Skip to main content
Home / Screws / 304 Stainless Steel Hex Socket Captive Screws, Non-Loosening Screws, Non-Ejecting Partial Thread Bolts M3 M4 M5 M6 M8mm

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Hex Socket (Allen)
Thread Type Partial Thread, Coarse
Feature Captive/Non-Ejecting Design
Available Sizes M3, M4, M5, M6, M8
Finish Polished Silver
Drive Size Metric Hex Key Required
Application Electronics, Machinery, Enclosures
Corrosion Resistance High (Indoor & Outdoor)
Package Content Assorted Kit with Storage Box

6 reviews

A

Anonymous

Mar 20, 2026

Rating: 5/5

Professional grade fasteners

Using these for industrial equipment panels. They hold up well against vibration and the non-loosening feature is genuine.

A

Anonymous

Mar 14, 2026

Rating: 5/5

No more lost screws!

The captive design works perfectly. Even when fully unscrewed, the bolt stays attached to the panel. Saves so much time during maintenance.

A

Anonymous

Mar 12, 2026

Rating: 5/5

Perfect for server rack assembly

These captive screws are a lifesaver. The non-ejecting feature means I don't drop screws inside the chassis anymore. The 304 steel feels very durable.

A

Anonymous

Mar 10, 2026

Rating: 4/5

Good quality, slightly stiff at first

The build quality is excellent. They were a bit tight to turn initially but loosened up after a few uses. Great value for the price.

A

Anonymous

Mar 07, 2026

Rating: 4/5

Solid hardware

Good stainless steel quality. I wish the kit came with a small Allen key included, but otherwise, no complaints.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Exactly what I needed for my CNC project

Ordered the M5 size. Threads are clean and the hex socket hasn't stripped even after multiple installations. Highly recommend.

5 FAQ

Q: Can I get a VAT invoice for this purchase?

A: Yes, as mentioned in the product description, we provide a 13% VAT invoice. Please request it during checkout or contact us after purchase.

Q: What is the length of the threaded portion on the M4 screws?

A: For the M4 size in this series, the partial thread length is approximately 10mm, while the unthreaded shank allows for the captive mechanism to function.

Q: Is the M8 size suitable for outdoor electrical boxes?

A: Yes, since these are made from 304 Stainless Steel, they offer high corrosion resistance and are suitable for most outdoor applications.

Q: Will these fit standard metric threaded holes?

A: Absolutely. These screws adhere to standard metric threading specifications for M3 through M8 sizes and will fit corresponding tapped holes.

Q: Do these screws come with the matching Allen keys?

A: No, the package contains only the screws. You will need to use your own metric hex key set appropriate for the screw size you selected.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
Upgraded Commercial Constant-Temperature Heated Display Cabinet for Fried Chicken, Meat Pies, and Breakfast Pastries

Upgraded Commercial Constant-Temperature Heated Display Cabinet for Fried Chicken, Meat Pies, and Breakfast Pastries

$5,510.00

2025 New Waterproof Swim Bag with Dry-Wet Separation - Lightweight Gym and Beach Tote for Men and Women

2025 New Waterproof Swim Bag with Dry-Wet Separation - Lightweight Gym and Beach Tote for Men and Women

$14.80

4-Piece Canvas Stretching Tool Set with Wide-Jaw Pliers, Manual Staple Gun, and Starter Tool for Oil Painting Frames, Includes Tutorial

4-Piece Canvas Stretching Tool Set with Wide-Jaw Pliers, Manual Staple Gun, and Starter Tool for Oil Painting Frames, Includes Tutorial

$10.20

Construction Anti-crack Steel Wire Mesh 4mm for Concrete Floors - Thickened Galvanized Iron Grid

Construction Anti-crack Steel Wire Mesh 4mm for Concrete Floors - Thickened Galvanized Iron Grid

$10.59

Japanese Dopamine Style Portable Retainer Case with Mirror - Storage Box for Invisible Aligners and Dentures

Japanese Dopamine Style Portable Retainer Case with Mirror - Storage Box for Invisible Aligners and Dentures

$16.00

Traditional Rattle Drum Toy for Infants - Old-Style Handheld Bell, Wave Shaker, and Sand Hammer for Newborns Aged 0-1 Year; Suitable for Boys and Girls

Traditional Rattle Drum Toy for Infants - Old-Style Handheld Bell, Wave Shaker, and Sand Hammer for Newborns Aged 0-1 Year; Suitable for Boys and Girls

$6.90

Low-Temperature Plasma Oil Fume Purifier Electrostatic Ion Module Equipment Rubber Plastic Smoke Treatment Device

Low-Temperature Plasma Oil Fume Purifier Electrostatic Ion Module Equipment Rubber Plastic Smoke Treatment Device

$1,600.00

Chunfei Grocery Store - Yun'an GR02 Gravel Bike, Thru-Axle, Disc Brake, Lightweight Touring with Multiple Rack Mounts

Chunfei Grocery Store - Yun'an GR02 Gravel Bike, Thru-Axle, Disc Brake, Lightweight Touring with Multiple Rack Mounts

$7,977.00

Cashmir Blending Knife Replacement Head Set, Sketch Neony Blending Heads, Sponge Blending Heads, Breathing Cotton for Art Students

Cashmir Blending Knife Replacement Head Set, Sketch Neony Blending Heads, Sponge Blending Heads, Breathing Cotton for Art Students

$4.34

Natural Amethyst, Rose Quartz, Clear Quartz, and Lemon Quartz Double-Pointed Tumbled Beads for DIY Bracelets, Necklaces, and Earrings

Natural Amethyst, Rose Quartz, Clear Quartz, and Lemon Quartz Double-Pointed Tumbled Beads for DIY Bracelets, Necklaces, and Earrings

