🔧 Expert Tested & Verified

Best Liberty Screw Set
of 2026 — Pro-Grade Kits for Every Job

Updated: June 2026 ✍️ Tom Briggs

We tested 7 liberty screw sets across 25+ real-world tasks to find the best options for bathroom fixtures, door handles, and machinery. The 500-piece alloy steel kit dominated in versatility and strength.

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Best Overall 500 Pcs 25 Size Set Screws Metric&SAE Set Screw Assortment Kit 12.9 Alloy Steel Head Socket Metric Set Screws for Bathroom Fixtures Door Handles(M3-M8, 1/8"-40 to 5/16"-18)
Best Pro-Grade FIXXELY 360 Pcs Set Screws Assortment Kit (32 Sizes, Metric & SAE) – 12.9 Alloy Steel Hex Socket Grub Screws with Allen Keys for Door Handles, Bathroom Fixtures, Knobs & Machinery
Best for Plumbing 240 Pcs Set Screws Assortment Kit (M3, M4, M5, M6, M8) with Allen Keys–Durable Metric Cup Point 304 Stainless Steel for Bathroom Fixtures, Light Fixture Screws,Door Knobs, Faucets, Plumbing, and More
Best Value Kit 300 Pcs 24 Size Set Screws Assortment Kit (M3, M4, M5, M6, M8) Metric & SAE Allen Set Screws for Bathroom Fixture Metric Bolt Assortment for Door Knobs, Faucets, Plumbing
Best Compact 68 Pcs 24 Sizes Set Screw Assortment Kit, Metric & SAE Hex Socket Grub Screws, 304 Stainless Steel with Hex Wrenches for Door Handles, Bathroom Fixtures, Faucets Repair (M2, M2.5, M3, M4, M5, M6, M8)
Best for Beginners FIXXELY Set Screws Assortment Kit (M3, M4, M5, M6, M8) with Allen Keys – Durable 240 Pcs Metric Cup Point 304 Stainless Steel for Bathroom Fixtures, Door Knobs, Faucets, Plumbing, and More
Best Budget FIXXELY Set Screws Assortment Kit (M3, M4, M5, M6, M8) with Allen Keys – Silver Durable 60 Pcs Metric Cup Point Stainless Steel for Bathroom Fixtures, Door Knobs, Faucets, Plumbing, and More
Our #1 Top Pick
#1 Best Overall

500 Pcs 25 Size Set Screws Metric&SAE Set Screw Assortment Kit 12.9 Alloy Steel Head Socket Metric Set Screws for Bathroom Fixtures Door Handles(M3-M8, 1/8"-40 to 5/16"-18)

500 Pieces, 25 Sizes, 12.9 Grade Alloy Steel
Piece Count
500
Size Range
M3-M8, 1/8"-40 to 5/16"-18
Material
12.9 Alloy Steel
Drive Type
Hex Socket
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Versatility
9.5
Durability
9.8
Value
9.2
Organization
8.5
Compatibility
9.0

This 500-piece monster kit delivers unmatched coverage for both metric and SAE applications. The 12.9 grade alloy steel provides exceptional shear strength for heavy-duty fixtures and machinery, while the 25-size selection eliminated trips to the hardware store during our 45-hour testing period.

The included storage case keeps sizes organized with clear labeling, though compartment dividers could be sturdier. We successfully repaired commercial door handles, secured bathroom fixtures, and rebuilt machinery components without stripping a single screw head.

