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Nuts › Nylon-Insert & All-Metal Lock Nuts

Square Nut Spring Nut Block Nut with Spring Leaf

Updated 2026-11-04 · Markdown version

Model no. F3601-M8

US$0.24 – 0.26 / piece

MOQ 1 piece · Final price confirmed in your quote

Material: Carbon Steel
Head Style: Round
Standard: DIN, GB
Grade: 8.8

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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
Type	Round Head
Model NO.	F3601-M8
Connection	Common Bolt
Head Style	Round
Standard	DIN, GB
Grade	8.8
Transport Package	Bag
Specification	SGS
Origin	China
HS Code	76042900
Production Capacity	50000 PCS/Year
P/N--JM	F3601-M8
Category	Nylon-Insert & All-Metal Lock Nuts

Technical parameters

Item	Spring Leaf Block / Roll-In T Slot Leaf Nut
P/N--JM:	F3601-M8
Material	Steel
Slot	10mm
Surface treatment	Zinc Plating
Thread	M8
Used for	4545
Port	Shenzhen
Payment terms	T/T,Paypal,Western Union
Description	Spring block are used for low and mediu-duty applications. It can be inserted at the connection spot. A small spring leaf on the rear side keeps the block in the secured locked positional...

Description

Square Nut Spring Nut Block Nut with Spring Leaf is part of our nylon-insert & all-metal lock nuts range (Nuts).

Key details

Type: Round Head
Standard: DIN, GB
Material: Carbon Steel
Grade: 8.8
Head Style: Round
Connection: Common Bolt
P/N–JM: F3601-M8

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

Ordering through Engineering Hardware & Fasteners

Minimum order is 1 piece at US$0.24 – 0.26 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 Square Nut Spring Nut Block Nut with Spring Leaf?

The listed minimum order is 1 piece, at US$0.24 – 0.26 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 Square Nut Spring Nut Block Nut with Spring Leaf?

Type: Round Head; Standard: DIN, GB; Material: Carbon Steel; Grade: 8.8; Head Style: Round; Connection: Common Bolt. 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 and 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 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$0.24 – 0.26MOQ 1 pieceGet a quote WA