The Rolling Diaphragm, cataloged under National Stock Number 4610-01-061-5984, is classified within Federal Supply Class 4610 (Water Purification Equipment) of the Water Purification and Sewage Treatment group. The manufacturer of record is Bellofram Corporation. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4610-01-061-5984 |
| Primary Part Number | 40201026 |
| Item Name | Rolling Diaphragm |
| FSC / FSG | 4610 / 46 — Water Purification Equipment |
| Manufacturer | Bellofram Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | BUNA-N,CYLINDER BORE 4.00 IN.,PISTON DIA 3.69 IN.,HT 2.44 IN.,THK 0.035 IN.,PRESSURE AREA 11.61 IN.,CONVOLUTION 0.155 IN.,MAX HALF STROKE 1.89 IN.; DESIGNED FOR USE ON AN OIL SKIMMER 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 |
|---|---|
| 40201026 PRIMARY | Bellofram Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1025-40201 PC26 | 5/9 Secondary reference Jbf Scientific Corp |
NSN 4610-01-061-5984 is a Rolling Diaphragm, manufactured by Bellofram Corporation, classified under FSC 4610, Water Purification Equipment. Status: active.
NSN 4610-01-061-5984 has 1 manufacturer part number on file: 40201026 (Bellofram Corporation).
Key specifications for 40201026: General Characteristics Item Description: BUNA-N,CYLINDER BORE 4.00 IN.,PISTON DIA 3.69 IN.,HT 2.44 IN.,THK 0.035 IN.,PRESSURE AREA 11.61 IN.,CONVOLUTION 0.155 IN.,MAX HALF STROKE 1.89 IN.; DESIGNED FOR USE ON AN OIL SKIMMER IN. 1 specification is 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.