Monster Bolts
Monster Bolts is your top choice for both metric nuts and US sizing. Shop now for a great selection of nuts and washers, screws, bolts, concrete anchors & more.
Browse by category
Collections
Pan Head Machine Screws
Pan Head Machine Screws (Inch) – Phillips Drive
Flat Head Socket Cap Screws (Inch) – 82° Countersink
Metric Flat Socket Cap Screws - Stainless & 12.9 Alloy
Button Head Socket Cap Screws - Stainless & 12.9 Alloy
Socket Head Cap Screws — Metric & Inch (Allen / Hex Drive)
Set / Grub Screws - Stainless & 45H Alloy Steel
Button Head Socket Cap Screws (Inch)
Socket Head Cap Screws - (Inch / Allen)
Socket Set Screws (Inch) – Cup Point
Inch - Nuts and Washers
Allen Wrenches / Hex Keys - Monster Bolts
Nuts and Locking Nuts
Best Selling Products
Newest Products
Phillips Flat Head Machine Screws
Metric Flat Head Socket Cap Screws - DIN 7991
Metric Socket Head Cap Screws - DIN 912
Metric Button Head Socket Cap Screws - ISO 7380
Metric Socket Set Screws (Cup Point) - DIN 916
Hex Bolts
Low Head Socket Cap - Stainless & 10.9 Alloy
Grade 5 Titanium Socket Screws
All Metric Nuts and Washers
Washers and Locking Washers
Inch - Drill Bits, Hex Keys and Driver Bits
Metric Hex Keys & Driver Bits
Hex Cap Screws / Tap Bolts (Inch) – Grade 8 & Stainless
Metric Hex Cap Screws – A2 Stainless M4–M10 & 10.9 Black Alloy (M6, M8)
Metric Phillips Pan Head Machine Screws – DIN 7985
Metric Phillips Flat Head Machine Screws – DIN 965
Metric Low Head Socket Cap Screws - DIN 7984
Low Head Socket Cap Screws (Inch)
Flat Washers
Split Lock Washers
Hex Nuts
Nylon Insert Locknuts
Flange Nuts
A4 (316) Marine Grade Stainless Steel, Screws, Nuts and Washers
Socket Screws — Allen / Hex Drive Fasteners (Inch, ASME B18.3)
Star / 6-Lobe Fasteners
Sheet Metal Screws (Inch) – Self-Drilling & Self-Tapping
Deck / Wood Screws
Screwdriver Bits
Monster Bolts Metric Fasteners – Screws, Bolts, Nuts, and Washers
Tek Screws | Hex-Washer Head Drill-Point Screws
Tek roofing Screws | Hex-Washer Head w EPDM Bonded sealing washer, Drill-Point Screws
Metric Hex Nuts - DIN 934
Metric Nylon Insert Lock Nuts (Nylock) – DIN 985
Metric Flat Washers – DIN 125A
Featured products
Popular right now
M3 Button Head Socket Cap screws, 12.9 Alloy Steel w/ Black
USD 1.42
Metric - Short Arm Hex / Allen Keys, 6150 Black Alloy Steel
USD 0.55
M4 Button Head Socket Cap screws, 12.9 Alloy Steel w/ Black
USD 1.52
M5 Button Head Socket Cap screws, 12.9 Alloy Steel w/ Black
USD 1.69
M6 Button Head Socket Cap screws, 12.9 Alloy Steel w/ Black
USD 1.43
M8 Button Head Socket Cap screws, 12.9 Alloy Steel w/ Black
USD 2.48
M10 Button Head Socket Cap screws, 12.9 Alloy Steel w/ Black
USD 5.46
M12 Button Head Socket Cap screws, 12.9 Alloy Steel with Bla
USD 9.94
Metric Flat Washer, Stainless Steel DIN 125A (125 A) 18-8 /
USD 0.58
Metric Nylon Insert Hex Lock Nuts - Stainless Steel DIN 985
USD 0.94
M3 Button Head Socket Cap screws, Stainless Steel A2 (18-8)
USD 0.79
M4 Button Head Socket Cap screws, Stainless Steel A2 (18-8)
USD 1.17
Metric Nylon Insert Hex Lock Nuts - DIN 985 Black Oxide Stee
USD 1.40
M3 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black O
USD 1.37
M4 Socket Head Cap screws, Class 12.9 Alloy Steel w/ Black O
USD 1.38
M3 Phillips Pan Head Machine screws, Steel w/ Black Oxide an
USD 0.98
M3 Socket Head Cap screws, Stainless Steel A2 (18-8)
USD 0.99
M4 Socket Head Cap screws, Stainless Steel A2 (18-8)
USD 1.48
M5 Button Head Socket Cap screws, Stainless Steel A2 (18-8)
USD 1.43
M6 Button Head Socket Cap screws, Stainless Steel A2 (18-8)
USD 1.80
M8 Button Head Socket Cap screws, Stainless Steel A2 (18-8)
USD 3.17
M10 Button Head Socket Cap screws, Stainless Steel A2 (18-8)
USD 6.09
Metric Hex Nuts, Stainless Steel DIN 934 A2 / 18-8
USD 0.65
Hex Serrated Flange Nuts, Zinc Plated Class 8 Alloy Steel Me
USD 0.85