainless steel materials for superior strength and corrosion resistance.

Industrial Applications

Widely used across multiple industries including machinery, automotive, infrastructure construction, power generation, and specialized engineering sectors:

Machinery and automotive manufacturing
Roads, bridges, and tunnel construction
Urban railway systems and high-speed railways
Watercraft and marine applications
Thermal, wind, and nuclear power facilities
Petrochemical and aerospace industries
Steel roof constructions and structural steel

Manufacturing Advantages

Direct manufacturer pricing with competitive rates
Advanced machinery ensuring precise workmanship and burr-free surfaces
Responsive communication and timely order processing
Small order quantities accepted for trial cooperation

Technical Specifications

Specification	Details
Size Range	M3 - M72 (standard & custom sizes available)
Material Options	Carbon Steel, Stainless Steel
Grade Standards	SAE J429 Gr.2, 5, 8; ASTM A307 Gr.A; Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9
Thread Types	UNC, UNF, BSW
Surface Finishes	Plain, Zinc Plated (Clear/Blue/Yellow/Black), Black, HDPE, Fluorocarbon Coating, XYLAN
Packing Options	Bulk in cartons on wood pallets or custom packaging