NSN 1660-00-462-0307, 1660004620307
CYLINDER,PISTON,REGULATOR

Federal Supply Classification: FSC 1660 - Aircraft Air Conditioning, Heating, and Pressurizing Equipment
National Item Identification Number: NIIN 004620307
Codification Country: United States
Item Name Code: INC 77777
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

Availability: Readily Available Qualified Suppliers: Currently qualifying suppliers

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DLMS^® Summary

National Stock Number 1660-00-462-0307

National Stock Number (NSN) 1660-00-462-0307, or NIIN 004620307, (cylinder,piston,regulator) was assigned February 27, 1972 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There is only one manufacturer part number associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 3 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, there are no suppliers that are deemed design controlled or valid supply parts.

This part number has not been procured by the US Government in over 5 years.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Aug 02, 2005, this NSN's acquisition method was noted as: Not established. Not established.

This NSN is assigned to Item Name Code (INC) 77777. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1660004620307 does not contain precious metals.

This NSN is associated to Schedule B 8803300060: other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof). The Schedule B End Use is listed as parts for military-type goods. NAICS classification category 336413: other aircraft parts and auxiliary equipment manufacturing.

This information was last updated on Aug 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) ALUMINUM ALLOY,QQ-A-225/6,COMPOSITION 2024 T4,ANODIZED PERMIL-A-8625,TYPE 2,CLASS 2 DYED BLACK,1.795 IN. MIN,1.805 IN. MAX BODYOD,1.875 IN. MIN,1.885 IN. MAX THREADED END OD,1.727 IN. MIN,1.777 IN.MAX L,1.725 IN. MIN,1.735 IN. MAX MAJOR ID,1.695 IN. MIN,1.705 IN. MAXDIA FIRST COUNTERBORE,1.652 IN. MIN,1.662 IN. MAX DIA SECOND COUNTERBORE,1.875-20 UNC-3A THREADS ON ONE END,1.620 IN. MIN,1.640 IN. MAX SMALLESTID,TWO 0.142 IN. MIN,0.162 IN. MAX HOLES DRILLED THROUGH FACE 0.177 IN.MIN,0.197 IN. MAX CENTERLINE RADIUS FROM CENTER OF FACE,FOUR 0.240 IN.MIN,0.260 IN. MAX HOLES EQUALLY SPACED AROUND OD 0.615 IN. MIN,0.635 IN.MAX DISTANCE HOLE CENTERS TO THREADED END,FOUR 0.037 IN. MIN,0.057 IN. MAXHOLES EQUALLY SPACED AROUND OD 0.030 IN. MIN,0.050 IN. MAX DISTANCE FROMFACE
FSC APPLICATION DATA: (ZZZV) REGULATOR,ACFT ENVIROMNENTAL SYSTEM,B52