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Stud Bolts & Threaded Rod

Studs and rod,
cut to length.

Fully-threaded studs, double-end studs, and threaded rod for flanged piping, hanger systems, anchorage, and machinery assembly. Carbon, alloy, stainless, and exotics — cut, chamfered, marked, and shipped.

A193
B7 / B16 / B8 / B8M
A320
Gr L7 — low temp
A194
2H / 7 / 8 / 8M nuts
MTR
Full lot traceability
A193 B7 · Double-end stud · Heavy hex
Double-end stud bolt and threaded rod
01

High-temperature

A193 B7 and B16 — heat-treated chrome-moly stud bolts for ASME flange and pressure-vessel service up to ~1100°F.

02

Low-temperature

A320 L7 and L43 are Charpy-tested at −150°F for cryogenic and cold-weather service — LNG, ammonia, refrigeration.

03

Cut to length

Threaded rod cut, deburred, and chamfered both ends — from short tap-end studs up through 12 ft anchor rod.

04

Coatings & finishes

Plain, hot-dip galvanized, mech zinc, PTFE / Xylan, cad. MTRs, PMI, and lot traceability furnished on request.

Studs hold the flange.
Rod runs the job.

Stud bolts and threaded rod are the long, fully-threaded fastener forms — used wherever a hex bolt would run out of grip length, where you need to grab a nut on each end, or where you'd rather buy stock and cut to size on the job.

The bulk of what we ship in this category is ASTM A193 stud bolts for flanged piping (B7, B8, B8M, B16) and threaded rod in everything from A36 mild steel up through 316 stainless. Both cut to length, chamfered, head-stamped, and matched with their nuts.Looking for foundation anchor rod with a hooked or headed end? See F1554 anchor bolts.

What we stock

Six product forms.
Cut to length.

Stocked in random and 12-foot lengths — cut, chamfered, marked, and shipped with matching nuts where the spec calls for them.

01 / Stud boltA193 B7 / B8 stud bolt

Flange stud bolts

Fully-threaded, chamfered both ends, marked per ASME B16.5. The default flange-bolt form for ASME pressure piping.

A193 B7 · B16 · B8 · B8M · A320 L7 · A453
02 / Double-endDouble-end stud with tap-end and nut-end

Double-end studs

Threaded ends with an unthreaded body — tap-end and nut-end variants for blind-tapped flanges, valve bonnets, and machinery joints.

A193 B7 · B16 · custom thread length
03 / Threaded rodContinuous fully threaded rod

Continuous threaded rod

12-foot stock rod, fully threaded, in carbon, alloy, and stainless. Cut to any length on saws or with our shear; chamfered ends.

A36 · B7 · B8 · F1554 · UNC, UNF, metric
04 / Acme rodAcme threaded rod with trapezoidal threads

Acme threaded rod

Trapezoidal-thread rod for jacks, screw conveyors, lead screws, vise spindles. Right-hand and left-hand thread, in C1018 and 304.

2G · 2C · 2E classes · 1/4″ – 4″
05 / Stud kitsStud bolt assembly kit with heavy hex nuts

Stud bolt assemblies

Joint-ready kits — studs, two A194 heavy hex nuts, and F436 washers per joint, bagged and banded by line item. Pull a flange off the trailer, grab a bag, make the joint.

A193 + A194 + F436 · per-joint bag · BOM-matched
06 / CNC machinedCustom CNC machined stud with reduced shank

Custom CNC machined

Specials cut to print on our in-house CNC — shoulder studs, stepped studs, drilled or cross-bored rod, custom thread reliefs, reduced shanks. Prototype runs to scheduled production.

To print · DFARS · Full certs · carbon, alloy, SS, exotics
Stud bolt vs threaded rod

What's the difference
between a stud and rod?

Same shape on the bench. Different intent on the drawing. The distinction shows up in the chamfer, the marking, the length tolerance, and how it ships.

Form A

Stud bolt

A finished, headstamped fastener cut to a specific bolt length for a specific joint — most often a flanged piping connection sized per ASME B16.5.

