The Ring,piston, cataloged under National Stock Number 4310-00-449-4582, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Mako Compressors, Llc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-449-4582 |
| Primary Part Number | N1787 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Mako Compressors, Llc |
| Status | ACTIVE |
| Cross-Sectional Shape Style | STRAIGHT FACE, SCRAPER |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.1500 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 3.500 INCHES IN |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| N1787 PRIMARY | Mako Compressors, Llc (USA) |
| Reference | Meaning |
|---|---|
| N122 | 5/9 Secondary reference Mako Compressors, Llc |
| N1080 | 5/9 Secondary reference Mako Compressors, Llc |
NSN 4310-00-449-4582 is a Ring,piston, manufactured by Mako Compressors, Llc, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-449-4582 has 1 manufacturer part number on file: N1787 (Mako Compressors, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5340-00-578-0163. Verify interchangeability with system specifications before substitution.
Key specifications for N1787: Overall Width: 0.1180 INCHES NOMINAL IN; Cross-Sectional Shape Style: STRAIGHT FACE, SCRAPER; Joint Style: VERTICAL JOINT; Radial Wall Thickness: 0.1500 INCHES NOMINAL IN. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.