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Screws › Button, Pan & Round-Head Screws

Durable Round Headed Square Neck Carriage Bolt for Heavy-Duty Applications

Updated 2026-11-04 · Markdown version

US$1.20 – 1,200 / piece

MOQ 10,000 pieces · Final price confirmed in your quote

Head Style: Round
Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni
Grade: 4.8
Material Name: 40cr/45/B7/35CrMo/304/316/C1022
Surface Treatment: Zinc Plated
Thread Tolerance: 6g/6h/6az
Package Size: 25.00cm * 25.00cm * 14.00cm
Material: Carbon Steel

Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order.

Specifications

Connection	Screws
Head Style	Round
Standard	DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni
Grade	4.8
Material Name	40cr/45/B7/35CrMo/304/316/C1022
Property Class	Class8.8/10.9/12.9/2h
Surface Treatment	Zinc Plated
Thread Tolerance	6g/6h/6az
Application Fields	Wind Energy/Autoparts/Excavator/Machines
Transport Package	Carton+Pallet
Specification	25kg/carton
Origin	China
HS Code	731815
Production Capacity	2500tons/Month
Package Size	25.00cm * 25.00cm * 14.00cm
Package Gross Weight	25.000kg
Customization	Available
Material	Carbon Steel
Type	Screws
Shipping Cost	Contact the supplier about freight and estimated delivery time.
Category	Button, Pan & Round-Head Screws

Technical parameters

Mechnical Property	Material	Surface Treatment
Class 6 / 8/ 10 /12	ML08AL Q235B C45 40Cr 35CrMo 42CrMo	♦Yellow Zinc ♦Zinc Plated ♦Black Oxide ♦Phosphate ♦Dacromet ♦Geomet

MAIN PRODUCTS

Our Factory Introduction

Description

Durable Round Headed Square Neck Carriage Bolt for Heavy-Duty Applications is part of our button, pan & round-head screws range (Screws).

Key details

Type: Screws
Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni
Material: Carbon Steel
Grade: 4.8
Head Style: Round
Surface Treatment: Zinc Plated
Connection: Screws
Material Name: 40cr/45/B7/35CrMo/304/316/C1022

Available configurations include head style, standard, grade, material name and surface treatment. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 10,000 pieces at US$1.20 – 1,200 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you.

Frequently asked questions

What is the minimum order quantity (MOQ) for Durable Round Headed Square Neck Carriage Bolt for Heavy-Duty Applications?

The listed minimum order is 10,000 pieces, at US$1.20 – 1,200 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size.

What are the main specifications of Durable Round Headed Square Neck Carriage Bolt for Heavy-Duty Applications?

Type: Screws; Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni; Material: Carbon Steel; Grade: 4.8; Head Style: Round; Surface Treatment: Zinc Plated. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include head style, standard, grade, material name and surface treatment. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing.

What is the lead time and how is it shipped?

Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment.

Which other button, pan & round-head screws are available?

The Button, Pan & Round-Head Screws category lists 1,831 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/screws/button-pan-round-head-screws/

How we work

Specified, checked and shipped by Engineering Hardware & Fasteners

Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing.

DIN, ISO, ASTM, ANSI, JIS and GB standard parts
Non-standard parts made to your drawing
Dimensions, thread gauges and plating checked before packing
Export cartons and pallets, consolidated mixed orders
Samples available for approval before mass production

More about us → · Request a sample or custom quote →

Request a quote for this product

US$1.20 – 1,200MOQ 10,000 piecesGet a quote WA