Technical Resource Center

Aerospace & Mil-Spec Fasteners

• Aerospace & Mil-Spec Fastener Sourcing — MS, NAS, and AN hardware sourced through authorized distribution with certified secondary processing, lot traceability, and complete cert packages
• MS, NAS & AN Fastener Numbering Systems Explained — decode part numbers across all three standards families, with AN bolt thread tables, washer dimensions, and the AN-to-MS supersession story
• What’s in a Mil-Spec Fastener Certification Package — C of C, material test reports, processing certs, DFARS flow-downs, lot traceability, and common rejection reasons
• DFARS-Compliant Fasteners Explained — the specialty metals clause, domestic melt, qualifying countries, and how to state DFARS requirements on an RFQ
• Mil-Spec Coatings & Finishes for Fasteners — black oxide, cadmium, zinc-nickel, dry film lube, and passivation compared, with hydrogen embrittlement guidance
• Self-Locking Aerospace Fasteners — jet nuts, K1000-style nut plates, all-metal vs nylon-insert locking nuts, thread-locking elements, temperature limits, and reuse guidance

Weld Stud Guides

• Weld Stud Selection Guide — all stud types, drawn arc vs. CD process selection, materials, sizing fundamentals, and application overview
• Headed Concrete Anchors & Shear Connectors Selection Guide — shear transfer in composite construction, diameter and length selection, AWS D1.1 and ACI 318
• Threaded Weld Studs Selection Guide — pitch diameter vs. full thread vs. collar studs, CD vs. drawn arc by diameter, thread specs, embed plate applications
• Deformed Bar Anchors Selection Guide — DBA for precast concrete and tilt-up construction, how deformed surface bond differs from HCA head bearing
• Weld Stud Ferrule Sizing Chart — matched ceramic ferrule sizes for every drawn arc stud diameter
• Weld Stud Load Capacities & Engineering Reference — AWS D1.1 and AISC 360 design shear values, deck reduction factors, ACI 318 tension breakout tables
• Nelson Weld Stud Cross-Reference — Cox Industries and Bluearc equivalents for Nelson H4L HCA studs and shear connectors, 1/4" through 1" diameter

Concrete Anchors

• Concrete Anchor Selection Guide — choosing between wedge, sleeve, screw, drop-in, and epoxy anchors
• Wedge Anchor Selection & Installation Guide — sizing, embedment, torque, materials, and step-by-step install for the Simpson Strong-Bolt 2
• Wedge Anchor Pull-Out Strength & Load Tables — tension and shear design values, edge distance effects, combined loading, and sample calculations
• Wedge Anchor Material & Finish Selection Guide — zinc, mechanically galvanized, 304 and 316 stainless — pick the right finish for your environment
• How to Remove a Wedge Anchor — cut flush, drive below surface, drill out, and patch — removal and replacement methods
• Wedge Anchor vs Sleeve Anchor Comparison — substrate, load, install, removability, and code listing — when to use each
• Sleeve Anchor Selection & Installation Guide — head styles, load tables, masonry data, and installation steps
• How to Install Toggle Bolts — complete hollow-wall anchor installation guide with weight capacity tables, sizing chart, base material guidance, and removal instructions
• Toggle Bolt Drill Bit & Hole Size Chart — complete drill bit reference for wing toggles, snap toggles (Toggler-style), and plastic toggles in all standard sizes
• Molly Bolt vs Toggle Bolt — side-by-side comparison of the two main hollow-wall anchor types, capacity ranges, removability, and decision matrix
• Concrete Anchor Drill Bit & Hole Size Chart — drill, embedment, torque, and minimum concrete thickness for every standard anchor diameter
• Masonry Drill Bit Selection Guide — SDS+, round shank, Tapcon pilot, Rebar Eater, A-taper, and spline bits explained, with an anchor-to-bit size chart

Rivet Nuts & Threaded Inserts

• Rivet Nut Selection Guide — choosing IKF vs ISR, materials, sizes, and grip ranges
• Rivet Nut Material Selection Guide — comparing steel, aluminum, and stainless with decision criteria
• Rivet Nut Drill Bit & Hole Size Chart — matched Triumph drill bits for every rivet nut size
• Rivet Nut Tool Selection Guide — choosing between hand, pneumatic, pneudraulic, and cordless installation tools
• Closed-End vs Open-End Rivet Nuts — sealed vs through-threaded; when to use each
• Hex Body vs Round Body Rivet Nuts — anti-rotation comparison and material grip considerations
• How to Install a Rivet Nut — step-by-step installation with common mistakes and verification
• Troubleshooting Rivet Nut Failures — spinning, pull-out, cross-threading, corrosion failure modes and fixes
• Rivet Nut Engineering Reference — performance characteristics, dimensional standards, torque values, design considerations
• Rivet Nut vs Plus Nut vs Jack Nut vs Well Nut — comparing rivet nuts to alternative blind threaded fasteners
• Rivet Nuts for Automotive Applications — bumpers, fender flares, light bars, skid plates, body panels
• Rivet Nuts for Sheet Metal Fabrication — enclosures, cabinets, HVAC, machine guards, production tooling
• Rivet Nuts for Marine and Outdoor Use — stainless selection, galvanic prevention, sealing for waterproof installations