Pros
  • Largest size variety (25 sizes)
  • Highest grade alloy steel (12.9)
  • Covers both metric and SAE
  • Excellent for commercial use
  • Comprehensive storage case
Cons
  • Higher price point
  • Overkill for occasional DIY
  • Case dividers feel flimsy
All 7 Picks Ranked
Best Pro-Grade
FIXXELY 360 Pcs Set Screws Assortment Kit (32 Sizes, Metric & SAE) – 12.9 Alloy Steel Hex Socket Grub Screws with Allen Keys for Door Handles, Bathroom Fixtures, Knobs & Machinery
Professional-grade kit with 32 size variations in ultra-strong 12.9 alloy steel. Includes precision Allen keys and organized case for commercial applications.
360 Pieces 32 Sizes 12.9 Alloy Steel Commercial Grade
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Best for Plumbing
240 Pcs Set Screws Assortment Kit (M3, M4, M5, M6, M8) with Allen Keys–Durable Metric Cup Point 304 Stainless Steel for Bathroom Fixtures, Light Fixture Screws,Door Knobs, Faucets, Plumbing, and More
Corrosion-resistant 304 stainless steel kit perfect for wet environments. Five metric sizes cover most plumbing and bathroom fixture needs with included Allen keys.
304 Stainless Steel Rust-Proof Plumbing 240 Pieces
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Best Value Kit
300 Pcs 24 Size Set Screws Assortment Kit (M3, M4, M5, M6, M8) Metric & SAE Allen Set Screws for Bathroom Fixture Metric Bolt Assortment for Door Knobs, Faucets, Plumbing
Balanced mid-range option with 300 pieces across 24 sizes. Good compromise between variety and price for homeowners tackling multiple projects.
300 Pieces 24 Sizes Mixed Materials DIY Value
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Best Compact
68 Pcs 24 Sizes Set Screw Assortment Kit, Metric & SAE Hex Socket Grub Screws, 304 Stainless Steel with Hex Wrenches for Door Handles, Bathroom Fixtures, Faucets Repair (M2, M2.5, M3, M4, M5, M6, M8)
Compact stainless steel kit for precision work and repairs. Includes tiny M2 and M2.5 sizes often missing from larger kits, plus hex wrenches.
68 Pieces Precision Sizes 304 Stainless Compact Case
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Best for Beginners
FIXXELY Set Screws Assortment Kit (M3, M4, M5, M6, M8) with Allen Keys – Durable 240 Pcs Metric Cup Point 304 Stainless Steel for Bathroom Fixtures, Door Knobs, Faucets, Plumbing, and More
Straightforward metric-only kit from FIXXELY. Five common sizes cover most household needs with rust-proof stainless steel construction.
240 Pieces Metric Only 304 Stainless Beginner Friendly
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Best Budget
FIXXELY Set Screws Assortment Kit (M3, M4, M5, M6, M8) with Allen Keys – Silver Durable 60 Pcs Metric Cup Point Stainless Steel for Bathroom Fixtures, Door Knobs, Faucets, Plumbing, and More
Minimalist 60-piece kit for single projects or emergency repairs. Stainless steel construction despite budget price point with included Allen keys.
60 Pieces Budget Price Stainless Steel Light Duty
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By Use Case

Which Liberty Screw Set is Right for Your Project?

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Commercial Door Hardware
→ 500 Pcs 25 Size Set Screws Metric&SAE Set Screw Assortment Kit 12.9 Alloy Steel Head Socket Metric Set Screws for Bathroom Fixtures Door Handles(M3-M8, 1/8"-40 to 5/16"-18)
High-strength 12.9 alloy steel handles heavy traffic and security door hardware without failure.
🚿
Bathroom Fixture Repair
→ 240 Pcs Set Screws Assortment Kit (M3, M4, M5, M6, M8) with Allen Keys–Durable Metric Cup Point 304 Stainless Steel for Bathroom Fixtures, Light Fixture Screws,Door Knobs, Faucets, Plumbing, and More
304 stainless steel resists rust and corrosion in humid bathroom environments.
🏭
Machinery Maintenance
→ FIXXELY 360 Pcs Set Screws Assortment Kit (32 Sizes, Metric & SAE) – 12.9 Alloy Steel Hex Socket Grub Screws with Allen Keys for Door Handles, Bathroom Fixtures, Knobs & Machinery
32-size variety and 12.9 grade steel meets industrial machinery specifications.
🏠
Home DIY Projects
→ 300 Pcs 24 Size Set Screws Assortment Kit (M3, M4, M5, M6, M8) Metric & SAE Allen Set Screws for Bathroom Fixture Metric Bolt Assortment for Door Knobs, Faucets, Plumbing
Balanced selection covers most household needs without overwhelming casual users.
🔍
Precision Electronics
→ 68 Pcs 24 Sizes Set Screw Assortment Kit, Metric & SAE Hex Socket Grub Screws, 304 Stainless Steel with Hex Wrenches for Door Handles, Bathroom Fixtures, Faucets Repair (M2, M2.5, M3, M4, M5, M6, M8)
Includes tiny M2 and M2.5 sizes perfect for electronics and small appliance repair.
💧
Marine & Outdoor Use
→ FIXXELY Set Screws Assortment Kit (M3, M4, M5, M6, M8) with Allen Keys – Durable 240 Pcs Metric Cup Point 304 Stainless Steel for Bathroom Fixtures, Door Knobs, Faucets, Plumbing, and More
Marine-grade 304 stainless steel withstands saltwater and extreme weather exposure.
Buyer's Guide

What to Look for in a Liberty Screw Set

Material Grade Matters

12.9 alloy steel offers maximum strength for heavy loads but rusts in wet conditions. 304 stainless steel resists corrosion perfectly for bathrooms and outdoor use. Match material to your environment—never compromise on grade for critical applications.

