SIC Code 3764 — Guided Missile and Space Vehicle Propulsion Units and Propulsion Unit Parts

4-digit industry in the 1987 Standard Industrial Classification — still requested by banks, insurers, SEC filings and legacy systems.

Code	3764
Title	Guided Missile and Space Vehicle Propulsion Units and Propulsion Unit Parts
System	SIC 1987 (final edition — replaced by NAICS in 1997)

The SIC was last revised in 1987 and officially superseded by NAICS in 1997, but it never fully disappeared: the SEC still tags EDGAR filings with SIC codes, and many banks, insurers and legacy databases keep requesting it. That is why converting between the two systems is still routine work.

NAICS equivalents of SIC 3764

From the official U.S. Census concordance (1987 SIC → 2002 NAICS). Where the 2002 code no longer exists in NAICS 2022, the closest current code is shown.

NAICS 2002	Title (2002)	Current 2022 code
336415	Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing	336415 (same code)
541710	Research and Development in the Physical, Engineering, and Life Sciences	superseded — closest: 54171 Research and Development in the Physical, Engineering, and Life Sciences

Other SIC codes in 37xx

• 3711 — Motor Vehicles and Passenger Car Bodies
• 3713 — Truck and Bus Bodies
• 3714 — Motor Vehicle Parts and Accessories
• 3715 — Truck Trailers
• 3716 — Motor Homes
• 3721 — Aircraft
• 3724 — Aircraft Engines and Engine Parts
• 3728 — Aircraft Parts and Auxiliary Equipment, Not Elsewhere Classified
• 3731 — Ship Building and Repairing
• 3732 — Boat Building and Repairing
• 3743 — Railroad Equipment
• 3751 — Motorcycles, Bicycles, and Parts

Data: 1987 SIC titles (OSHA/Census) and official Census concordance — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.