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Nuts › Nylon-Insert & All-Metal Lock Nuts

High-Quality Prevailing Torque Hex Flange Nuts with Insert

Updated 2026-11-04 · Markdown version

Model no. NF E 25-506 - 1998 (R2004)

US$0.012 – 0.12 / piece

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

Material: Carbon Steel, Stainless Steel,Brass
Head Style: /
Standard: DIN, ANSI, GB, JIS, GOST, BSW
Grade: /
Standards: GB, DIN, ISO, JIS
Finished: Passivation, Zinc Plating, Black, Plainhdg, Yellow
Package Size: 10.00cm * 10.00cm * 10.00cm
Size: Reference standards and according to customer requirements

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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	Carbon Steel, Stainless Steel,Brass
Type	Locking Nuts
Model NO.	NF E 25-506 - 1998 (R2004)
Connection	/
Head Style	/
Standard	DIN, ANSI, GB, JIS, GOST, BSW
Grade	/
Standards	GB, DIN, ISO, JIS
Finished	Passivation, Zinc Plating, Black, Plainhdg, Yellow
Certificate	ISO9001/SGS
Selling Units	Building, Industry, Machinery
Package	Customer'require
Delivery Time	15-30
Transport Package	Cartons & Pallets or According to Customer''s Requ
Specification	/
Origin	Zhejiang
HS Code	7318150000
Production Capacity	100000000
Package Size	10.00cm * 10.00cm * 10.00cm
Package Gross Weight	1.000kg
Product Name	Prevailing Torque Type Hexagon Flange Nuts (With Non-Metallic Insert), Fine Pitch Thread NF E 25-506 - 1998 (R2004)
Size	Reference standards and according to customer requirements
Main Products	Non-standard parts, fasteners, stamping parts, and machined parts.
We implement a rigorous two-stage quality assurance protocol	Pre-production sampling with dimensional verification
Acceptable payment instruments	SWIFT transfer, LC at sight (negotiable for bulk orders)
Category	Nylon-Insert & All-Metal Lock Nuts

Technical parameters

Product Name:	Prevailing Torque Type Hexagon Flange Nuts (With Non-Metallic Insert), Fine Pitch Thread NF E 25-506 - 1998 (R2004)
Standard:	NF E 25-506 - 1998 (R2004)
Material:	Carbon steel / stainless steel / Brass / Aluminum / Titanium & Alloys
Size:	Reference standards and according to customer requirements
Finished:	Zinc Plated,Hot Dip Galvanized Steel,Dacromet,Nickel Plated,Black Oxide,Plain
Delivery time:	Normally in 30-40 days.

Q1. Corporate Profile & Manufacturing Capabilities

A1: Established in 2009, we are an ISO-certified fastener manufacturer and solar mounting system solutions provider headquartered in Ningbo, China. With comprehensive R&D capabilities and vertically integrated production facilities, we serve global markets including North America, Oceania, China Domestic Market, Eastern Europe, Southeast Asia, South America, Africa, and the Middle East. Our expert

Q2. Quality Assurance System

A2: We implement a rigorous two-stage quality assurance protocol: Pre-production sampling with dimensional verification Full batch inspection including torque testing, salt spray analysis, and material certification prior to container loading This dual-check system ensures consistent compliance with ASTM/ISO standards.

Q3. Core Product Portfolio

A3: Our manufacturing expertise covers: • Industrial Fastening Solutions: Hex bolts, machine screws, locking nuts, flat washers, threaded rods, blind rivets, retaining clips, and precision-engineered CNC-machined components • Solar Energy Installation Systems: Ground-mounted & rooftop solar racking systems, PV module mounting accessories, UL-certified cable management solutions, and corrosion-resi

A4: ✓ Free samples available (1-3 pcs standard specification) ✓ Express options: DHL/UPS/FedEx (customer's account) ✓ Prototyping service: Customized samples within 15 working days ✓ Note: Sample cost refundable upon bulk order confirmation

Q5. Payment Terms & Trade Services

A5: Standard commercial terms: 30% T/T deposit with 70% balance payable against Bill of Lading copy For orders under $1,000 USD, we recommend full advance payment to minimize international transaction fees Acceptable payment instruments: SWIFT transfer, LC at sight (negotiable for bulk orders)

Description

High-Quality Prevailing Torque Hex Flange Nuts with Insert is part of our nylon-insert & all-metal lock nuts range (Nuts).

Key details

Type: Locking Nuts
Standard: DIN, ANSI, GB, JIS, GOST, BSW
Material: Carbon Steel, Stainless Steel,Brass
Grade: /
Size: Reference standards and according to customer requirements
Head Style: /
Connection: /
Standards: GB, DIN, ISO, JIS

Available configurations include material, head style, standard, grade and standards. 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$0.012 – 0.12 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 High-Quality Prevailing Torque Hex Flange Nuts with Insert?

The listed minimum order is 10,000 pieces, at US$0.012 – 0.12 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 High-Quality Prevailing Torque Hex Flange Nuts with Insert?

Type: Locking Nuts; Standard: DIN, ANSI, GB, JIS, GOST, BSW; Material: Carbon Steel, Stainless Steel,Brass; Grade: /; Size: Reference standards and according to customer requirements; Head Style: /. 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 standards. 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 nylon-insert & all-metal lock nuts are available?

The Nylon-Insert & All-Metal Lock Nuts category lists 2,493 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/nuts/nylon-insert-all-metal-lock-nuts/

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$0.012 – 0.12MOQ 10,000 piecesGet a quote WA