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Best Shim Stocks for 2026 That Belong in Every Toolkit
You probably do not realize how much shim stock choice can affect alignment, wear, and even corrosion over time.
If you are building a toolkit for 2026, you will want a mix of carbon steel for rigid setups, brass for easy trimming and conductivity, and stainless for damp jobs.
The right assortment can save you from improvised fixes, and the differences between packs matter more than you might expect.
More Details on Our Top Picks
Precision Brand Carbon Steel Shim Stock Assortment
[zw asin=”B00065UX42″ alt=”Precision Brand Carbon Steel Shim Stock Assortment”]Best Overall
View Latest PriceIf you need a reliable all around shim kit, this Precision Brand assortment is a strong choice. It includes four 6 inch by 50 inch rolls of full hard, cold rolled low carbon steel in 0.001, 0.002, 0.003, and 0.005 inch thicknesses. It meets ASTM A109 chemistry requirements and uses AISI 1008 and 1010 stock for dependable accuracy, flatness, and hardness. You can punch or shear it with minimal burring and distortion, which makes it suitable for tool and die setup, alignment, repairs, motor mounting, and prototype work. The green package weighs 1 pound.
- Material:Carbon steel
- Thicknesses:0.001–0.005 in
- Dimensions:6 in × 50 in
- Quantity:4 rolls
- Shape:Flat roll
- Finish:Full hard
- Additional Feature:Full hard temper
- Additional Feature:ASTM A109 chemistry
- Additional Feature:Minimum burring
Amylove Brass Shim Stock Assortment (12 Pieces)
[zw asin=”B0BLSGVM2Z” alt=”Amylove Brass Shim Stock Assortment (12 Pieces)”]Best Brass Set
View Latest PriceIf you need a versatile brass shim kit, Amylove’s 12-piece set is suited for precise repairs and DIY work. It includes six polished 6-inch by 1-inch strips in 0.002, 0.004, 0.006, 0.008, 0.012, and 0.016-inch thicknesses, with two of each for backups. The brass is sturdy but bendable, machinable, and easy to cut into washers or spacers. Burr-free edges help reduce scratches during handling. It is useful for jewelry, crafts, electrical appliances, decorative building details, and industrial repairs. With a 4.5-star rating from 225 reviews, it is a practical addition to a toolkit.
- Material:Brass
- Thicknesses:0.002–0.016 in
- Dimensions:6 in × 1 in
- Quantity:12 pieces
- Shape:Rectangular sheet
- Finish:Polished
- Additional Feature:Commercial grade brass
- Additional Feature:Smooth polished edges
- Additional Feature:Cuttable into washers
Amylove Brass Shim Stock Assortment (24 Pieces)
[zw asin=”B0BS3P7FMM” alt=”Amylove Brass Shim Stock Assortment (24 Pieces)”]Best for Variety
View Latest PriceNeed a brass shim set with real range? You get 24 pieces in six thicknesses, from 0.002″ to 0.016″, with six 6 x 1-inch strips at each size. That range lets you fine-tune gaps, align parts, and achieve precise fits without guesswork. The brass is sturdy yet flexible, so you can cut, shape, and machine it for washers, spacers, repairs, crafts, jewelry, and electrical or industrial work. You will also appreciate the smooth, polished finish and burr-free edges, which help prevent scratches. The quantity supports repeated use and easy sharing, too.
- Material:Brass
- Thicknesses:0.002–0.016 in
- Dimensions:6 in × 1 in
- Quantity:24 pieces
- Shape:Rectangular strips
- Finish:Polished
- Additional Feature:Six strips per thickness
- Additional Feature:Smooth polished edges
- Additional Feature:Cuttable into spacers
Brass Shim Stock Assortment 1″ x 6″ 6 Pieces
[zw asin=”B09V5LPSNB” alt=”Brass Shim Stock Assortment 1 x 6 6 Pieces”]Best Budget Brass
View Latest PriceThis 1″ x 6″ brass shim assortment provides an economical brass option for precise adjustments. It includes six polished pieces with thicknesses of 0.002″, 0.004″, 0.006″, 0.008″, 0.012″, and 0.016″, allowing you to fine tune fits quickly. Brass bends well, machines cleanly, cuts easily, and conducts heat efficiently, making it useful for maintenance, electrical work, DIY projects, jewelry, and crafts. Use it for gaskets, washers, spacers, shims, or decorative details. Quality control is strict, and if the product is defective, you can claim a refund of twice your purchase price.
