Skip to content

Need help?

Call us 850.764.BOLT (2658)
Sales@MonsterBolts.com

Follow Us

  • Facebook
  • Twitter
  • Instagram
  • Pinterest
  • Metric Fasteners
  • Hex Bolts
  • Cable Ties
  • Hex Keys / Bits
  • Work Gloves
  • U.S. / Inch Fasteners
  • Hex Cap / Hex Flange Bolts
  • L9 Fasteners - Heavy-Duty / Made In USA
  • Carriage Bolts
  • Hex Lag Screws / Lag Bolts
  • Rivets
  • Cable Ties
  • Hex Keys / Bits
  • Work Gloves
  • Sheet Metal & Construction Screws
  • Drywall Screws
  • Hex Lag Bolts
  • Wood / Deck Screws
  • Concrete Anchors
  • Rivets
  • Cable Ties
  • Magnetic Nutsetters
  • Washers - EPDM Bonded
  • Boat Lift Rigging
  • Work Gloves
  • Electrical Connectors
  • Sealed Butt Connectors
  • Sealed Step-Down Butt Connectors
  • Sealed Ring Terminals
  • Sealed Slip-On Quick Disconnects
  • Cable Ties
  • BULK Pricing
  • Contact Us / Fastener Info.
  • Fastener Info
  • Fastener Related Blog
  • Contact Monster Bolts
  • Socket Screws
  • Button Head Screws
  • Flat Head (Countersunk) Screws
  • Socket Head Cap Screws
  • Low Head Socket Cap Screws
  • Set Screws
  • Nuts
  • Hex Nuts
  • Nylon Insert Locknuts
  • Acorn Nuts
  • All Metal Locknuts
  • Flange Nuts
  • Square Nuts
  • Coupling Nuts
  • Threaded Inserts for Plastic
  • Washers
  • Flat Washer
  • Split Lock Washer
  • Fender Washers
  • Thick Flat Washers
  • Machine Screws
  • Phillips Pan Head
  • Phillips Flat Head
  • Socket Screws
  • Button Head Screws
  • Flat Head (Countersunk)
  • Socket Head Cap Screws
  • Low Head Socket Cap
  • Set Screws
  • Machine Screws
  • Phillips Pan Head
  • Phillips Flat Head
  • Self-Tapping Sheet Metal screws
  • Pan Head Sheet Metal Screws
  • Flat Head Sheet Metal Screws
  • Self-Drilling TEK Sheet Metal Screws
  • Phillips Pan Head TEK Screws
  • Hex Washer Head TEK Screws
  • Hex Washer Head TEK Screws w/ Bonded Washer
  • EPDM Bonded Sealing Washers
  • Wood / Deck Screws
  • Stainless - Flat Head Type 17 w/ Nibs
  • Outdoor WAR Coated Screws
  • Carriage Bolts
  • Hex Lag Screws / Lag Bolts
  • Threaded Inserts for Wood
  • Bits
  • Nuts
  • Hex Nuts
  • Nylon Insert Locknuts
  • Flange Nuts
  • Tee Nuts
  • Wing Nuts
  • Threaded Inserts
  • Washers
  • Flat Washer
  • Fender Washers
  • Structural Washers
  • Split Lock Washer
  • Self-Drilling Screws
  • Phillips Pan Head TEK Screws
  • HWH (Hex Washer Head) TEK Screws
  • HWH w/ Bonded Washer
  • Magnetic Nutsetters
  • Self-Tapping Screws
  • Flat Head Screws
  • Phillips Pan Head
  • Atlas - Metal-to-Wood roofing screws
  • - TEK Screw Info.
  • TEK Screw installation pointers
  • Metric Bulk B2B pricing
  • Socket Screws
  • Hex Cap / Hex Flange Bolts
  • Machine Screws
  • Screws for Plastic (30° PT & 45° Plastite)
  • Thread-Forming screws
  • Nuts
  • Washers
  • US / Inch Bulk B2B pricing
  • Socket Screws
  • Machine Screws
  • Hex Cap / Hex Flange Bolts
  • Carriage Bolts
  • Hex Lag Screws / Lag Bolts
  • Sheet Metal / TEK screws
  • Drywall / Framing Screws
  • Nuts
  • Washers
  • Anchor for Concrete & Drywall
  • L9 Extreme Strength Fasteners
  • Thread-Cutting Screws (Type 1, 23, 25, Type F)
  • Thread-Rolling (Taptite)
  • Thread-Forming Screws (PT, EJOT)
  • Made in USA Fasteners
Monster Bolts Monster Bolts

Quick Links

  • Electrical Connectors
  • Tek Screws
  • Metric - Socket Products
  • Metric - Stainless Steel products
  • Metric - Marine Grade Stainless products
  • Guitar - Parts
Login / Signup
My account
0
Cart

