Socket head, heavy hex, and the nuts and washers that go with them. Carbon, alloy, and stainless grades — stocked deep, shipped same day, and backed with full MTRs.
Carbon, alloy, and stainless across A307, SAE J429, A449, A193 B7/B16/B8/B8M, A574, F593 — the bolts you spec on most drawings.
A194 heavy hex nuts and F436 hardened washers paired to the bolt grade. Ship as kits, tagged by heat and lot.
Inconel, Monel, Hastelloy, 17-4 PH, 2205 / 2507 duplex, and titanium when the spec calls for more than standard stainless.
Heat and lot traceability with every order. DFARS and PMI documentation when your QA program requires it.
Industrial Fasteners is our catch-all for the mechanical and process assembly hardware that runs through almost every project we quote — socket head cap screws, heavy hex bolts, heavy hex nuts, hardened washers, set screws, and the specs that back them.
If you're specifying for pressure vessels, flanged piping, rotating equipment, machinery builds, or general structural assembly — this is the category.Looking for anchor bolts, structural bolts, or stud bolts as a standalone? See the cross-links below.
Stocked deep in the grades you actually call out — metric and inch, plain and coated, standard and heavy pattern.
High-strength machine screws for precision assembly — tight head clearance and torque control. Metric and inch.
Flush-mount screws for surfaces that need to stay smooth. Countersunk 82° (inch) or 90° (metric). Alloy and stainless.
Heavier-pattern hex head bolts for flanged, bolted, and high-load assemblies. Galvanized, plain, PTFE, and Xylan coatings available.
Thicker, higher-strength nuts matched to heavy hex bolts and stud assemblies. Specified to pair with their mating bolt grade.
Through-hardened flat washers for high-strength bolted joints. Type 1 plain, Type 3 weathering — sized for A193 stud and A574 SHCS assemblies.
Shaft and collar positioning screws in cup, cone, flat, dog, and oval points. Metric and inch.
Industrial fasteners cover a wide range of service conditions. Below is how we organize the specs we work in most often — if your drawing calls out a grade not listed, ask. Most of what you'd pull from a standard isn't far from what we stock or can bring in.
General-purpose and machinery-grade bolts. Inch-series workhorses through SAE J429 and ASTM A307 / A449.
Low-carbon steel bolts for general-purpose assembly. Grade A for non-critical applications; Grade B for flanged joints at moderate loads and limited temperature.
Inch-series hex cap screws. Grade 2 for light-duty, Grade 5 medium-carbon for general machinery, Grade 8 alloy steel quenched and tempered for higher-tensile assemblies.
Quenched and tempered hex bolts with properties similar to SAE Grade 5, extended to larger diameters (up to 3″) not covered by J429. Common in heavy equipment and machinery.
Chromium-moly (and chromium-moly-vanadium) alloys for pressure vessels, flanged piping, and high-temperature, high-pressure service.
Chromium-molybdenum (4140/4142) alloy steel, quenched and tempered. The workhorse stud and bolt for pressure vessels, flanged piping, and high-temperature, high-pressure service. Refineries, power plants, petrochemical.
Chromium-moly-vanadium alloy, quenched and tempered. Runs above B7's service range — superheated steam piping, high-temperature turbine connections, service up to approximately 1100°F.
304 and 316 austenitic grades plus strain-hardened classes — food, pharma, chemical, marine, pulp & paper, wastewater.
B8 is 304 stainless for general corrosion service — food, pharmaceutical, chemical at moderate temperatures. B8M upgrades to 316 for chloride and acid resistance — marine, chemical processing, pulp & paper, wastewater. Class 2 is strain-hardened for higher strength at smaller diameters.
Stainless steel bolts, screws, and studs in 18-8 (304/305), 316, and strain-hardened alloys. Covers non-pressure service where A193 isn't required.
Match the nut and washer to the bolt grade — pressure-piping and high-strength joints don't tolerate mismatched companion hardware. Here's what we stock to pair with the families above.
A193 B7 · Heavy hex
F436 · Hardened washerA194 2H · Heavy hex nut
When your application needs more than standard carbon or stainless, we source and — where needed — machine to print.
Every industrial fastener we ship is traceable to heat and lot. Standard with every order where the spec calls for it — and if your QA program needs something we haven't listed, ask. Most documentation asks we get are ones we've answered before.
MTRs / Mill Test Certificates tied to the heat and lot on every shipment where the spec requires.
Signed C of C confirming the parts were manufactured and tested to the called-out standards.
Domestic-melt / domestic-pour options for defense work — flag it on the RFQ and we'll source accordingly.
First Article Inspection for new programs — dimensional verification and material certs in one package.
Positive Material Identification with XRF or OES, ordered per-lot when your program calls for it.
Industrial Fasteners is a catch-all. If your project lives in one of these more specific worlds, start there instead.
Send the drawing, the spec callouts, or just a rough description of the job. A bolt specialist will come back with a quote, usually inside 24 hours.
From a single heavy hex to a full bolted joint kit with MTRs, First Article, and PMI — we've shipped the package before.