- Material:Brass
- Thicknesses:0.002–0.016 in
- Dimensions:1 in × 6 in
- Quantity:6 pieces
- Shape:Rectangular strips
- Finish:Polished
- Additional Feature:Strict quality control
- Additional Feature:Refund guarantee
- Additional Feature:Gaskets and spacers
Amylove Stainless Steel Shim Stock Assortment (24 Pcs)
[zw asin=”B0CMXGQ7J3″ alt=”Amylove Stainless Steel Shim Stock Assortment (24 Pcs)”]Best Stainless Steel
View Latest PriceAmylove’s 24 piece 304 stainless steel set delivers reliable shim stock with corrosion resistant strength. It includes eight thicknesses from 0.02 mm to 0.3 mm in 6 inch by 1 inch strips, so you can match tight tolerances quickly. The smooth, burr free surface makes each piece easy to cut, bend, or machine for gaskets, washers, and precision repairs. Use it in machinery, electronics, stamping work, kitchen trim gaps, and home projects. The silver finish looks clean, and the steel resists rust for long term service. Wear gloves, since the edges can feel sharp.
- Material:304 stainless steel
- Thicknesses:0.02–0.3 mm
- Dimensions:6 in × 1 in
- Quantity:24 pieces
- Shape:Rectangular strips
- Finish:Smooth surface
- Additional Feature:304 stainless steel
- Additional Feature:Rust resistant
- Additional Feature:Wear gloves when using
Factors to Consider When Choosing Shim Stocks
As you choose shim stocks, match the material type to the job, since strength, corrosion resistance, and compatibility can all matter. Check the thickness range, dimensional size, hardness level, and surface finish to make sure the shim fits and performs as needed. Choosing the right combination helps you achieve accurate spacing and reliable results.
Material Type
Choosing the right shim stock material starts with the job it has to do. Steel offers high strength and full-hard options for load-bearing alignment. Brass gives you moderate strength with easy machinability. Stainless steel is the better pick whenever corrosion resistance matters. Choose steel whenever you need stiff, stable shims that hold alignment under pressure and stay flat in press-fit work. Pick 304 stainless, or another stainless grade, if humidity, washdown, or chemicals could cause rust. Use brass when you want fast cutting, punching, or bending with less burring. If your application depends on heat or electrical transfer, brass and copper alloys outperform most steels. Hardened steels might need tougher tooling, while softer metals make fabrication simpler and quicker.
Thickness Range
The right thickness range keeps your shim stack practical and precise. You should choose an assortment that reaches the smallest gap you need to fill, whether that is around 0.001″ for fine alignment or up to about 0.016″ for larger clearances. Make sure you have several discrete sizes, like 0.001″, 0.002″, 0.003″, and 0.005″, so you can stack them to hit exact totals without guesswork. Check both ends of the range against your application limits. Too thin can buckle, and too thick can lose stiffness. Also watch the tolerance and flatness of each nominal thickness, because variation adds up in stacked shims. If you expect wear or repeated adjustments, lean toward thicker, more stable options that resist creep over time.
Dimensional Size
For dimensional size, start with the thickness needed to achieve the exact clearance or buildup, then make sure the shim’s width and length fully cover the mating surfaces. Choose a thickness that matches the job, using fine increments like 0.001″ to 0.016″ for precise adjustments. Next, confirm that the shim is wide and long enough for full contact. Common strip sizes such as 1″ x 6″ or 6″ x 50″ provide room to trim or overlap. For critical fits, select stock with tight thickness tolerances and good flatness so dimensions stay consistent. Use uniform sizes when stacking shims, and confirm the thickness still fits under bolts or within the assembly without interference.
Hardness Level
After you have matched the shim size to the joint, hardness becomes the next key factor because it controls how well the stock holds its shape under load. You will usually want full-hard material, such as hard-temper cold-rolled steel, whenever you need precise alignment or heavy load support. Higher Rockwell or HV values help the shim resist creep and permanent set. If you need the shim to conform to uneven surfaces, a softer grade can work better because it bends and crimps more easily, giving you full bearing contact. You should also weigh hardness against machinability, since very hard shims can be tougher to cut or punch. Pick harder alloys for abrasive or cyclic service, and softer ones whenever thermal movement or vibration matters most.
