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.
Monster Bolts
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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

Metric Flat Washer, Stainless Steel DIN 125A (125 A) 18-8 /
USD 0.58

SAE Flat Washers, Steel with Black Oxide, US / Inch
USD 0.47

US / Inch - Stainless Steel Flat Washers, 18-8
USD 0.51

DIN 125A Metric Flat Washers, 200 HV Plain Steel (125 A)
USD 0.49

Marine Grade Stainless Steel Flat Washer, A4 (316) - DIN 125
USD 0.62

Metric Split Lock Washers - Stainless Steel DIN 127B 18-8 /
USD 0.61
Metric Fender Washer - Stainless Steel DIN 9021, 18-8 / A2
USD 0.59

Metric Steel Split Lock Washers with Black Ox DIN 127B
USD 0.66

Marine Grade Stainless Steel Fender Washers, A4 (316) - Metr
USD 0.69

U.S. / Inch - Stainless Steel Split Lock Washers - A2 / 18-8
USD 0.58

DIN 125A Metric Flat Washers, 200 HV Steel Zinc Plated Cr+3
USD 0.48

Marine Grade Stainless Steel Split Lock Washers, A4 (316) -
USD 0.63

US / Inch - F436 Structural Flat Washers, Zinc-Yellow Plated
USD 0.74

SAE Flat Washers, Cr+3 Zinc Plated Steel, US / Inch
USD 0.49

Thick Flat Washers, DIN 7349 Low Carbon Steel Zinc Plated Cr
USD 0.63

US / Inch - Stainless Steel Fender Washers, 18-8 (304) - 1/4
USD 1.47

Medium Split Lock Washers, Steel with Black Oxide, US / Inch
USD 0.66

US / Inch - Fender Washers, Cr+3 Zinc Plated Steel - #10 (3/
USD 0.86

U.S. / Inch - Split Lock Washers Grade 8 Thru Hardened Alloy
USD 0.62

Metric Fender Washer - Zinc Plated Steel DIN 9021, Grade A
USD 0.58

#14 Zinc HWH w/ EPDM Sealing Washer, Self-Drilling TEK Roofi
USD 13.95

#14 Zinc Self-Drilling Tek Screws, Hex Washer Head
USD 8.94

#10 Hardened Stainless Steel HWH w/ EPDM Sealing Washer, Sel
USD 21.1

#14 Hardened Stainless Steel Self-Drilling Tek Screws, Hex W
USD 23.9