The O-Ring, cataloged under National Stock Number 5331-01-526-2771, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Circor Pumps North America Llc. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-526-2771 |
| Primary Part Number | PP056SB1-135 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Circor Pumps North America Llc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Hardness Rating | 65.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | ASTMD 2000 2BG720B14EA14EF11EF21EO14EO34F17 OR ASTM D2000 2BG715B14EA14EF11EF21EO14EO34F17 ASSN STD SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 1.908 INCHES MINIMUM AND 1.942 INCHES MAXIMUM IN |
| 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 |
|---|---|
| PP056SB1-135 PRIMARY | Circor Pumps North America Llc (USA) |
NSN 5331-01-526-2771 is a O-Ring, manufactured by Circor Pumps North America Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-526-2771 has 1 manufacturer part number on file: PP056SB1-135 (Circor Pumps North America Llc).
Key specifications for PP056SB1-135: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Hardness Rating: 65.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: ASTMD 2000 2BG720B14EA14EF11EF21EO14EO34F17 OR ASTM D2000 2BG715B14EA14EF11EF21EO14EO34F17 ASSN STD SINGLE MATERIAL RESPONSE; Center Hole Diameter: 1.908 INCHES MINIMUM AND 1.942 INCHES MAXIMUM IN. 5 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.