Your cart is empty

Shop our products
  • Metric Fasteners
    • Socket Screws
      • Button Head Screws
      • Flat Head (Countersunk) Screws
      • Socket Head Cap Screws
      • Low Head Socket Cap Screws
      • Set Screws
    • Hex Bolts
    • Nuts
      • Hex Nuts
      • Nylon Insert Locknuts
      • Acorn Nuts
      • All Metal Locknuts
      • Flange Nuts
      • Square Nuts
      • Coupling Nuts
      • Threaded Inserts for Plastic
    • Washers
      • Flat Washer
      • Split Lock Washer
      • Fender Washers
      • Thick Flat Washers
    • Machine Screws
      • Phillips Pan Head
      • Phillips Flat Head
    • Cable Ties
    • Hex Keys / Bits
    • Work Gloves
  • U.S. / Inch Fasteners
    • Socket Screws
      • Button Head Screws
      • Flat Head (Countersunk)
      • Socket Head Cap Screws
      • Low Head Socket Cap
      • Set Screws
    • Hex Cap / Hex Flange Bolts
    • L9 Fasteners - Heavy-Duty / Made In USA
    • Machine Screws
      • Phillips Pan Head
      • Phillips Flat Head
    • Carriage Bolts
    • Self-Tapping Sheet Metal screws
      • Pan Head Sheet Metal Screws
      • Flat Head Sheet Metal Screws
    • Self-Drilling TEK Sheet Metal Screws
      • Phillips Pan Head TEK Screws
      • Hex Washer Head TEK Screws
      • Hex Washer Head TEK Screws w/ Bonded Washer
      • EPDM Bonded Sealing Washers
    • Wood / Deck Screws
      • Stainless - Flat Head Type 17 w/ Nibs
      • Outdoor WAR Coated Screws
      • Carriage Bolts
      • Hex Lag Screws / Lag Bolts
      • Threaded Inserts for Wood
      • Bits
    • Hex Lag Screws / Lag Bolts
    • Nuts
      • Hex Nuts
      • Nylon Insert Locknuts
      • Flange Nuts
      • Tee Nuts
      • Wing Nuts
      • Threaded Inserts
    • Washers
      • Flat Washer
      • Fender Washers
      • Structural Washers
      • Split Lock Washer
    • Rivets
    • Cable Ties
    • Hex Keys / Bits
    • Work Gloves
  • Sheet Metal & Construction Screws
    • Self-Drilling Screws
      • Phillips Pan Head TEK Screws
      • HWH (Hex Washer Head) TEK Screws
      • HWH w/ Bonded Washer
      • Magnetic Nutsetters
    • Self-Tapping Screws
      • Flat Head Screws
      • Phillips Pan Head
      • Atlas - Metal-to-Wood roofing screws
    • Drywall Screws
    • Hex Lag Bolts
    • Wood / Deck Screws
    • Concrete Anchors
    • Rivets
    • Cable Ties
    • Magnetic Nutsetters
    • Washers - EPDM Bonded
    • Boat Lift Rigging
    • Work Gloves
    • - TEK Screw Info.
      • TEK Screw installation pointers
  • Electrical Connectors
    • Sealed Butt Connectors
    • Sealed Step-Down Butt Connectors
    • Sealed Ring Terminals
    • Sealed Slip-On Quick Disconnects
    • Cable Ties
  • BULK Pricing
    • Metric Bulk B2B pricing
      • Socket Screws
      • Hex Cap / Hex Flange Bolts
      • Machine Screws
      • Screws for Plastic (30° PT & 45° Plastite)
      • Thread-Forming screws
      • Nuts
      • Washers
    • US / Inch Bulk B2B pricing
      • Socket Screws
      • Machine Screws
      • Hex Cap / Hex Flange Bolts
      • Carriage Bolts
      • Hex Lag Screws / Lag Bolts
      • Sheet Metal / TEK screws
      • Drywall / Framing Screws
      • Nuts
      • Washers
      • Anchor for Concrete & Drywall
      • L9 Extreme Strength Fasteners
      • Thread-Cutting Screws (Type 1, 23, 25, Type F)
      • Thread-Rolling (Taptite)
      • Thread-Forming Screws (PT, EJOT)
      • Made in USA Fasteners
  • Contact Us / Fastener Info.
    • Fastener Info
    • Fastener Related Blog
    • Contact Monster Bolts

Monster Bolts - Fastener news

Metric Bolt grade markings

Metric Bolt Grades — 12.9 vs 10.9 vs 8.8 (Plus A2-70, A4-80)

Metric Fasteners 101Nov 05, 2019
Metric bolt “classes” describe minimum strength. The first number (~tensile strength/10) and the decimal (~yield ratio) tell you a lot. Example: ...

We've been in business since 2012 with well over 150,000 positive feedback (99.9% positive) on eBay alone. TrustPilot 4.9 out of 5 rating for Monster Bolts (as of 3/22/24)!

8124 Opportunity Drive, Milton FL 32583

Country/region
Country/region

© 2025 Monster Bolts
Powered by Shopify

Follow Us

We Accept

Amazon American Express Apple Pay Diners Club Discover Google Pay Mastercard PayPal Shop Pay Visa

© 2025 Monster Bolts
Powered by Shopify

  • Opens in a new window.