Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
APPROVED VENDOR Alloy Steel Square Bar: 1.25 in Thick, 0 in/-0.005 in, 1 1/4 in x 6 ft Nominal Size (WxL) - High-Strength 4140 Alloy Steel Flat Bars
APPROVED VENDORHigh-Strength 4140 Alloy Steel Flat Bars

APPROVED VENDOR Alloy Steel Square Bar: 1.25 in Thick, 0 in/-0.005 in, 1 1/4 in x 6 ft Nominal Size (WxL)

The APPROVED VENDOR Alloy Steel Square Bar is a high-strength 4140 alloy steel flat bar, cold rolled and heat treatable, with a nominal size of 1 1/4 in x 6 ft and a thickness tolerance of 0 in/-0.005 in. It includes…

SKU 3G-OTH-591442

Brand
APPROVED VENDOR
Item
Alloy Steel Square Bar: 1.25 in Thick, 0 in/-0.005 in, 1 1/4 in x 6 ft Nominal Size
Category
High-Strength 4140 Alloy Steel Flat Bars
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
40S1.25-72
Type
0 in/-0.005 in, Mill
Fabrication
Cold Rolled
Heat Treatable
Heat Treatable
Nominal Size (WxL)
1 1/4 in x 6 ft
Thickness Tolerance
0 in/-0.005 in
Certifications Included
Material Certificate with Lot Number
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

APPROVED VENDOR Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The APPROVED VENDOR Alloy Steel Square Bar is a high-strength 4140 alloy steel flat bar, cold rolled and heat treatable, with a nominal size of 1 1/4 in x 6 ft and a thickness tolerance of 0 in/-0.005 in. It includes a Material Certificate with Lot Number for traceability.

Frequently Asked Questions

What is the APPROVED VENDOR Alloy Steel Square Bar used for?

This high-strength 4140 alloy steel square bar is used for machining shafts, gears, and tooling components that require heat treatable strength and dimensional stability. It is cold rolled for a smooth surface and tight tolerance, making it suitable for precision industrial applications across multiple sectors.

What are the specifications of the APPROVED VENDOR Alloy Steel Square Bar?

The bar has a nominal size of 1 1/4 in x 6 ft, thickness tolerance of 0 in/-0.005 in, and is cold rolled from heat treatable 4140 alloy steel. It includes a Material Certificate with Lot Number for full traceability. The manufacturer part number is 40S1.25-72.

Where to buy the APPROVED VENDOR Alloy Steel Square Bar worldwide?

3G Electric supplies the APPROVED VENDOR Alloy Steel Square Bar worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver this 4140 alloy steel bar to your facility, ensuring traceability with the included Material Certificate.

How to select the right alloy steel square bar for machining?

Select based on required strength, heat treatability, and dimensional tolerance. This cold rolled 4140 bar offers a thickness tolerance of 0 in/-0.005 in and is heat treatable for hardness after machining. Always verify nominal size and length—here 1 1/4 in x 6 ft—to match your application.

Used in

Common applications for APPROVED VENDOR
Laboratory sampling — APPROVED VENDOR clear wide mouth glass bottles for collecting and storing liquid samples in non-sterile environments.
Steam heating maintenance — APPROVED VENDOR forged brass radiator valves for regulating steam flow in commercial building heating systems.
High-pressure cleaning — APPROVED VENDOR turbo spray nozzles for pressure washers used in industrial equipment cleaning up to 6,000 psi.
Cleanroom operations — APPROVED VENDOR vinyl task chairs for seating in ISO 5 classified manufacturing or assembly areas.
General sealing — APPROVED VENDOR natural rubber stoppers for closing laboratory flasks or test tubes in educational or research settings.
Tamper-evident security — APPROVED VENDOR brass lead and wire seals for securing utility meters, cargo containers, or access panels.