Surface Finish
A smooth, well-finished shim surface helps the part seat evenly, lowers friction and wear, and keeps alignment stable between mating components. You should also watch surface roughness, because lower Ra values give you better contact accuracy and tighter sealing for precision fits. Avoid shims with burrs, scoring, or waviness, since those defects can keep the part from fully seating and can skew your measurements. If you need extra corrosion protection, look for coatings or platings such as zinc, nickel, or stainless passivation. These finishes can also affect hardness and lubricant behavior. For electrical or visual uses, choose a finish that supports conductivity, resists corrosion, and still looks clean. The right finish helps your shim perform predictably and last longer.
Application Fit
When you choose shim stock for a job, match its hardness, ductility, and yield strength to the load so it will not deform or fail under stress. Also, select a thickness and tolerance that provide the clearance or alignment you need. Fine adjustments often call for increments from 0.001″ to 0.016″, while wider gaps may require thicker stock up to 0.3 mm. If the part will be exposed to humidity, chemicals, or heat, choose a material with strong corrosion resistance to prevent rust or galvanic attack. Then make sure the form factor fits your process, whether you use rolls, strips, or pre cut pieces. Finally, verify that the material’s machinability and edge quality suit any on site shaping.
Cutability
Cutting shim stock well starts with matching the material to your tools and the job. When you work with stock under about 0.005 inch, you can usually shear, score, or trim it with hand tools. Thicker shims often call for snips, power shears, or a bandsaw. You should also factor in hardness and temper. Annealed brass or stainless cuts more easily than full-hard cold-rolled steel, so you will use less force and get cleaner edges. Choose sharp, high-quality snips, or carbide or bi-metal blades for tougher metals, and finer-toothed blades for delicate sheets. Wider or thicker pieces can bend or burr, so clamp them, back them up, or cut in steps. Afterward, expect deburring or light filing.
Corrosion Resistance
Corrosion resistance matters any time your shim stock will face moisture, salt, chemicals, or temperature swings. You should pick materials that naturally resist rust and pitting, such as 304 stainless steel or other corrosion-resistant alloys, whenever the environment is wet or chemically aggressive. Check the pH, chloride level, and temperature, since acidic, salty, or hot conditions speed corrosion and may call for higher-grade alloys or coatings. Also, watch for galvanic corrosion. If your shim touches a dissimilar metal in a damp setting, use an insulating barrier or keep the metals separated. For dry, short-term jobs, less-resistant metals can work. For outdoor or marine use, choose longer-life materials, even though they cost more or weigh a bit more.
Frequently Asked Questions
How Do Shim Stocks Differ From Feeler Gauges?
Shim stocks differ from feeler gauges because shim stock is used as a permanent or custom spacer, while feeler gauges are used to measure gaps. You cut shim stock to size; feeler gauges remain as precision blades.
Can Shim Stock Be Cut With Household Tools?
Yes, you can cut shim stock with household tools, like a tailor trimming cloth for a precise suit. You will get cleaner edges with sharp scissors, tin snips, or a utility knife and straightedge.
Are Shim Stocks Reusable After Removal?
Yes, you can often reuse shim stock after removal, provided it is still flat, clean, and undamaged. Inspect it for bends, burrs, or wear, because damaged shims can throw off your fit.
Which Shim Stock Works Best for Outdoor Use?
For outdoor use, stainless steel shim stock gives the best results. It stands up to rain and resists rust, handles heat without warping, and stays flat so your fit remains accurate for longer.
How Should Shim Stocks Be Stored to Prevent Corrosion?
Store shim stocks in a dry, sealed container with desiccant, and keep them off concrete. Label the materials, wipe them clean before storage, and avoid temperature swings that can trap moisture and cause corrosion.
Wrap Up
When you are dialing in a machine, a project, or a stubborn repair, the right shim stock can make precision work much easier. Keep carbon steel for tough alignment, brass for easy trimming and conductivity, and stainless steel for wet or corrosive settings. If you stock a few mixed packs and a roll or two, you will be ready for almost anything that comes to your bench.