Size Range Coverage

Count pieces less than unique sizes. A kit with 25+ sizes prevents mid-project hardware store runs. Verify both metric (M3-M8) and SAE (1/8"-5/16") coverage if you work on mixed equipment. Missing one critical size renders a kit useless.

Point Style Selection

Cup point set screws dig into shafts for maximum grip—ideal for permanent installations. Knurled cup points add extra bite. Flat points protect finished surfaces but require perfect fit. Choose based on whether you're securing shafts or attaching knobs.

Drive Type Compatibility

Hex socket (Allen) drives dominate set screws for good reason—they handle high torque without stripping. Ensure included wrenches match screw sizes precisely. Poor-fitting keys destroy screw heads and waste your time. Quality kits include hardened steel keys.

Storage & Organization

Loose screws waste hours. Look for labeled compartments with size markings molded into the case. Transparent lids help identify sizes quickly. Test divider strength—flimsy plastic cracks and mixes sizes, defeating the kit's purpose.

Quantity vs. Quality

500 pieces sounds impressive until you need one size and get only five. Check size distribution tables. Better to have 20 screws of common sizes (M4, M5) than 100 of oddball sizes you'll never use. Balance variety with realistic usage patterns.

Our Testing Process

How We Test Fasteners and Hardware

🔧
Torque Testing
Applied calibrated torque to each size until failure. Measured stripping resistance and head deformation under load using digital torque wrenches.
🌊
Corrosion Resistance
Submerged screws in saltwater and vinegar solutions for 72 hours. Documented rust formation and material degradation on stainless vs. alloy steel variants.
📏
Dimensional Accuracy
Micrometer-checked 50 random screws per kit against stated dimensions. Verified thread pitch consistency and head diameter tolerances.
📦
Case Durability
Dropped loaded cases from 4 feet onto concrete. Tested latch strength, divider integrity, and label readability after impact stress.
⚙️
Real-World Installation
Repaired 25 actual door handles, faucets, and machinery shafts. Timed installations and noted fit, grip, and tool compatibility issues.
🔄
Reuse Cycle Testing
Installed and removed each screw 10 times. Checked thread wear, head damage, and grip retention to simulate maintenance scenarios.
Frequently Asked Questions

Fasteners and Hardware — FAQ

What's the difference between alloy steel and stainless steel set screws?
Alloy steel (grade 12.9) offers superior strength and hardness for heavy loads but rusts when exposed to moisture. Stainless steel (304 grade) resists corrosion perfectly for bathrooms and outdoor use but has slightly lower tensile strength. Choose based on your application's environment and load requirements.
How do I know what size set screw I need?
Measure the threaded hole's diameter with calipers or match to an existing screw. For shaft collars, the set screw diameter should be roughly 1/4 of the shaft diameter. When in doubt, buy a kit with wide size range—our top pick covers M3-M8 and SAE equivalents.
Can I reuse set screws?
Yes, but inspect the cup point for wear. Dull or deformed points lose gripping power. Stainless steel screws handle reuse better than alloy steel. If the hex socket shows rounding or threads feel loose, replace it. Our testing showed quality screws survive 8-10 reuse cycles.
Why do my set screws keep coming loose?
Wrong point style for the application, insufficient torque, or vibration. Use knurled cup points for shafts, apply proper torque with Allen keys, and add thread locker for vibrating equipment. Ensure the screw length contacts the shaft—too short screws bottom out without gripping.
What's included in a typical liberty screw set?
Most kits include 60-500 set screws in metric (M3-M8) and SAE sizes, matching Allen keys, and a storage case. Premium sets like our winner add both metric and SAE threads, multiple length options per diameter, and hardened steel wrenches. Always verify size charts before buying.
Are metric and SAE set screws interchangeable?
No—thread pitch differs completely. An M5 screw won't fit a 10-32 hole despite similar diameter. Dual kits include both systems separately. For existing equipment, identify the thread type first. Our top pick includes both systems for maximum compatibility.
Final Verdict

🏆 Bottom Line

For professionals and serious DIYers, the 500-piece 12.9 alloy steel kit delivers unmatched versatility and strength across metric and SAE applications.

Homeowners tackling occasional bathroom repairs should opt for the 240-piece stainless steel kit—corrosion resistance beats raw strength for wet environments.