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

Premium A325 Bolt Nut, Custom Size with High-Precision Lock

Updated 2026-11-04 · Markdown version

US$1,584 – 1,800 / piece

MOQ 100,000 pieces · Final price confirmed in your quote

Material: Stainless Steel
Head Style: Hexagonal
Standard: DIN, ANSI, GB, JIS, BSW, GOST, Flange Nut
Grade: 12.9
Finish: Color-Zinc Plated
Coating: as Requested by Buyer
Size: as Requested by Buyer
Materials and surfaces can be tailored with precision as follows: Mechnical Property

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
Material	Stainless Steel
Type	Hexagon Head
Connection	Common Bolt
Head Style	Hexagonal
Standard	DIN, ANSI, GB, JIS, BSW, GOST, Flange Nut
Grade	12.9
Application	Chemical Industry
Finish	Color-Zinc Plated
Coating	as Requested by Buyer
Size	as Requested by Buyer
Transport Package	Carton + Pallet
Specification	25KG/Carton
Origin	China
HS Code	731816
Production Capacity	2500 Ton/Month
Materials and surfaces can be tailored with precision as follows	Mechnical Property
Packaging Details	Our Custom Size 4.8 Railway Fish Bolt Plate and Nut with Buyer Coating is expertly packaged to ensure perfection. Each unit is securely housed in a 25kg carton, meticulously designed to meet your specific requirements. Opt for pallet sizes ranging from 1.5 to 2.5 tons to maximize efficiency and safety during transit, guaranteeing your products arrive in immaculate condition.
Note	Please contact us for a personalized re-quote prior to placing an order, as fluctuations in material prices may impact the total cost. We are committed to providing transparent and current pricing.
A	About 30000 tons per year.
Q	Do you have an ISO 9001 certificate?
Category	Structural & Heavy Hex Bolts

Technical parameters

Product Name	Hex Large Washer Flange Nuts
Standard	DIN ISO ANSI/ASME JIS
Material	Carbon Steel, Alloy Steel, Brass, Stainless Steel 201, 665, 667, 304, 316 etc
Surface Treatment	Black, Zinc Plate, Dacromet, Ruspert, Magni, Zinc-Nickel, Plain, HDG, Polished, Passivation
Size	M3 M4 M5 M6 M8 M10 M12 M14 M16 M20 M22-M30 or as per drawing
Grade	4/5/6/8/10/12/A2-50/A2-70/A4-50/A4-70/A4-80/H59/H62
Application	Industry ,Machinery ,Constructrion
Certificate	ISO9001, CE, GS, RoHS, Mill Certificate, 3.1 Quality Certificate
Feature	High Strength , Corrosion-resistance , Rust-proof
Lead Time	7-25 days

Mechnical Property	Material	Surface Treatment
Class 4 / 6 / 8/ 10 /12	C45 40Cr 35CrMo 42CrMo 304 316 35K......	♦Yellow Zinc ♦Zinc Plated ♦Black Oxide ♦Phosphate ♦Dacromet ♦Geomet

Our Factory Introduction

Description

Premium A325 Bolt Nut, Custom Size with High-Precision Lock is part of our structural & heavy hex bolts range (Bolts).

Key details

Type: Hexagon Head
Standard: DIN, ANSI, GB, JIS, BSW, GOST, Flange Nut
Material: Stainless Steel
Grade: 12.9
Size: as Requested by Buyer
Head Style: Hexagonal
Finish: Color-Zinc Plated
Connection: Common Bolt

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 100,000 pieces at US$1,584 – 1,800 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 Premium A325 Bolt Nut, Custom Size with High-Precision Lock?

The listed minimum order is 100,000 pieces, at US$1,584 – 1,800 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 Premium A325 Bolt Nut, Custom Size with High-Precision Lock?

Type: Hexagon Head; Standard: DIN, ANSI, GB, JIS, BSW, GOST, Flange Nut; Material: Stainless Steel; Grade: 12.9; Size: as Requested by Buyer; Head Style: Hexagonal. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include material, head style, standard, grade and finish. 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 structural & heavy hex bolts are available?

The Structural & Heavy Hex Bolts category lists 2,565 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/

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$1,584 – 1,800MOQ 100,000 piecesGet a quote WA