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Manufactured In-House

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Heat Exchanger, Boiler & Condenser Tube Plugs

Shoulder Plugs
Header | Hex | UNF Plugs for Fin-Fans®

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Technical Data Sheet

Shoulder Plug
(Header Plug | Hex Plug)

DS-SP-HP-001 Rev. Current

Plug Sizes

3/4" – 2-1/8"For 5/8" – 2" Tube O.D.

Length Under Head

3/4" – 3"

Fast Delivery

Same-DayStock items · TX & LA local

Custom Options

AvailableNon-standard sizes & alloys

Specification	Details
Materials	Carbon Steel • 316 Stainless Steel • Custom alloys & coatings
Installation	Threaded design fits header plug sheets
Plug Sizes	3/4" – 2-1/8" (for 5/8" – 2" Tube O.D.)
Length Under Head	3/4" – 3"

Easy Installation Threaded design fits header plug sheets for quick, reliable installation

Maintenance-Friendly Allows access for inspection, cleaning, and tube plugging

Durable & Safe Handles high pressure and temperature; prevents leaks

Industries & Applications

Oil & Gas Refineries Petrochemical Power Plants Air-Cooled Heat Exchangers

Shoulder Plug
Description

Shoulder Plug
Sizing Chart

Product Overview

Shoulder Plugs

Header Plugs | HEX Plugs — Fin-Fan® Heat Exchangers

USA Industries is the preferred supplier for many of the world's largest power plants, refineries, and chemical facilities for header plugs / hex plugs. Threaded plugs specifically designed for use in Fin-Fan® air-cooled heat exchangers — extracting heat from process fluids by transferring it to the surrounding air.

Metals

Manufactured in nearly any metal combination — carbon steel, stainless steel, copper, and brass as standard, with additional alloys available.

Coatings

Available in cadmium, electroless nickel, galvanized, nickel, zinc, or uncoated — to match your application and environment.

Production

Capacity to manufacture over 1,000 header plugs per day — maintaining high quality and adhering to your precise specifications.

Availability

In-stock plugs and gaskets ship same day — 24/7 shipping available. Order plugs and gaskets together and save.

Built for Industrial Turnarounds

For the world's largest industrial facilities, halting a shutdown for a small heat exchanger part is not an option. Our rapid production and same-day shipping ensure your turnaround stays on schedule — no matter the quantity or specification required.

Also Known As

Shoulder Plugs· UNF Plugs· Fin-Fan Plugs· Heat Exchanger Header Plugs

Fin-Fan® is a registered trademark of Hudson Products Corporation.

⚠ Warning: Never stand in front of an installed plug under pressure. Plugs ejected under pressure can cause serious bodily injury.

12 sizes

Minimum Torque Values for AISI 1008 Material - Consult Factory for Other Material Values
Base Dimensions					Flat Gasket		EZ Torque® Gasket
Tube O.D.	"A" Plug Thread O.D.click to highlight	UNF Threadclick to highlight	"B" Length Under Headclick to highlight	Hex Sizeclick to highlight	Stock #click to highlight	Torque Ft/Lbsclick to highlight	Stock #click to highlight	Torque Ft/Lbsclick to highlight

Material Codes — substitute <> suffix in stock numbers

C Carbon Steel

B Brass

S 316 SS

J 70/30 CuNi

K 90/10 CuNi

Y Chrome/Moly

M Monel

I Inconel

N Nickel 200

T Titanium

H Hastelloy

Z Zirconium

* Other alloys available. Consult factory for other material torque values. Available coatings: Cadmium, Electroless Nickel, Galvanized, Nickel, Zinc, or Uncoated.