Shoulder(Header) Plugs
UNF Plugs for Fin-Fans®

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Shoulder Plug Product Features:

Plug Sizes:	3/4” – 2-1/8” (for 5/8” – 2” Tube O.D.)
Length Under Head:	3/4” – 3”
Materials:	Carbon Steel, 316 Stainless, custom alloys/coatings
Easy Installation:	Threaded design fits header plug sheets
Maintenance-Friendly:	Access for inspection, cleaning, and tube plugging
Durable & Safe:	Handles high pressure/temperature, prevents leaks
Custom Options:	Non-standard sizes available
Fast Delivery:	Same-day shipping on stock, local TX/LA delivery
Applications:	Air-cooled heat exchangers in oil & gas, refineries, petrochemical, power plants

Shoulder Plug
Sizing Chart

Shoulder Plug
Description

Shoulder Plug
Description & Uses

Snap It®
Engineered Tube Plugs

⚠ 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.

SHOULDER PLUG / HEADER PLUG DESCRIPTION:

Header Plugs, also referred to as Shoulder or UNF Plugs, are threaded plugs specifically designed for use in fin-fan® heat exchangers. Fin-fans*, also recognized as air-cooled heat exchangers, are essential devices utilized to extract heat from process fluids by transferring it to the surrounding air.

For the world's largest industrial facilities, halting a shutdown or turnaround for a small part of a heat exchanger is not feasible. We have the capacity to manufacture over 1,000 header plugs / shoulder plugs daily for your fin-fan, maintaining high quality and adhering to your precise specifications, with shipping available 24/7!

The next time you require plugs for your fin-fan, reach out to USA Industries. Our in-stock plugs and gaskets can be shipped on the same day!