What is "The K&S Way?"
Made in the USA
You get high-quality metals manufactured in the USA. A trusted source for durability and reliability, along with expert customer service.
Industry-Beating Lead Times
From your initial request for quote to the delivery of your custom metals, we lead with transparency & excellence in turnaround times.
Tight Tolerances
Precise, tight-tolerance cuts—created from custom-built machinery. No automation or laser shortcuts here, just 75+ years of excellence.
We are Proudly Compliant
Shop confidently for safe, quality materials. We provide lead-free materials that fall significantly below the 0.25% threshold. Our materials are REACH, RoHS, DFARS, Hazardous Materials, & Proposition 65 Compliant.
Need a Certificate of Conformance?
Need a (C or C) Certificate of Conformance for your order? Just ask. Upon request, we can provide a C of C with your order at no cost. Each C of C documents the material type, conformances, and when applicable, ASTM/Alloy information.
K&S Competitive Advantage
For over 75 years we have provided custom cut diameters for S&P 500 companies & various industry leaders. By choosing K&S, you are dedicating to precision, integrity, and excellence for your customers & shareholders.
Our Products
We specialize in high-quality, small-diameter metals of tubing, rod, sheet, & strip. We offer these shapes in alloys of brass, aluminum, copper & stainless steel.
Alloys & Tolerances
Brass Tubing (Alloy 260/272)
- Outside Diameter Tolerance: ±.002"
- Inside Diameter Tolerance: ±.002"
- Mill finish in accordance with ASTM B135 standards
- 1/2 - 3/4 hard temper
- Refers to round, square, and rectangular shapes only
Brass Rod (Alloy 260)
- Diameter Tolerance: ±.002"
- Mill finish in accordance with ASTM B134 standards
- 1/4 hard temper
Brass Sheet & Strip (Alloy 260)
- Thickness Tolerance: ±.001"
- Width Tolerance: ±.010"
- Mill finish in accordance with ASTM B36 standards
- 1/2 hard temper
Aluminum Tubing (Alloy 6061-T6 or Alloy 3003)
- Wall Thickness: .014"–.016" (Alloy 3003-H14)
- Wall Thickness: .035"–.049" (Alloy 6061-T6)
- Outside Diameter Tolerance: ±.002"–.003"
- Inside Diameter Tolerance: ±.002"–.003"
- Refers to round and square shapes only
Aluminum Rod (Alloy 1100-O or Alloy 6061)
- 1/32" - 3/32" Diameters (Alloy 1100-O)
- 1/8" - 1/2" Diameters (Alloy 6061)
- Diameter Tolerance: ±.008"
Aluminum Sheet (Alloy 3003-H14 or Alloy 6061-T6)
- .016", .032", .064" Thicknesses (Alloy 3003-H14)
- .064", .090", .125" Thicknesses (Alloy 6061-T6)
- Thickness Tolerance: ±.001"
- Width Tolerance: ±.032"
Aluminum Foil (Alloy 1100-0 & Alloy 1235-O)
- Alloy 1100-0, soft
- Alloy 1235-0, soft & brightened
Copper Tubing (Alloy 122)
- Outside Diameter Tolerance: ±.002"
- Inside Diameter Tolerance: ±.002"
- Mill finish in accordance with ASTM B251 standards
Copper Rod (Alloy 110)
- Diameter Tolerance: ±.002"
- Mill finish in accordance with ASTM B249 standards
- 1/2 hard temper
Copper Sheet & Strip (Alloy 110)
- Thickness Tolerance: ±.001"
- Width Tolerance: ±.010"
- Mill finish in accordance with ASTM B152 standards
Copper Foil (Alloy 110, Soft)
- Thickness options of .003" or .005"
Stainless Steel Tubing (Alloy 304/304L – Welded)
- Welded tubing (Not seamless)
- Complies with ASTM A269 standards
- Not telescopic
Stainless Steel Rod (Alloy 302 or Alloy 303)
- 1/16", 3/32", 1/8" diameters (Alloy 302)
- 3/16" & above diameters (Alloy 303)
Stainless Steel Sheet & Strip (Alloy 430)
- 2BA Bright Annealed Finish with PVC coating (one side)
Tin Coated Sheet (ASTM B545)
- Carbon steel sheet, tin coated
- .008" or .013" Thicknesses
Brass Channel (Alloy 260)
- Outside Diameter Tolerance: ± .007"
- Wall Thickness Tolerance: ± .001"
Brass Angle (Alloy 260)
- Wall Thickness Tolerance: ± .001"
Submit a Free Request for Quote
Our team will review your specifications and respond within 1-2 business days.
Minimum order for custom cut & OEM services: $125+ per item size
This reflects setup, handling, and review required for precision cutting.
Our custom cut services are not designed for single-piece requests. Order minimums subject to change.
Looking for standard lengths or small quantities? Browse our stocked metal sizes instead.
Serving OEM and manufacturing customers since 1946.
How it works:
1. Submit your specifications
Provide your part details and specs through our form
2. Reviewed by our team
Our team personally reviews your request
3. Quote provided within 1-2 business days
Receive a detailed quote with pricing and lead times
Ready to Get Started?