Nuts & Thread Reference

• Types of Nuts: Complete Guide — hex, heavy hex, lock, jam, flange, castle, coupling, acme, weld, square, cap, wing, and more, with what each is for
• Hex Nut Size Chart & Dimensions — width across flats (wrench size) and thickness for inch and metric finished hex nuts, plus how heavy hex differs
• Hex High Nut Guide — what a high nut is, Grade 8 vs Grade 5 strength, SAE J482 dimensions and wrench sizes, and where high nuts are used
• Bolt & Nut Torque Chart — reference tightening torque for Grade 2, 5, and 8 coarse-thread fasteners, plus how lubrication, grade, and lock nuts affect torque
• Nut Grade & Bolt-Matching Guide — matching Grade 2/5/8/9, metric class 8/10, and A325/A490 structural bolts to the correct A563 or A194 nut
• Coarse vs Fine Thread Nuts — UNC vs UNF and metric coarse vs fine compared on strength, vibration resistance, and use, plus how to identify thread pitch
• How to Keep a Nut from Loosening — lock nuts, jam nuts, castle nuts and cotter pins, lock washers, serrated flange nuts, and thread locker compared
• Nylock vs Stover vs All-Metal Lock Nut — nylon-insert, all-metal prevailing-torque, serrated flange, K-lock, and jam nuts compared on temperature limit and reuse
• Castle Nut vs Slotted Nut vs Jam Nut — the crown difference, when a cotter pin is required, and which to choose for wheel bearings, machinery, and aircraft
• How to Install a Castle Nut with a Cotter Pin — torque, aligning the slot, seating wheel-bearing nuts, pin sizing, and common mistakes to avoid
• Coupling Nut & Threaded Rod Guide — joining and extending threaded rod, full engagement, the sight hole, reducing couplers, and material and grade selection
• Acme Nut & Lead Screw Guide — how the Acme thread works, finished vs heavy Acme hex nuts, bronze vs steel for lead screws, and sizing
• Nut Material Guide — zinc and plain steel, 18-8 and 316 stainless, silicon bronze, brass, aluminum, and nylon compared on corrosion, strength, and cost

Socket Screws & Shoulder Bolts

• Socket Screw Torque Chart & Hex Key Size Reference — torque values and hex key sizes for alloy and stainless SHCS in inch and metric, plus button head and set screw key size comparison
• Flat Head Socket Screw Countersink Guide — 82° inch (ASME B18.3) vs. 90° metric (DIN 7991) countersink angles, hole sizing tables, and length measurement convention
• Set Screw Point Style Selection Guide — cup, cone, flat, oval, dog point, and nylon tip — holding power, shaft damage, repositionability, and DIN standard reference
• Socket Screw Material & Grade Guide — alloy steel ASTM A574 vs. Grade 8, 18-8 vs. 316 stainless, metric property classes 10.9 and 12.9, finish options
• Shoulder Bolt Selection Guide — shoulder diameter, shoulder length, thread sizing, clearance hole tables, bearing fit tolerances, and pivot pin applications

Strut & Accessories

• Strut Channel Accessories Guide — channel nuts, beam clamps, pipe clamps, fittings, brackets, trolleys, and end caps explained, with a guide to choosing each
• Strut Beam Clamp Selection Guide — universal malleable, I-beam, C-clamp, and window/U-bolt types compared by flange thickness, rod size, and load
• Strut Brand Cross-Reference — Eugene Fastener equivalents for Unistrut, B-Line, PowerStrut, SuperStrut, Erico, PHD, and Haydon part numbers
• Strut Channel Nut & Spring Nut Guide — spring vs no-spring, short vs regular vs long spring by channel depth, thread size, finish, and brand cross-references
• Strut Finishes & Materials Guide — electro-galvanized, hot-dip galvanized, 316 stainless, and aluminum compared for indoor, outdoor, wet, and coastal use
• Strut Fitting Reference — flat plates, 90-degree angles, gussets, U, Z, and wing fittings explained, with brand cross-references
• Strut Pipe & Cushion Clamp Sizing Guide — EMT vs rigid vs copper vs OD clamp sizing, with conduit and tube outside-diameter reference tables
• How Much Weight Can Strut Hold? — span, channel size and gauge, single vs double channel, and support spacing, plus how to read a load table safely

Materials and Coatings

• Stainless Steel Selection Guide
• Mil-Spec Coatings & Finishes for Fasteners — black oxide, cadmium, zinc-nickel, dry film lube, and passivation for aerospace and defense hardware
• Marine Fastener Material Guide — silicon bronze vs 316 stainless vs brass for salt water, corrosion resistance, galvanic compatibility, and strength