The Ring,piston, cataloged under National Stock Number 4310-01-252-8431, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is M.t. Davidson Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4310-01-252-8431 |
| Primary Part Number | G-87 PIECE 56 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | M.t. Davidson Company |
| Status | ACTIVE |
| Radial Wall Thickness | 0.3100 INCHES NOMINAL IN |
| Standard Bore Diameter | 8.380 INCHES IN |
| Material | COPPER ALLOY 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 |
|---|---|
| G-87 PIECE 56 PRIMARY | M.t. Davidson Company (USA) |
| Reference | Meaning |
|---|---|
| G-89 PIECE 56 | 5/9 Secondary reference M.t. Davidson Company |
NSN 4310-01-252-8431 is a Ring,piston, manufactured by M.t. Davidson Company, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-252-8431 has 1 manufacturer part number on file: G-87 PIECE 56 (M.t. Davidson Company).
Key specifications for G-87 PIECE 56: Overall Width: 0.2880 INCHES NOMINAL IN; Radial Wall Thickness: 0.3100 INCHES NOMINAL IN; Standard Bore Diameter: 8.380 INCHES IN; Material: COPPER ALLOY OVERALL. 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.