Standard & made-to-drawing parts
Checked before shipping
Air, sea & express delivery

Gr4.8 Blue Galvanized Square Head Set Screw

Updated 2026-11-04 · Markdown version

Model no. bolt

US$1.20 – 1.68 / piece

MOQ 500 pieces · Final price confirmed in your quote

Aluminum grade: 6061, 6063

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

Customization	Available
Transport Package	Cartons
Specification	M6 M8 M10 M12
Model NO.	bolt
Origin	Ningbo, Zhejiang
HS Code	8483109000
Production Capacity	50000pieces/Yeae
Carbon steel	10#, 18#, 1018, 22#, 1022, 40Cr, 45#, 1045, 50#, 55#, 60#, 65Mn, 70#, 72B, 80#, 82B
Alloy Structure Steel	B7, 20CrMo, 42Crmo, SCM415, SCM440, 4140
High-carbon chromium bearing steel	GCr15, 52100, SUJ2
Free-cutting steel	12L14, 12L15
Stainless steel	1Cr13, 2Cr13, 3Cr13, 4Cr13, 1Cr17, SUS410, SUS420, SUS430, SUS416, SUS440C, 17-4, 17-4PH, 130M, 200, 201, 202, 205, 303, 303Cu, 304, 316, 316L
Aluminum grade	6061, 6063
Brass	Hpb58-2.5 (C38000), Hpb59-1 (C37710), Hpb61-1 (C37100), Hpb62-0.8 (C35000), Hpb63-0.1 (C34900), Hpb63-3 (C34500), H60, H62, H63, H65
Category	Set, Grub & Socket Set Screws

Technical parameters

Application	motor or electric motor	Certification	ISO
Material	carbon steel(According to Drawing)	Type	Motor shaft
Size	According to Drawing	Diameter	6-50mm
Diameter Tolerance	0.005mm	Length	5-800mm
Roughness	Ra0.05	Transport Package	Plastic Bags Inside and Standard Cartons Outside
Hardness	HRC	Origin	Ningbo, Zhejiang

Material	Carbon steel: 10#, 18#, 1018, 22#, 1022, 40Cr, 45#, 1045, 50#, 55#, 60#, 65Mn, 70#, 72B, 80#, 82B Alloy Structure Steel: B7, 20CrMo, 42Crmo, SCM415, SCM440, 4140 High-carbon chromium bearing steel: GCr15, 52100, SUJ2 Free-cutting steel: 12L14, 12L15 Stainless steel: 1Cr13, 2Cr13, 3Cr13, 4Cr13, 1Cr17, SUS410, SUS420, SUS430, SUS416, SUS440C, 17-4, 17-4PH, 130M, 200, 201, 202, 205, 303, 303Cu, 304,
Diameter	6-50mm
Length	5-800mm
Diameter Tolerance	0.005mm
Hardness	HRC
Heat treatment	1. Oil Quenching 2. High frequency quenching 3. Carburization 4. Vacuum Heat treatment 5. Mesh belt furnace heat treatment
Surface treatment	1. Plating nickel 2. Plating zinc 3. Plating passivation 4. Plating phosphating 5. Black coating 6. Anodized treatment 7.
Packing	Plastic bags inside and standard cartons outside. Shipment by pallets or according to customer's packing specifications

Description

Gr4.8 Blue Galvanized Square Head Set Screw is part of our set, grub & socket set screws range (Screws).

Key details

Alloy Structure Steel: B7, 20CrMo, 42Crmo, SCM415, SCM440, 4140
High-carbon chromium bearing steel: GCr15, 52100, SUJ2
Free-cutting steel: 12L14, 12L15
Aluminum grade: 6061, 6063

Available configurations include aluminum grade. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 500 pieces at US$1.20 – 1.68 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 Gr4.8 Blue Galvanized Square Head Set Screw?

The listed minimum order is 500 pieces, at US$1.20 – 1.68 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 Gr4.8 Blue Galvanized Square Head Set Screw?

Alloy Structure Steel: B7, 20CrMo, 42Crmo, SCM415, SCM440, 4140; High-carbon chromium bearing steel: GCr15, 52100, SUJ2; Free-cutting steel: 12L14, 12L15; Aluminum grade: 6061, 6063. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include aluminum grade. 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 set, grub & socket set screws are available?

The Set, Grub & Socket Set Screws category lists 1,721 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/screws/set-grub-socket-set-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 – 1.68MOQ 500 piecesGet a quote WA