Bulk Buying Screws, Nuts & Bolts: A B2B Purchasing Checklist
Bulk fastener purchasing works best when every line item is specified clearly enough that buyer and supplier are describing the sa...
27 Aug 2026 6 min read
screwnet Knowledge Base
Fastener Technical Guides & Articles
In-depth engineering resources, screw selection charts, bolt grade comparisons, and installation best practices.
All Guides (30)Fastener Basics (2)Material Science (5)Technical Specs (7)Bolts & Nuts (4)Anchors & Concrete (3)Roofing & Construction (1)Woodworking (3)
Fasteners for Sheet Metal & Fabrication: What to Choose
Sheet-metal fabrication can use machine screws with nuts, captive threads, inserts, studs and other engineered fastening methods. ...
27 Aug 2026 6 min read
Fasteners for Electronics Enclosures: M2, M3 & M4 Selection Guide
Electronics enclosures often use small metric fasteners that must be assembled repeatedly without damaging thin panels, inserts or...
27 Aug 2026 6 min read
How to Choose Fasteners for Outdoor & Corrosive Environments
Outdoor fastener selection is not simply a choice between steel and stainless. Rain, humidity, industrial pollution, coastal chlor...
27 Aug 2026 6 min read
Metric Fastener Torque Guide: Why One Torque Value Is Not Enough
Torque is commonly used as an indirect way to create preload, but one torque number is not correct for every fastener of the same ...
27 Aug 2026 6 min read
How to Prevent Screws, Bolts & Nuts from Loosening
Threaded joints can lose clamp force or rotate loose because of vibration, transverse movement, settlement, temperature cycling, i...
27 Aug 2026 6 min read
How to Measure Screws and Bolts Correctly
Correct measurement is the quickest way to avoid ordering the wrong replacement fastener. A useful identification includes nominal...
27 Aug 2026 6 min read
Bolt Strength Grades 8.8, 10.9 & 12.9 Explained
Metric steel fasteners are often marked with property classes such as 8.8, 10.9 and 12.9. These markings describe mechanical-prope...
27 Aug 2026 6 min read
Flanged Combination Head Screws: Phillips + Slotted Drive Guide
Flanged combination head screws pair a broad integral bearing surface with a drive that can accept more than one common tool style...
27 Aug 2026 6 min read
Slotted Cheese Head Screws: Uses, Advantages & Selection Guide
Slotted cheese head screws combine a cylindrical machine-screw head with a simple straight-slot drive. They remain useful in instr...
27 Aug 2026 6 min read
Phillips Pan Head Machine Screws: Complete Selection Guide
Phillips pan head machine screws are a familiar choice for electronics, covers, enclosures and light mechanical assemblies. The pa...
27 Aug 2026 6 min read
Torx Countersunk Screws Guide: Benefits, Uses & Selection
Torx countersunk screws combine a flush countersunk head with a six-lobe star drive. The result is a fastener that can sit neatly ...
27 Aug 2026 6 min read
Countersunk Screws Guide: Flush Fastening, Angles & Measurement
Countersunk screws are designed to seat into a conical recess so the top of the head can finish flush with, or below, the surround...
27 Aug 2026 6 min read
Socket Head Cap Screws Guide: Allen Screws for Machinery
Socket head cap screws combine a cylindrical head with an internal hex drive. The geometry allows high tool engagement from the to...
27 Aug 2026 6 min read
Eye Bolts Guide: Sizes, Uses & Safety Considerations
Eye bolts have a ring-shaped head that creates an attachment point for hooks, rope, cable or other hardware. They are used in ever...
27 Aug 2026 6 min read
Brass Threaded Inserts Guide for Plastic Parts & 3D Prints
Brass threaded inserts create a durable female metal thread inside a softer parent material such as thermoplastic. They are widely...
27 Aug 2026 6 min read
Grub Screws Guide: Set Screw Types, Uses & Selection Tips
Grub screws, also called set screws, are headless threaded fasteners used to secure one component relative to another. A common ex...
27 Aug 2026 6 min read
Plain Washers Guide: Why, When & How to Use Flat Washers
A plain washer looks simple, but it can change how a bolted joint bears on the clamped material. Placed under a bolt head or nut, ...
27 Aug 2026 6 min read
Dome Nuts Guide: Acorn Nut Uses, Sizes & Material Choices
Dome nuts, also called acorn nuts or cap nuts, cover the exposed end of a bolt or stud with a closed rounded top. The closed form ...
27 Aug 2026 6 min read
Nyloc Nuts Guide: How Nylon Insert Lock Nuts Work
Nyloc nuts are prevailing-torque lock nuts that use a non-metallic insert near the top of the nut. As the bolt thread passes throu...
27 Aug 2026 6 min read
Hex Nuts Guide: Metric Sizes, Threads & Stainless Steel Options
Hex nuts provide one of the simplest reusable ways to clamp parts with a bolt or threaded stud. The six flats are easy to grip wit...
27 Aug 2026 6 min read
Hex Bolts Guide: Sizes, Materials, Threads & Selection
Hex bolts are among the most familiar mechanical fasteners because the external hex head is easy to grip with a spanner or socket....
27 Aug 2026 6 min read
Black Oxide vs Zinc Plated Fasteners: Finish, Corrosion & Use
Black oxide and zinc plating are two very different ways to finish steel fasteners. Black oxide creates a dark conversion finish w...
27 Aug 2026 6 min read
Stainless Steel Fastener Corrosion Guide: Pitting, Crevice & Galvanic Risks
Stainless fasteners resist corrosion because chromium in the alloy forms a passive surface film, but that does not mean every stai...
27 Aug 2026 6 min read
SS304 vs SS316 Fasteners: Which Stainless Steel Should You Choose?
SS304 and SS316 are both widely used austenitic stainless steels, but they are not interchangeable in every environment. 304 is a ...
27 Aug 2026 6 min read
Countersunk vs Pan Head vs Socket Head Screws: Key Differences
Screw head geometry determines how the fastener sits against the joint, how much space it occupies and which tools can reach it. C...
27 Aug 2026 6 min read
Allen vs Torx vs Phillips vs Slotted: Which Screw Drive Is Best?
The drive is the interface between a screw and the tool used to install it. Allen, Torx, Phillips and slotted drives can all be fo...
27 Aug 2026 6 min read
Metric Thread Pitch Guide: M2 to M20 Coarse Threads
Thread pitch is one of the easiest fastener details to overlook because many everyday metric screws use the standard coarse series...
27 Aug 2026 6 min read
How to Read Metric Screw Sizes: M3, M4, M5 & M6 Explained
Labels such as M3×8, M4×12 and M6×20 tell you much more than a random stock code. The first number identifies the nominal metric t...
27 Aug 2026 6 min read
Types of Screws, Nuts & Bolts: Complete Fastener Guide
Fasteners look simple until a project requires the right combination of thread size, length, head style, drive, material and finis...
27 Aug 2026 6 min read