The best stainless steel set screw kit depends on whether you need metric sizes, SAE sizes, or both. The Hapric kit suits buyers seeking a compact metric assortment, while the 1,305-piece and 1,500-piece kits cover metric and SAE needs. KADRICK is a smaller metric-only option with a stated length range, and GLADRVWAY is a mixed-size kit for general repair work.
| Product | Best For | Standout Detail |
|---|---|---|
| Hapric 304 Stainless Steel Set Screws | Metric repairs | 14 sizes and labeled organizer |
| Metric + SAE 1,305-Piece Kit | Broad mixed-size needs | 26 sizes and 10 hex wrenches |
| NANAKLAUS 1,500-Piece Kit | Metric and SAE coverage | 32 sizes in separate boxes |
| KADRICK 275-Piece Kit | Metric jobs needing varied lengths | 24 sizes, 3–16 mm lengths |
| GLADRVWAY 1,150-Piece Kit | General home and workshop repairs | 304 stainless steel cup-point screws |
Hapric Metric Set Screw Assortment
This kit is best for buyers who mainly work with metric fasteners and want an organized selection for routine repairs. The listed sizes span M3, M4, M5, M6, and M8, with cup-point screws made from 304 stainless steel. The labeled divider box identifies sizes and quantities, and the package includes five hex wrenches and tweezers.
The product name states 485 pieces, while the feature description states 480, so confirm the package count with the seller if an exact quantity matters. Choose this kit for metric-only tasks; avoid it if you need SAE sizes.
Metric And SAE 1,305-Piece Kit
This assortment is best for repair benches that handle both metric and inch-based hardware. It lists 26 sizes across M3 through M8 and SAE sizes from 1/8-40 to 5/16-18. The 304 stainless steel screws come with 10 hex wrenches and two tweezers. Listed applications include door knobs, faucets, lamps, locks, toys, precision machinery, and household appliances.
Choose this kit when size variety matters more than keeping the assortment small. Its broad range can be unnecessary for buyers who only need one or two metric sizes, and the supplied size list should be checked against the fastener required for a specific repair.
NANAKLAUS 1,500-Piece Metric And SAE Kit
This kit is best for users who want a large, labeled assortment with both metric and SAE coverage. It contains 32 sizes, including M3, M4, M5, M6, M8, and SAE sizes from 1/8-40 to 5/16-18. The listing describes 304 stainless steel cup-point screws, separate metric and SAE boxes, and five wrenches for each measurement system.
The cup point is intended to press into the contact surface, which can help hold a part in place when installed correctly. Choose this option for broad size coverage and organized storage. Avoid it if you need a compact kit or do not use both measurement systems.
KADRICK Metric Set Screws In 24 Sizes
KADRICK is best for metric-only work where screw length is a key selection factor. The 275-piece assortment covers M3 through M8 and lists lengths from 3 mm to 16 mm across 24 sizes. Its features describe 304 stainless steel and smooth, precise threads intended for straightforward installation and gripping.
Choose this kit when the stated length range matches your project and you do not need SAE screws. The listing refers buyers to a product image for the exact size-by-size quantities, so check that breakdown before relying on a particular length being available in a specific quantity.
GLADRVWAY 1,150-Piece Screw Assortment
This kit is best for general home, garage, or workshop repairs where a mixed assortment and supplied hex wrench are useful. The listing describes 1,150 set screws made from 304 stainless steel. It also says the cup tips are designed to bite into the contact surface and resist loosening. Suggested uses include door handles, faucets, lamps, knobs, locks, appliances, and precision equipment.
The provided product details do not specify the individual sizes or the number of wrenches. Check the listing’s size information before choosing this kit for a repair that requires a precise metric or SAE thread.
Buying Guide: How To Choose Set Screws
Do you need metric, SAE, or both?
Match the screw thread to the threaded hole. Metric sizes use an M designation, such as M4 or M6; SAE sizes are identified with inch-based fractions and thread counts. The mixed kits offer both systems, while Hapric and KADRICK focus on metric sizes. Do not assume a similar-looking metric and SAE screw will fit interchangeably.
How important are length and point style?
Compare the screw’s diameter, thread, and length with the part being secured. KADRICK explicitly lists lengths from 3 mm to 16 mm. Several other kits describe cup-point screws, which have a concave tip intended to grip the contact surface. Confirm point style and dimensions for the exact application rather than relying on the assortment’s total piece count.
What does 304 stainless steel mean for use?
These listings identify their screws as 304 stainless steel, a material selected for corrosion resistance. That does not mean a screw is immune to rust or suitable for every chemical, marine, or high-corrosion environment. Consider the surroundings and the equipment manufacturer’s fastener requirements before installation.
Which kit is easiest to organize?
Look for labeled compartments that show sizes and quantities. Hapric and NANAKLAUS specifically describe labeled storage; NANAKLAUS also separates metric and SAE screws into two boxes. Clear labels can make it easier to return unused screws to the correct compartment.
Frequently Asked Questions
What is a set screw used for?
A set screw is a headless fastener commonly used to hold a component in position against a shaft or another surface. The product listings describe uses such as securing knobs, handles, faucets, and moving parts.
Are metric and SAE set screws interchangeable?
No. Their thread systems and dimensions differ. Use the measurement system and exact thread size required by the threaded hole.
Which kit is best for metric-only repairs?
Hapric and KADRICK are metric-focused options. Hapric offers a labeled assortment with included tools, while KADRICK specifies 24 sizes and lengths from 3 mm to 16 mm.
Should I choose the kit with the most pieces?
Not necessarily. Choose based on the sizes, thread system, length range, point style, and storage you need. A smaller, better-matched assortment may be more useful than a larger kit with many unnecessary sizes.