Skip to main content
Home / Screws / 304 Stainless Steel Fine Thread Set Screws, Grade 12.9 Headless Hex Socket Screws, Fine Thread Machine Grub Screws M6 M8-M16

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Hardness Grade 12.9
Drive Type Hex Socket (Allen)
Head Style Headless (Grub Screw)
Thread Type Fine Thread
Available Sizes M6, M8, M10, M12, M14, M16
Surface Finish Polished
Corrosion Resistance High
Application Machinery, Automotive, Industrial Equipment
Package Contents Assorted Kit with Storage Box

6 reviews

A

Anonymous

Mar 28, 2026

Rating: 4/5

Solid choice for DIY projects

Bought these for a home repair project. They were easy to install and seem very durable. The storage box is a nice bonus for keeping them organized.

A

Anonymous

Mar 20, 2026

Rating: 5/5

Great quality stainless steel

I was worried about rust in our humid workshop, but these 304 stainless screws have held up beautifully. The fine threads provide excellent grip.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Perfect for precision machinery

These fine thread set screws are exactly what I needed for my lathe projects. The 12.9 grade hardness ensures they don't strip easily, and the hex socket fits perfectly.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Professional grade hardware

As a maintenance technician, I go through a lot of grub screws. These are consistently high quality with no defects in the threading or socket.

A

Anonymous

Mar 14, 2026

Rating: 4/5

Good value, fast shipping

The assortment kit is very convenient. One size was slightly tight, but overall a solid purchase for the price. Delivery was quicker than expected.

A

Anonymous

Mar 09, 2026

Rating: 5/5

Reliable for automotive use

Used these to secure pulleys on a custom engine build. They hold torque well and the headless design allows for a flush fit. Highly recommend.

5 FAQ

Q: What size Allen key do I need for the M8 screws?

A: For the M8 fine thread set screws in this set, you will typically need a 4mm hex key.

Q: Can I buy individual sizes if I run out of one?

A: Currently, we sell this item as an assorted kit only. However, please contact our sales team for bulk orders of specific sizes.

Q: Are these screws suitable for outdoor applications?

A: Yes, being made of 304 Stainless Steel, they offer high corrosion resistance and are suitable for most outdoor environments.

Q: Does the 12.9 grade mean they are brittle?

A: While Grade 12.9 indicates very high tensile strength, proper installation within torque specifications prevents brittleness issues. They are designed for heavy-duty industrial use.

Q: Is the thread pitch standard for fine threads?

A: Yes, all screws in this kit follow the ISO metric fine thread pitch standards for their respective diameters.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
401 Silicone-Specific Adhesive for Bonding Metal, Plastic, TPU, TPR, ABS; Silicone-to-Silicone Bonding Without Surface Treatment

401 Silicone-Specific Adhesive for Bonding Metal, Plastic, TPU, TPR, ABS; Silicone-to-Silicone Bonding Without Surface Treatment

$21.96

G80 Chain Slings for Lifting - Heavy Duty Iron Chains with Shackles and Hooks, 4-Leg Configuration, Available in 1m/2m Lengths and 6t/8t/10t Capacities

G80 Chain Slings for Lifting - Heavy Duty Iron Chains with Shackles and Hooks, 4-Leg Configuration, Available in 1m/2m Lengths and 6t/8t/10t Capacities

$312.70

Aromatherapy Essential Oil Humidifier for Home Bedroom - Long-Lasting Fragrance Diffuser, Portable Plant Incense for Car

Aromatherapy Essential Oil Humidifier for Home Bedroom - Long-Lasting Fragrance Diffuser, Portable Plant Incense for Car

$8.88

Professional Sketching Blending Stumps and Scrapers - Detail Shading Tools for Art Students

Professional Sketching Blending Stumps and Scrapers - Detail Shading Tools for Art Students

$3.28

Yuanhengtong Pen-Type Dissolved Oxygen Meter YHT8402 - For Freshwater Aquaculture Ponds (Fish & Shrimp)

Yuanhengtong Pen-Type Dissolved Oxygen Meter YHT8402 - For Freshwater Aquaculture Ponds (Fish & Shrimp)

$802.30

Smart Food Waste Disposer Smart Food Waste Processing Device Smart Kitchen Waste Treatment Unit

Smart Food Waste Disposer Smart Food Waste Processing Device Smart Kitchen Waste Treatment Unit

$12,899.00

Westwood Portable Invisible Braces Case - Orthodontic Retainer and Denture Cleaning Box

Westwood Portable Invisible Braces Case - Orthodontic Retainer and Denture Cleaning Box

$16.80

Lifting Chain with Adjuster Forklift Crane Chain Adjustable Length Manganese Steel Chain Bundling Lifting Chain with Hooks

Lifting Chain with Adjuster Forklift Crane Chain Adjustable Length Manganese Steel Chain Bundling Lifting Chain with Hooks

$54.00

Smokeless and Odorless Tea Light Candles - 2-Hour or 4-Hour Burn Time, 100 Pack for Wax Seals and Aromatherapy

Smokeless and Odorless Tea Light Candles - 2-Hour or 4-Hour Burn Time, 100 Pack for Wax Seals and Aromatherapy

$4.80

Commercial Roast Duck and BBQ Meat Warmer Display Case - Constant Temperature Heating Cabinet for Crispy Pork Belly and Hanging Ducks

Commercial Roast Duck and BBQ Meat Warmer Display Case - Constant Temperature Heating Cabinet for Crispy Pork Belly and Hanging Ducks

