The Ring,piston, cataloged under National Stock Number 4310-01-008-3508, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Bei Sensors & Systems Company, Inc. Dba Bei Duncan. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4310-01-008-3508 |
| Primary Part Number | 255136 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Bei Sensors & Systems Company, Inc. Dba Bei Duncan |
| Status | ACTIVE |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.1900 INCHES NOMINAL IN |
| Ring Style | CONCENTRIC |
| Standard Bore Diameter | 1.812 INCHES IN |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 255136 PRIMARY | Bei Sensors & Systems Company, Inc. Dba Bei Duncan (USA) |
| Reference | Meaning |
|---|---|
| 255136 | 3/9 Design control — primary reference Bei Sensors & Systems Co. Inc Dba Edcliff Instruments Division |
NSN 4310-01-008-3508 is a Ring,piston, manufactured by Bei Sensors & Systems Company, Inc. Dba Bei Duncan, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-008-3508 has 1 manufacturer part number on file: 255136 (Bei Sensors & Systems Company, Inc. Dba Bei Duncan).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-535-7430. Verify interchangeability with system specifications before substitution.
Key specifications for 255136: Overall Width: 0.1600 INCHES NOMINAL IN; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE; Joint Style: VERTICAL JOINT; Radial Wall Thickness: 0.1900 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.