Request a Quote on 4"" Square Boxes - Extensions Parts You Require from Our Website Today!

Here on Industrial World 360, we are unmatched in our ability to provide customers time and cost savings on all the 4"" Square Boxes - Extensions parts they require for their operations. On this page, you can find every listing that we have ready-for-purchase for this particular subcategory of items, including in-demand part numbers like 4-SW-EXT-SPL, 4SB-MKO-EHB, 4SB-MKO-EXT, 4SDB-MKO-EXT, 4SE-1 2, 4SE-3 4, 4SES, and various others. Take the time to explore our offerings as you see fit, and you may always fill out and submit an RFQ form as provided on our website for the means of requesting quotes for your comparisons.

To ensure that we only supply customers with the absolute best on the market, we enact rigorous vetting processes for every entity that we source from, and countless parts are subjected to varying levels of quality control assurance prior to shipment. Alongside our commitment to the fit, form, and functionality of every listing, we also strive to always meet any time constraints that our customers may have with expedited shipping options on domestic and international orders alike. If you have any potential restrictions or needs, be sure to let us know as soon as you can so that we can best tailor a solution to meet your requirements.

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Part No.DescriptionManufacturerSub CategoryRFQ
4-sw-ext-splSteel City 4-SW-EXT-SPL 4"" Square Extension Ring, 1-1/2"" Deep, Welded, MetallicSteel City
4sb-mko-ehbOrbit Industries 4SB-MKO-EHB 4"" Square Extension Ring, WeldedOrbit Industries
4sb-mko-extOrbit Industries 4SB-MKO-EXT 4"" Square Extension Ring, WeldedOrbit Industries
4sdb-mko-extOrbit Industries 4SDB-MKO-EXT 4"" Square Extension Ring, 2-1/8"" Deep, Welded, SteelOrbit Industries
4se-1-2Appleton 4SE-1/2 4"" Square Extension Ring, 1-1/2"" Deep, Drawn, MetallicAppleton
4se-3-4Appleton 4SE-3/4 4"" Square Extension Ring, 1-1/2"" Deep, Drawn, MetallicAppleton
4sesAppleton 4SES 4"" Square Extension Ring, 1-1/2"" Deep, Drawn, MetallicAppleton
4sesrdAppleton 4SESRD 4 In Sq Ext-thru Ring RedAppleton
4ssbesplAppleton 4SSBESPL 4"" Square Extension Ring, 1-1/2"" Deep, Welded, MetallicAppleton
53151-1-2Steel City 53151-1/2 4 INCH SQ BX EXT,STL,21CU,1/2KOIN.Steel City
53151-1-2-3-4Steel City 53151-1/2-3/4 4"" Square Extension Ring, 1-1/2"" Deep, Drawn, MetallicSteel City
53151-3-4Steel City 53151-3/4 4 INCH SQ BX EXT,STL,21CU,3/4KOIN.Steel City
531511234-20rSteel City 531511234-20R STL 531511234-20R 4 SQ 1 1/2Steel City
531511234ubSteel City 531511234UB 1/2 & 3/4 BOX EXT RING 21CUB STLSteel City
531511-23-4ub-30Steel City 531511/23/4UB-30 UNIT UPC CODE: 785991 16781Steel City
53151-subGarvin Industries 53151-SUB 4"" SQ EXTRNG,1-1/2D, FOR UTILGarvin Industries
53151-svtGarvin Industries 53151-SVT 4"" SQ EXTRNG, 1-1/2D, PLENUMGarvin Industries
53171-1Steel City 53171-1 4"" Square Extension Ring, 2-1/8"", Welded, MetallicSteel City
53171-1Garvin Industries 53171-1 4"" SQBX, 2-1/8D, DRWN,Garvin Industries
53171-subGarvin Industries 53171-SUB 4 SQ EXT RING 2-1/8 DGarvin Industries

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Americas Fastest Growing Private Company
ASA Member
NBAA Member
ISO 9001:2015 & AS9120B
Cage Code 6RE77
ITAR
eCustoms Visual Compliance
D-U-N-S Number 069876325
FAA 0056 B Accredited
ESD S20.20
AS 6081:2012
NIST 800-171 Compliance
Top Distributors 2018
Top Distributors 2020
Top Distributors 2025
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