Qbh Customized ASTM A394 Knurled Substations Steel Communication Electrical Transmission Tower Reinforcement Step Bolt Nut External/Internal Threaded Fasteners

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Product Description

Basic Specifications

Model NO.
ASTM A394 T-1
Connection
Common Bolt
Head Style
Round
Standard
DIN, ANSI, GB, JIS, BSW, GOST, ASTM, ISO, etc.
Application
Steel Structure, Communication Tower
Finish
HDG, Zp, Black, Dacromet, etc.
Transport Package
25kg/CTN
Specification
3/4-8/12

Product Description

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Step Bolts for Infrastructure

Step Bolts are essential components used for a variety of applications, specifically designed for Steel Communication, Electrical Transmission Towers, and Tower Reinforcement. These high-strength fasteners feature low carbon steel bodies and are ideal for use with heavy hex nuts in demanding fastening jobs.

Step Bolt Detail
Bolt View
Bolt Diameter D (Head Diameter) F (Head Height) H (Step Length)
5⁄8" 0.652 2" ± 1⁄8" 1/2" ± 1⁄8"
3⁄4" 0.75 2" ± 1⁄8" 1/2" ± 1⁄8"

ASTM A394 Specifications

The ASTM A394 Specification covers chemical and mechanical requirements for hexagon and square-head zinc-coated steel bolts. These are specifically manufactured for atmospheric corrosion resistance in the construction of:

  • Transmission Towers
  • Substations
  • Steel Structural Projects
  • Bridges and Highway Structures
Transmission Tower Part
Bolt Manufacturing
Fastener Variety

Bolt Types Classification:

Type 0: Hot-dip zinc-coated bolts (Low or medium carbon steel).
Type 1: Medium carbon steel, quenched and tempered.
Type 2 & 3: Bare or quenched/tempered bolts made of weathering steel.

Manufacturing & Finishes

Standard step bolts are manufactured in 5/8″ and 3/4″ diameters. They are typically provided with heavy hex nuts to ensure secure installation against the thread run out. The unthreaded shank (step length) typically ranges from 6″ to 10″.

Available Finishes:

PLAIN / ZP / YZP / BLACK / HDG / DACROMET / GEOMET / CHROME / NICKEL

Finished Bolt
Quality Check

Our Core Advantages

  • Strict Quality Assurance: Every production link is inspected.
  • Customization: Non-standard parts produced according to drawings.
  • Industry Expertise: 15+ years of experience in fastener solutions.
  • Global Standards: Collaborations with TUV for quality escorting.
  • Comprehensive Range: Selection includes Studs, Double-End, Carriage, and Hex Bolts.
Service Advantages

Frequently Asked Questions

What is your experience in the fastener industry?
Our management team has been engaged in the export and manufacture of fasteners since 2005, providing professional technical and export services.
How do you ensure product quality?
We have a dedicated quality control department that inspects every production link. We provide MTC (Mill Test Certificate) once the production is finished.
What are the typical delivery times?
Stock items are delivered within 2-5 days. For standard container orders (1-2 containers), delivery is usually 18-25 days. Priority production is available for urgent needs.
What are your standard packing options?
Our standard packing is 20-25kg per carton, with 36-48 cartons per pallet. We also offer customization for boxes, plastic bags, or iron drums according to requirements.
Do you provide samples?
Yes, we provide free samples for standard fasteners to help customers verify the quality before placing bulk orders.
What payment terms do you accept?
We accept T/T and L/C for general orders. For small orders or sample requests, PayPal and Western Union are also accepted.

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