Small MOQ — From 1 Piece
Fastener Kits, Built to Your Specs.
Explore standard screw, nut, and washer kits, or request a custom assortment. Tell us the sizes, materials, and quantities you need. We’ll confirm availability and provide a quote.
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Screws, nuts, washers, and custom CNC parts — then filter the catalog by size and material.
Custom CNC Machined Parts
Made to your specifications — send us your drawings or samples. Custom fasteners and hardware components in stainless steel, titanium, copper and other materials. Single-piece orders welcome.
Ordering & Customization
Made to Your Specifications
Share your drawing or part requirements.
Single-Piece CNC Orders
Request a quote for one custom-machined part.
Bulk Quote Requests
For bulk fastener pricing, include the applicable standard, size, and quantity.
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Standard kits and fastener ranges, ready to quote
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Machine Screws
304 Stainless Steel Phillips Pan Head Machine Screw - M6 × 75
Phillips pan head machine screw in 304 stainless steel, with a chamfered head edge. Thread diameter M6, thread pitch 1mm, thread length 74.5–75.1mm, head diameter 12.3–12.6mm, head thickness 2.7–2.9mm. Measurements from one batch are for reference only. Small MOQ — orders start from just 1 piece. To request a quote, send us the kit reference or a product photo, the quantity you need, and your delivery country.
Hex Socket Screws & Bolts
304 Stainless Steel Socket Head Cap Screw - M4 × 50
Socket head cap screw in 304 stainless steel (A2-70), with a hex socket drive. Thread size M4, length under head 50mm, head height 3.82–4.00mm, head diameter 6.78–7.22mm, hex socket across flats 3.02–3.08mm. Measurements from one batch are for reference only. Small MOQ — orders start from just 1 piece. To request a quote, send us the kit reference or a product photo, the quantity you need, and your delivery country.
Screw, Nut & Washer Assortment Kits
KM Cross Countersunk Head Machine Screw, Nut & Washer Box Kit
Cross countersunk head machine screws with matching nuts and flat washers in a compartment box kit. Type A: 10 cells; Section B: 15 cells; Kit C: 24 cells. Includes M2, M3 and M4 screws in assorted lengths with matching nuts and washers. M stands for diameter and * for length (mm). Small MOQ — orders start from just 1 piece. To request a quote, send us the kit reference or a product photo, the quantity you need, and your delivery country.
Screw, Nut & Washer Assortment Kits
PM Cross Round Head Machine Screw, Nut & Washer Box Kit
Cross round head machine screws with matching nuts and flat washers in a compartment box kit. Kit A: 10 cells; Kit B: 15 cells; Kit C: 24 cells. Includes M2, M3 and M4 screws in assorted lengths with matching nuts and washers. M stands for diameter and * for length (mm). Small MOQ — orders start from just 1 piece. To request a quote, send us the kit reference or a product photo, the quantity you need, and your delivery country.
Screw, Nut & Washer Assortment Kits
PWM Boxed Machine Screws with Nuts & Washers
PWM machine screws with built-in washers, nuts and flat washers in a compartment box kit. Kit A: 10 cells; Kit B: 15 cells; Kit C: 24 cells. Covers M2, M3 and M4 sizes — one box for hand DIY and repair work. M stands for diameter and * for length (mm). Small MOQ — orders start from just 1 piece. To request a quote, send us the kit reference or a product photo, the quantity you need, and your delivery country.
Self-Tapping Screws
PWA Nickel-Plated Self-Tapping Screws with Washers Assortment Kit
Nickel-plated self-tapping screws with washers in an assortment kit, supplied in a compartment storage box. Kit A: 10 cells; Kit B: 15 cells; Kit C: 24 cells. Sizes include M2, M3 and M4 screws in assorted lengths as shown in the pictures. Small MOQ — orders start from just 1 piece. To request a quote, send us the kit reference or a product photo, the quantity you need, and your delivery country.
What to Include in Your RFQ
For fasteners, include the applicable standard, size, thread, grade, finish, and quantity. For custom CNC parts, attach a drawing and specify any critical tolerances.
Stories and guides
Buying guides and notes from Boltriver
Fastener materials, sizing, and how to request a quote.
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Featured storyBuying Guides
How to Measure a Screw: Diameter, Length and Thread Pitch Explained
M6 × 1.0 × 20 — what do the numbers mean? How to measure screw diameter, length and thread pitch with calipers or a ruler, with a metric pitch chart.
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Buying Guides
How to Choose a Screw Assortment Kit: A Buyer's Guide for Retailers, Distributors and Repair Shops
Buying screw assortment kits for resale or workshop use? Check size coverage, contents, materials, the case and restocking before you order — a practical guide from Boltriver.
Buying Guides
How to Request a Quote for Custom Screws
Request a custom screw quote with a simple checklist covering drawings, dimensions, material, finish, quantity, and delivery.
Buyer questions
Questions buyers ask before they place the order
Find quick answers about lead times, custom CNC parts, and bulk quotes.
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