- Butterfly Anchor / Toggle Bolt 19
- Cement Board Screw 16
- Chipboard Screw 26
- Coach / Lag Screw 25
- Collated Screw 18
- Composite Screw 16
- Concrete Frame Screw 18
- Concrete Screw 24
- Deck Screw 20
- Distance Screw 12
- Drywall Screw 25
- Farmer / Roofing Screw 23
- Insulation Fixing 14
- Plastic Plug / Plug Anchor 20
- Sandwich Panel Screw 13
- Self Drilling Screw 35
- Self Tapping Screw 41
- Window Screw 21
- Wood Screw 22
- 12 Point Bolt 25
- Bent Bolt 38
- Carriage / Step Bolt 27
- Chicago Screw / Sex Bolt 17
- Double End Screw 20
- Flange Bolt 26
- Grub / Set Screw 28
- Hex Bolt 39
- Lock Bolt 17
- Machine Screw 42
- Penta / Square Head Bolt 21
- Pipe / Screw Plug 26
- Plow Bolt 17
- Railway / Track Bolt 16
- Shoulder Bolt 27
- Socket Screw 45
- T Bolt 21
- Thread Forming Screw 35
- Torque Shear / TC Bolt 22
- Acorn / Cap / Dome Nut 20
- Assembly / Keps Nut 19
- Cage Nut 17
- Castle / Slotted Nut 22
- Channel / Strut Nut 17
- Coupling Nut 15
- Flange Nut 20
- G / J / U Nut 18
- Hex Nut 27
- Jam / Thin Nut 20
- Knurled Nut 18
- Lug / Wheel Nut 19
- Nyloc / Lock Nut 31
- Panel Nut 15
- Push Nut 17
- Round Nut 16
- Square Nut 20
- T / Tee Nut 18
- Weld Nut 24
- Beveled / Taper Washer 18
- Bonded / Sealing Washer 17
- Circlip / Retaining Ring 26
- Conical Washer / Disc Spring 22
- Cup Washer 16
- Curved / Saddle Washer 15
- DTI / Load Indicating Washer 13
- E-Clip 16
- Flat Washer 37
- O-Ring 30
- Serrated Washer 17
- Shim 18
- Spring / Split Washer 24
- Square Washer 19
- Structural Washer 13
- Tab Washer 15
- Tooth Lock Washer 20
- Wave Washer 18
- Wedge Lock Washer 18
- Alloy / Superalloy 17
- Aluminum 11
- Brass / Copper 9
- Carbon Steel 20
- Stainless Steel 24
- Titanium 12
- Cable Tie 26
- Clamp / Clip 45
- Nail 31
- Push / Tree Retainer 14
- SEMS 27
- Staple 24
- Thumb Screw 17
- Type U Hammer Drive Screw 15
- Wing Nut 19
- Wing Screw 14
- Chain / Link 15
- Eye Bolt / Screw 19
- Eye Nut 13
- Hook 15
- Pulley 11
- Shackle 15
- Swivel 12
- Thimble 13
- Turnbuckle 15
- Wire Rope 15
- Drill Bit / Tap 23
- Hand Tool 26
- Hex Key / Wrench 27
- Power Tool 29
- Screw Cap 16
- Screw Driver / Driver Bit 24
- Welder 11
Fastener Microstructure Analysis via Metallography
Metallography — the microscopic examination of a material’s internal structure — is one of the most direct ways to verify that a fastener’s heat treatment actually produced the microstructure its strength grade depends on. For [...]
Pitch Diameter, Major/Minor Diameter & Tolerance Classes
1. The Three Controlling Diameters Every screw thread is defined by three diameters, and each plays a different role in whether a thread assembles and functions correctly: DiameterExternal thread (bolt)Internal thread (nut)MajorOutside diameter of the [...]
Thread Gauging Methods: A Comparison
Screw thread acceptance can be checked three fundamentally different ways — by functional pass/fail attribute gauging, by optical profile comparison, or by full dimensional/geometric measurement on a CMM. Each answers a different question, and most [...]
Understanding Preload: Why Bolt Tension Matters More Than Torque
The Core Misunderstanding Ask most people outside structural and mechanical design what makes a bolted joint hold, and the answer is almost always torque. Torque specs are printed on service manuals, stamped into assembly procedures, [...]
Case Studies: Famous Fastener-Related Engineering Failures
Why These Cases Matter Fastener failures rarely make headlines as fastener failures. The public record remembers a bridge collapse, a plane crash, or a sinking ship; the investigation afterward often finds a single pin, rivet, [...]
Total Cost of Ownership in Fastener Procurement
Executive Summary Fasteners — bolts, nuts, screws, washers, rivets, and related hardware — are the smallest and cheapest line items on most bills of material. They are also, almost universally, classified as "Class C" items [...]