Sample supplier report · October 21, 2026

Texas sheet metal enclosure suppliers

Sheet metal fabrication suppliers in Texas for enclosures” Assumed: any volume · ISO 9001, UL 50 / NEMA enclosure ratingsThe buyer’s question, as they typed it. Assumed: Assumed: any volume · ISO 9001, UL 50 / NEMA enclosure ratings.

The answer

Send the RFQ to all four; 17 questions to settle first. Second-source Nema Enclosures: UL508A listed, built in Houston.

The shortlist

Rank	Supplier	Role	Where	Score
1	EVS Texas (EVS Metal)	Lead	USA	24 / 24
2	Nema Enclosures	Second source	Houston, TX	22 / 24
3	Ambox Limited	On hold	Houston, TX	22 / 24
4	Guzman Manufacturing	Fallback	Dallas, TX	20 / 24
5	Star Precision	Fallback	Houston, TX	20 / 24

Scorecard, criterion by criterion

Criterion	EVS Texas (EVS Metal)	Nema Enclosures	Ambox	Guzman	Star
Enclosures ×2Your ask	8	8	6	4	4
Sheet metal fabrication ×2Your ask	8	6	8	8	8
Texas location ×2Your ask	8	8	8	8	8
Total of 24	24	22	22	20	20

Points as weighted: the buyer’s asks count double where marked. A dash means nothing published backs a score, so it isn’t counted as zero.

The suppliers

EVS Texas (EVS Metal)

Lead · USA

It is a contract fabricator with enclosure work and in-house finishing and assembly at a large Texas plant. States an ISO 9001:2015-compliant process. In-house machining, welding, powder coating and assembly.

Nema Enclosures

Second source · Houston

It is a Houston supplier that specializes in custom NEMA-rated electrical enclosures. Quotes through its RFQ page or main line 713-921-2233. Announced a new facility in 2024 to add capacity.

Guzman Manufacturing

Fallback · Dallas

It is a certified Dallas-area sheet metal shop that lists enclosures and cabinets among its typical jobs. AS9100 certified. Works stainless, aluminum, galvanized, inconel and titanium.

Key findings

The supply base in Texas and the US: 4.1 texas manufacturing production index (Dallas Fed, June survey).
EVS Texas (EVS Metal) leads on plant area at 139,000 sq ft; next Star at 115,000 sq ft.
Star names the most customers (3); Ambox next (2).
Texas-made enclosures carry 0% US duty; Chinese imports carry 37.5%

Settle these before you send the RFQ

Q1Confirm in writing: ISO 9001.
Q2Confirm in writing: UL 50 / NEMA enclosure ratings.
Q3Ask every bidder how many production lines it would run for the order.
Q4A registrar-issued ISO 9001 certificate for Pflugerville, the UL panel-shop file number, and which NEMA types it builds. (EVS Texas (EVS Metal))
Q5Send the renewed ISO 9001:2015 certificate. (Nema Enclosures)
Q6The current ISO 9001 certificate and its expiry, and whether the new powder coat facility is running. (Nema Enclosures)
Q7Confirm the floor area of the plant that would build the order. (Nema Enclosures)
Q8Send the renewed ISO 9001:2015 certificate. (Ambox)
Q9Whether it renewed ISO 9001, and whether its enclosures are UL listed. (Ambox)
Q10Whether it builds NEMA-rated or UL-listed enclosures, or only unrated housings. (Guzman)
Q11The ISO registrar’s name, and whether its enclosures carry NEMA or UL ratings. (Star)

How the research was done

36 found → 27 fit the brief → 19 researched → 5 ranked. Every score in the full report links to the page it came from, and the open questions are written out for the RFQ.

Sources

Read the full report

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