$755.00

Custom Company Signage, Temporary Bank Account Opening Signs, Door Plates, Acrylic Advertising Displays, and Nameplates

Custom Company Signage, Temporary Bank Account Opening Signs, Door Plates, Acrylic Advertising Displays, and Nameplates

$17.00

Imported USA PELICAN 1510 Safety Case, 20-Inch Rolling Luggage for DSLR Cameras and Moisture Protection

Imported USA PELICAN 1510 Safety Case, 20-Inch Rolling Luggage for DSLR Cameras and Moisture Protection

$39.20

Fully Automatic 801 Vegetable Cutter, Large Dual-Head Slicing/Dicing Machine for Cafeterias

Fully Automatic 801 Vegetable Cutter, Large Dual-Head Slicing/Dicing Machine for Cafeterias

$7,972.00

Cross-Border Beach Bag - Outdoor Waterproof Dry Bag with Mesh for Rafting, Swimming, and Trekking

Cross-Border Beach Bag - Outdoor Waterproof Dry Bag with Mesh for Rafting, Swimming, and Trekking

$49.60

Commercial Square Constant-Temperature Heating Cabinet Countertop Display Case for Roast Duck, Chicken, Fried Chicken, Smoked Goose, and BBQ

Commercial Square Constant-Temperature Heating Cabinet Countertop Display Case for Roast Duck, Chicken, Fried Chicken, Smoked Goose, and BBQ

$658.00

Large Capacity Thickened Waterproof Handbag - Blow Crossbody Shoulder Bag for Travel and Daily Motorcycle Use

Large Capacity Thickened Waterproof Handbag - Blow Crossbody Shoulder Bag for Travel and Daily Motorcycle Use

$127.00

Art Student Absorbent Towel for Watercolor, Oil, Acrylic Paints, Palette Paper, Traditional Chinese Painting - Double-Sided Cloth for Kids and Students

Art Student Absorbent Towel for Watercolor, Oil, Acrylic Paints, Palette Paper, Traditional Chinese Painting - Double-Sided Cloth for Kids and Students

$2.72

[Damai Micro-Needle Hair Transplant Patent] Hairline, Temple, and Crown Restoration for Thinning Hair

[Damai Micro-Needle Hair Transplant Patent] Hairline, Temple, and Crown Restoration for Thinning Hair

$7,999.00

Feileniao Traditional Chinese Painting Set with Line Art for Coloring on the Go

Feileniao Traditional Chinese Painting Set with Line Art for Coloring on the Go

$72.00

Export to USA Small Flower Pots More Beautiful Than Flowers Succulent Pots/Ceramic Pots/Letter Series

Export to USA Small Flower Pots More Beautiful Than Flowers Succulent Pots/Ceramic Pots/Letter Series

$41.00

[Group 13 Full Payment Pre-order] Thin Mint Fufu Hawthorn Berry Mint Chocolate Lolita Dog-Short Fishbone Puffy Skirt

[Group 13 Full Payment Pre-order] Thin Mint Fufu Hawthorn Berry Mint Chocolate Lolita Dog-Short Fishbone Puffy Skirt

$25.00

Wenxin Tang Cao Quan Stele Han Clerical Script Cards - Beginner Calligraphy Practice for Adults, Brush Writing Copybooks

Wenxin Tang Cao Quan Stele Han Clerical Script Cards - Beginner Calligraphy Practice for Adults, Brush Writing Copybooks

$136.00

'Eki (Station)' by Mariya Takeuchi - Mr. Chui Saxophone Trio Precise Transcription Service

'Eki (Station)' by Mariya Takeuchi - Mr. Chui Saxophone Trio Precise Transcription Service

$37.00

Pad Printing Machine Accessories: 4*4 Aluminum Ink Cup, Ink Tray, Ink Container, and Ink Trough

Pad Printing Machine Accessories: 4*4 Aluminum Ink Cup, Ink Tray, Ink Container, and Ink Trough

$40.00

KUDIS Commercial & Industrial Vacuum Cleaner - High-Power Wet/Dry Unit for Workshop Dust, Factory Floors, Warehouses, and Concrete Surfaces

KUDIS Commercial & Industrial Vacuum Cleaner - High-Power Wet/Dry Unit for Workshop Dust, Factory Floors, Warehouses, and Concrete Surfaces

$5,200.00

Rubber Speed Bump End Cap Heavy-Duty 1 Pack

Rubber Speed Bump End Cap Heavy-Duty 1 Pack

$72.46

Front Wiper Arm Assembly for Citroën C-Elysée, Xsara Picasso, Peugeot 307/301

Front Wiper Arm Assembly for Citroën C-Elysée, Xsara Picasso, Peugeot 307/301

$35.00

Underbite Corrector Case - Portable Magnetic Lanyard Storage Box for Frankel Appliance and TB Palatal Expander

Underbite Corrector Case - Portable Magnetic Lanyard Storage Box for Frankel Appliance and TB Palatal Expander

$22.70

Car Tire Stone Removal Tool, Multi-Function Hook for Picking and Extracting Stones from Treads

Car Tire Stone Removal Tool, Multi-Function Hook for Picking and Extracting Stones from Treads

$6.43

Outdoor Lamp Stand for Camping, Lantern Holder Pole for Street Vending and Night Fishing

Outdoor Lamp Stand for Camping, Lantern Holder Pole for Street Vending and Night Fishing

$13.89