The Ring Set,piston, cataloged under National Stock Number 4310-00-649-8397, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Phillips Air Compressor Service Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-649-8397 |
| Primary Part Number | Z187A |
| Item Name | Ring Set,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Phillips Air Compressor Service Inc |
| Status | ACTIVE |
| Ring Set Component Parts | COMPRESSION RING,20B263,11568,2,OIL RING,71048,11568,1 |
| Piston Accommodation Quantity | 1 |
| Standard Bore Diameter | 1.750 INCHES IN |
| 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 |
|---|---|
| Z187A PRIMARY | Phillips Air Compressor Service Inc (USA) |
| Reference | Meaning |
|---|---|
| Z187A | 5/9 Secondary reference Gardner Denver Inc. |
NSN 4310-00-649-8397 is a Ring Set,piston, manufactured by Phillips Air Compressor Service Inc, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-649-8397 has 1 manufacturer part number on file: Z187A (Phillips Air Compressor Service Inc).
Key specifications for Z187A: Ring Set Component Parts: COMPRESSION RING,20B263,11568,2,OIL RING,71048,11568,1; Piston Accommodation Quantity: 1; Standard Bore Diameter: 1.750 INCHES IN. 3 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.