Take the first steps in partnering with K&S Precision Metals for your next project or job.
Contact Information
Phone
773-586-8503
sales@ksmetals.com
Location
Chicago, IL
Need Help?
Not sure what you need? Our experts are here to help you find the right materials for your project.
Hours of Operation
Mon - Thurs: 7:30AM - 3:30PM CST | Friday: 7:30AM - 3:00PM CST | *These hours are subject to change from holidays we observe.
Trusted by Makers & Manufacturers
See what professionals say about K&S Precision Metals
"Those tubes cut from K&S will save us tons of work. In the past, we would do it all internally, now we are more efficient."
Use case: Hand-crafted tool
Watch Jimmy's Video
"K&S Precision Metals offered a great selection of multiple diameters, including hollow tubes and solid bar stock. I used brass bar stock and plate for handmade locking mechanisms that have lasted years. Their quality and selection surpass cheap Amazon suppliers. Simply put, K&S has the specialty metals I need to make my projects succeed."
Use case: Woodworking Project
Visit Brad's ChannelIndustries Served
Trusted Across Critical Industries
Aerospace & Aviation
Supplying top-precision metals for components that demand unmatched quality, durability, and safety standards in commercial and defense aerospace applications.
Automotive
Providing custom metal parts essential for normal manufacturing, maintenance, and repair systems, meeting strict industry standards.
Medical & Dental
Delivering OEM and supporting surgical robotics, diagnostics, injection molding, and other medical devices, ensuring reliability and precision in machining equipment and medical lighting applications. Our materials also expand to dental device manufacturers delivering reliable implants that meet strict quality standards for tools and orthodontic components.
Military & Defense
Providing defense contractors with tight tolerance metals critical for rugged and mission-critical systems. We meet stringent specifications for military defense and communication systems.
Research & Development
Thousands of customers leverage our materials for their quality, consistency, and reliability as they research prototypes, develop proofs of concept, and get new products on the market.
Robotics
Delivering precision metal components essential for robotic systems, enabling accuracy, repeatability, and advanced functionality.
Semiconductors
Tech & infrastructure are rapidly expanding, so our offerings of copper & aluminum provide robust uses in an ever-growing semiconductor industry.
Technology
Offering advanced metals for emerging technologies, research and development. We provide valuable, diverse materials that empower prototyping and prototype creation in cutting-edge.
Telecommunications
Delivering products on metals used in the manufacturing of telecom infrastructure, from antenna components to connector systems, custom-built precision in coming edge.
Submit a Free Request for Quote
Our team will review your specifications and respond within 1-2 business days.
Minimum order for custom cut & OEM services: $125+ per item size
This reflects setup, handling, and review required for precision cutting.
Our custom cut services are not designed for single-piece requests. Order minimums subject to change.
Looking for standard lengths or small quantities? Browse our stocked metal sizes instead.
Serving OEM and manufacturing customers since 1946.
How it works:
1. Submit your specifications
Provide your part details and specs through our form
2. Reviewed by our team
Our team personally reviews your request
3. Quote provided within 1-2 business days
Receive a detailed quote with pricing and lead times
Ready to Get Started?
Take the first steps in partnering with K&S Precision Metals for your next project or job.
Contact Information
Phone
773-586-8503
sales@ksmetals.com
Location
Chicago, IL
Need Help?
Not sure what you need? Our experts are here to help you find the right materials for your project.
Hours of Operation
Mon - Thurs: 7:30AM - 3:30PM CST | Friday: 7:30AM - 3:00PM CST | *These hours are subject to change from holidays we observe.
Frequently Asked Questions
Find answers to common questions about our products and services
Yes! We specialize in custom cuts to your exact specifications. Whether you need specific lengths, diameters, or thicknesses, we can cut materials to meet your project requirements. Simply provide your dimensions when requesting a quote.
We maintain a comprehensive inventory of brass, aluminum, copper, stainless steel, and specialty alloys. Our stock includes tubing, rod, strip, and sheet in various sizes and grades. If you need a specific material or alloy not listed, contact us—we can often source it for you.
Most custom cut orders take 7-10 days depending on specifications and quantity.
For in-stock materials with standard cuts, we typically ship within 1-2 business days and you can purchase that material from us by clicking here.
Our order minimums for custom cuts far beat industry standards, starting at $125 per size. Request a free quote with your specific needs and we'll find a solution that works for you.
Need smaller quantities? In-stock. standard length materials can be purchased by clicking here.
We DO provide a C of C (Certificate of Conformance) upon PURCHASES.
A Certificate of Conformance includes your order / invoice number, the specific alloy or material used, and information about compliance like REACH, RoHS, DFARS, Proposition 65.
At this time, we DO NOT provide MTRs or test reports.
For information about our most common alloys & materials, click here.
We accept major credit cards, PayPal & ACH transfers. In some cases, we may offer wire transfers or net terms for qualified business accounts.
*Handling Fees may apply.
Yes! We ship throughout the United States. Shipping costs and delivery times vary by location and order size. We work with reliable carriers to ensure your materials arrive safely and on time.