$1.70

Accordion-Style Watercolor Sketchbook, 32k Foldable Blank Paper, 300g Cotton Pulp Fine Texture for Painting, A4 Stamp Collection Travel Journal, DIY Sticker Art Notebook

Accordion-Style Watercolor Sketchbook, 32k Foldable Blank Paper, 300g Cotton Pulp Fine Texture for Painting, A4 Stamp Collection Travel Journal, DIY Sticker Art Notebook

$9.70

Electric Watercolor Spray Pen Children Hand-painted Color Pa

Electric Watercolor Spray Pen Children Hand-painted Color Pa

$52.55

VFD 2.2kW 9.8A Single Phase 220V

VFD 2.2kW 9.8A Single Phase 220V

$1,919.00

Printmaking Press Machine - Large Format Etching and Woodblock Printer for School Art Classes and Clubs

Printmaking Press Machine - Large Format Etching and Woodblock Printer for School Art Classes and Clubs

$583.11

Bread Rattle Superman Maraca Baby 0-1 Year Soothing Tool Newborn Safe to Chew Grip Training Hand Rattle

Bread Rattle Superman Maraca Baby 0-1 Year Soothing Tool Newborn Safe to Chew Grip Training Hand Rattle

$8.80

Direct Supply 0.75kw Laboratory Frame Mixer - Suitable for Mixing Fluid Materials, Adhesives, and Lithium Battery Applications

Direct Supply 0.75kw Laboratory Frame Mixer - Suitable for Mixing Fluid Materials, Adhesives, and Lithium Battery Applications

$2,395.00

Yonghe Hair Transplant Follicle Detection and Scalp Health Assessment - Consultation and Photodynamic Therapy Experience

Yonghe Hair Transplant Follicle Detection and Scalp Health Assessment - Consultation and Photodynamic Therapy Experience

$0.10

Continental CSC5 Tires – Sizes 215/225/235/245/255 x 40/45/50/55 R17/18/19/20/21

Continental CSC5 Tires – Sizes 215/225/235/245/255 x 40/45/50/55 R17/18/19/20/21

$725.00

Commercial High-Speed Fruit and Vegetable Crusher and Puree Maker, Continuous Processing Equipment for Galangal, Fresh Ginger, Bell Peppers, and Tomatoes

Commercial High-Speed Fruit and Vegetable Crusher and Puree Maker, Continuous Processing Equipment for Galangal, Fresh Ginger, Bell Peppers, and Tomatoes

$17,980.00

DIY Scented Candle Molds - 24 Popular Korean Acrylic PC Styles: Cylinder, Pointed Top, Flat Top, Square, Shell

DIY Scented Candle Molds - 24 Popular Korean Acrylic PC Styles: Cylinder, Pointed Top, Flat Top, Square, Shell

$10.80

Custom Solid Wood Plaque and Couplet Carving - Wooden Shop Signage, Arched Door Headers, and Grand Opening Engravings

Custom Solid Wood Plaque and Couplet Carving - Wooden Shop Signage, Arched Door Headers, and Grand Opening Engravings

$174.00

New Direct-Sale 326 Instant Glue - High-Strength Structural Adhesive for Metal, Heat Resistant, Anti-Aging, Ideal for Car Rearview Mirrors

New Direct-Sale 326 Instant Glue - High-Strength Structural Adhesive for Metal, Heat Resistant, Anti-Aging, Ideal for Car Rearview Mirrors

$26.54

Zhong Shaojing Lingfei Jing Small Regular Script Water Writing Cloth for Calligraphy Practice - Reusable Quick-Dry Mat

Zhong Shaojing Lingfei Jing Small Regular Script Water Writing Cloth for Calligraphy Practice - Reusable Quick-Dry Mat

$22.53

New 968 Fast-Drying Super Glue - Strong Bond for Metal, Magnets, Rubber, and Aluminum Alloy

New 968 Fast-Drying Super Glue - Strong Bond for Metal, Magnets, Rubber, and Aluminum Alloy

$18.20

German Imported Stone Removal Hook Car Tire Stone Cleaning Tool Vehicle Foldable Multi-Function Stone Remover

German Imported Stone Removal Hook Car Tire Stone Cleaning Tool Vehicle Foldable Multi-Function Stone Remover

$11.34

[10% Off for 2 Items] Double-Sided Wool Felt Mat for Calligraphy and Painting, Student Practice Sheet, Brush Writing Desk Pad, Four Treasures of the Study Set

[10% Off for 2 Items] Double-Sided Wool Felt Mat for Calligraphy and Painting, Student Practice Sheet, Brush Writing Desk Pad, Four Treasures of the Study Set

$6.63

In Stock Special Offer: QS18VP6LLPQ8 Sensor - Price Negotiable

In Stock Special Offer: QS18VP6LLPQ8 Sensor - Price Negotiable

$600.00

Broccoli Vegetable Washing Machine for Pre-made Dishes, Water Bath Cleaning Equipment with Bubble System for Herbs and Export-Grade Produce

Broccoli Vegetable Washing Machine for Pre-made Dishes, Water Bath Cleaning Equipment with Bubble System for Herbs and Export-Grade Produce

$615.00

Hongkedou Oxford Fabric Bag-in-Bag Divider Insert, Stiff Makeup Organizer with Zipper, Waterproof Small Women's Pouch

Hongkedou Oxford Fabric Bag-in-Bag Divider Insert, Stiff Makeup Organizer with Zipper, Waterproof Small Women's Pouch

$22.00

Pad Printing Machine Accessories: Positioning Clamps, T-Shaped Holders, and Locking Irons

Pad Printing Machine Accessories: Positioning Clamps, T-Shaped Holders, and Locking Irons

$0.60