Harcosemco LLC

186 Cedar St, Branford, CT 06405

ACTIVELAST SEEN IN FEDERAL DATA OCT 2026 · 3 SOURCES

Operating signal within 12 months from two or more independent sources.

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Their homepage, crawled JUL 2026

What they make

Aircraft Engine and Engine Parts Manufacturing336412

components
fixed wing
environmental sensors
harnesses
landing gear
aerospace

NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026

Products

Made or handled here · 2

ground straps · outside air temperature sensors oat

Where these came from

2 from the company’s own website · Company website

url-slug on https://harcosemco.com/products/ground-straps/

Sold by HARCOSEMCO LLC · 9

Cable, Cord, And Wire Assemblies: Communication Equipment · Electrical Hardware And Supplies · Engine Electrical System Components, Nonaircraft · Flight Instruments · Lugs, Terminals, And Terminal Strips · Miscellaneous Aircraft Accessories And Components · Miscellaneous Electric Power And Distribution Equipment · Miscellaneous Vehicular Components · Pressure, Temperature, And Humidity Measuring And Controlling Instruments

Recorded against the company rather than this address. Federal award and drug records name the company, not the plant, so we cannot say which of its sites makes these.

Where these came from

9 from usaspending_psc · Federal registry

Supplied under federal award SPE4A626P8900 (2025-12-16), PSC . An award shows what the government bought from this company; it does not establish which of its sites made it.

CAREERS

Careers page — seen SEP 9, 2026

Where it is

41.29064, -72.81939 · CENSUS TIGER

COUNTY

South Central Connecticut County

METRO AREA

New Haven, CT

ON GOOGLE MAPS

Open this address

STREET VIEW

Open street-level view — JUN 2025

Other plants nearby

Facility	City	Industry	Status	Distance
Harco LLC	Branford	Aircraft Engine and Engine Parts Manufacturing 336412	LIKELY ACTIVE	0.0 KM
Oxley,inc.	Branford	Other Aircraft Parts and Auxiliary Equipment Manufacturing 336413	ACTIVE	4.4 KM
Airborne Industries INC.	Branford	All Other Miscellaneous Textile Product Mills 314999	ACTIVE	5.1 KM
Flight Support, INC.	North Haven	Aircraft Engine and Engine Parts Manufacturing 336412	ACTIVE	9.3 KM
Ouro Aerospace INC	Hamden	Aircraft Manufacturing 336411	ACTIVE	10.5 KM

Every listed plant in South Central Connecticut County

Also at this address

1 other record shares this street address. Separate filings can describe distinct businesses on one site, or the same plant recorded by different agencies, so every record is kept rather than merged away.

Semco Instruments, INC.

Branford, CT

ACTIVE333618

Where this record comes from

3 sources hold this plant, and 10 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

The company’s own websiteOPERATING
first seen JUL 2026 · last seen OCT 2026
Connecticut Secretary of the State business registryOPERATING
Record CT:001t000000WmSl1AAF · first seen FEB 2026 · last seen FEB 2026
SAM.gov entity registrationOPERATING
Record LG1NQXVCYMB4 · first seen JAN 2026 · last seen JAN 2026

IN SOUTH CENTRAL CONNECTICUT COUNTY29 other plants share this one’s industry (Aerospace Product and Parts Manufacturing, NAICS 3364); 11 of them have a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name: SAM.gov: HARCOSEMCO LLC · JAN 2026
Street address: SAM.gov: 186 CEDAR ST · JAN 2026
City: SAM.gov: BRANFORD · JAN 2026
State: SAM.gov: CT · JAN 2026
Coordinates: Census geocoder: 41.290637265419,-72.819393414288 · JUL 2026
Website: SAM.gov: https://harcosemco.com · JAN 2026
Year established: CT SOTS: 1954 · SEP 1954
CAGE code: SAM.gov: 00060 · JAN 2026
SAM registration expires: SAM.gov: 2026-12-26 · JAN 2026
State business registrationSOURCES DISAGREE: CO SOS: HarcoSemco LLC, registered with the Colorado Secretary of State; Limited liability company formed in Connecticut; registered 2019-01-21; active · JAN 2019; CT SOTS: HARCOSEMCO LLC, registered with the Connecticut Secretary of the State; Limited liability company; formed 1954-09-23; active, annual report filed 2026-02-16 · FEB 2026

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