APPROVED VENDOR Products

3G Electric supplies APPROVED VENDOR high-strength 4140 alloy steel flat bars. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from APPROVED VENDOR

View all APPROVED VENDOR parts →
Alloy Steel Rectangular Bar: 0.25 in Thick, 0 in/-0.007 in, 1 in x 12 in Nominal Size (WxL), Mill (MPN 40F.25X1-12). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.007 in; Certifications Included: No Certificates Included.
APPROVED VENDOR
Alloy Steel Rectangular Bar: 0.25 in Thick, 0 in/-0.007 in, 1 in x 12 in Nominal Size (WxL), Mill (MPN 40F.25X1-12). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.007 in; Certifications Included: No Certificates Included.
Alloy Steel Rectangular Bar: 0.38 in Thick, 0 in/-0.004 in, 2 1/2 in x 6 ft Nominal Size (WxL), Mill (MPN 40F.375X2.5-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.004 in; Certifications Included: Material Certificate with Lot Number.
APPROVED VENDOR
Alloy Steel Rectangular Bar: 0.38 in Thick, 0 in/-0.004 in, 2 1/2 in x 6 ft Nominal Size (WxL), Mill (MPN 40F.375X2.5-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.004 in; Certifications Included: Material Certificate with Lot Number.
Alloy Steel Rectangular Bar: 0.38 in Thick, 0 in/-0.004 in, 2 1/2 in x 6 in Nominal Size (WxL), Mill (MPN 40F.375X2.5-6). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.004 in; Certifications Included: Material Certificate with Lot Number.
APPROVED VENDOR
Alloy Steel Rectangular Bar: 0.38 in Thick, 0 in/-0.004 in, 2 1/2 in x 6 in Nominal Size (WxL), Mill (MPN 40F.375X2.5-6). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.004 in; Certifications Included: Material Certificate with Lot Number.
Alloy Steel Rectangular Bar: 0.625 in Thick, 0 in/-0.005 in, 1 1/4 in x 36 in Nominal Size (WxL) (MPN 40f.625x1.25-36). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.005 in; Certifications Included: Material Certificate with Lot Number.
APPROVED VENDOR
Alloy Steel Rectangular Bar: 0.625 in Thick, 0 in/-0.005 in, 1 1/4 in x 36 in Nominal Size (WxL) (MPN 40f.625x1.25-36). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.005 in; Certifications Included: Material Certificate with Lot Number.
Alloy Steel Square Bar: 1 in Thick, 0 in/-0.009 in, 1 in x 6 ft Nominal Size (WxL), Cold Rolled (MPN 40S1-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.009 in; Certifications Included: Material Certificate with Lot Number.
APPROVED VENDOR
Alloy Steel Square Bar: 1 in Thick, 0 in/-0.009 in, 1 in x 6 ft Nominal Size (WxL), Cold Rolled (MPN 40S1-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.009 in; Certifications Included: Material Certificate with Lot Number.
Alloy Steel Rectangular Bar: 1 in Thick, 0 in/-0.005 in, 2 1/2 in x 6 ft Nominal Size (WxL), Mill (MPN 40F1X2.5-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.005 in; Certifications Included: Material Certificate with Lot Number.
APPROVED VENDOR
Alloy Steel Rectangular Bar: 1 in Thick, 0 in/-0.005 in, 2 1/2 in x 6 ft Nominal Size (WxL), Mill (MPN 40F1X2.5-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.005 in; Certifications Included: Material Certificate with Lot Number.
Alloy Steel Rectangular Bar: 1.25 in Thick, 0 in/-0.005 in, 1 1/2 in x 6 ft Nominal Size (WxL), Mill (MPN 40f1.25x1.5-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.005 in; Certifications Included: Material Certificate with Lot Number.
APPROVED VENDOR
Alloy Steel Rectangular Bar: 1.25 in Thick, 0 in/-0.005 in, 1 1/2 in x 6 ft Nominal Size (WxL), Mill (MPN 40f1.25x1.5-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.005 in; Certifications Included: Material Certificate with Lot Number.
Alloy Steel Rectangular Bar: 1 in Thick, 0 in/-0.005 in, 1 1/4 in x 6 ft Nominal Size (WxL), Mill (MPN 40F1X1.25-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.005 in; Certifications Included: Material Certificate with Lot Number.
APPROVED VENDOR
Alloy Steel Rectangular Bar: 1 in Thick, 0 in/-0.005 in, 1 1/4 in x 6 ft Nominal Size (WxL), Mill (MPN 40F1X1.25-72). Key specifications — Brand: APPROVED VENDOR; Fabrication: Cold Rolled; Heat Treatable: Heat Treatable; Thickness Tolerance: 0 in/-0.005 in; Certifications Included: Material Certificate with Lot Number.