The O-Ring, cataloged under National Stock Number 5331-01-577-2730, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is R P M Supply 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-577-2730 |
| Primary Part Number | M-6461 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | R P M Supply Corporation |
| Status | ACTIVE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| M-6461 | R P M Supply Corporation (USA) |
| Reference | Meaning |
|---|---|
| M-6461 | 3/2 Design control — primary reference U.S. Government activity |
| MODEL:B40 SIZE:4 IN. ITEM 38 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-01-577-2730 is a O-Ring, manufactured by R P M Supply Corporation, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-577-2730 has 1 manufacturer part number on file: M-6461 (R P M Supply Corporation).
Key specifications for M-6461: Part Name Assigned by Controlling Agency: CASE O-RING; End Item Identification: B40 4 IN. SELF PRIMING CENTRIFUGAL PUMP IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.