  • LengthCut to drawing or B16.5 length, typically with a tight tolerance.
  • EndsBoth ends chamfered to the first full thread; nuts run on smoothly.
  • MarkingHeadstamp on at least one end identifying grade and manufacturer.
  • ShipsAs a bolt — typically with two heavy hex nuts (A194) per stud.
  • Spec'd byASTM A193, A320, A453 + ASME B16.5 length tables.
Form B

Threaded rod

Continuous threaded stock — bought by the stick, cut on the job. The right form when the user is going to grab a length and trim it to fit.

  • LengthStock 12 ft (carbon) and 6 ft (stainless); cut to any length on demand.
  • EndsStock saw-cut; we chamfer both ends on cut-to-length pieces.
  • MarkingColor band or paint mark on the cut piece per the order; not headstamped.
  • ShipsLoose, banded, or with matched nuts on request.
  • Spec'd byA307, A36, F1554, A193 (cl. 2A/2B), ASME B1.1 / B1.13M.
Inventory & availability

Stocked, cut, and
ready to ship.

We keep an active inventory of stud bolts, threaded rod, and matching A194 nuts in the sizes and grades the petrochemical, power, and structural markets call out most. Cuts, finishes, and assemblies turn around quickly — most orders ship same week.

Where these get used

Three places these show up most.

Most of our stud and rod work falls into one of three areas. Tell us the industry and the line item, and we'll pull the right grade, finish, and length.

Industrial process plant with bolted flanged piping
Cut, chamfer, mark

Send the BOM.
We'll handle the rest.

Most of what ships out of this category is cut to length on our saws. Cut, deburred, chamfered both ends, color-banded by lot, and packaged with the matching nuts.

  • Length tolerance±1/16″ standard, tighter on request. ASME B16.5 stud lengths held to spec.
  • End prepBoth ends chamfered to first full thread. Square-cut on rod stock by request.
  • MarkingHeadstamp on stud bolts; paint band or color code on cut rod.
  • Nut setsTwo A194 heavy hex nuts per stud, matched to grade and finish. F436 / F844 washers on request.
  • PackagingBagged by line item, kits per joint, or bulk to drum — your call.
Send your BOM
Coatings & finishes

The finish matters
more than the bolt.

For a stud, the coating is half the spec. PTFE / Xylan resists thread galling and seizing; HDG buys you years of outdoor service; cad and zinc are general-purpose. Pick the wrong one and the next maintenance crew can't get the joint apart.

Documentation

What ships with the studs.

Pressure-piping studs ship to a paper trail the inspector and code-stamp shop expect to see. Standard with every order where the spec calls for it.

01

Material Test Reports

MTRs / Mill Test Certificates tied to the heat and lot on every shipment. Mechanical & chemistry per A193 / A320 / F593.

02

Hardness & tensile

Lot-by-lot hardness (HRC, HBW) and tensile data on alloy and Q&T grades. Charpy impact data on A320 grades.

03

PMI on request

Positive Material Identification by XRF or OES, ordered per-lot when your QA program calls for it. Common on B7 / B8M flange jobs.

04

NACE / sour service

Hardness-controlled studs (B7M, L7M) when the project spec calls for them — flag it on the RFQ.

05

DFARS / Buy America

Domestic-melt / domestic-pour material with full documentation. Common on defense, AASHTO bridge, and Caltrans work.

Looking for something
a little different?

Stud Bolts & Threaded Rod is the long-form, cut-to-length world. If your project lives one step over, start here instead.

Request a quote

Send the BOM.
We'll handle the rest.

Send the line list, the flange schedule, or just diameters and lengths. A bolt specialist will come back with a quote, usually inside 24 hours.

Prefer to talk it through?707.741.3277info@californiafastener.com
Talk to a bolt specialist

Cut, chamfered,
and on the truck.

From a single B7 stud cut to length to a full flange package with PTFE and PMI — we've shipped the package before.