The O-Ring, cataloged under National Stock Number 5331-01-542-0740, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Kellog Brown and Root. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-542-0740 |
| Primary Part Number | 01240B |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Kellog Brown and Root |
| Status | ACTIVE |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Center Hole Diameter | 2.471 INCHES MINIMUM AND 2.507 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 |
|---|---|
| 01240B | Kellog Brown and Root (GBR) |
| 00737H | Terberg Dts (uk) Limited (GBR) |
| 200-037-4470 | Defence Seals Pty Ltd Ta Defence Seals & Spares (AUS) |
| Reference | Meaning |
|---|---|
| 205101 ITEM 23 | 5/2 Secondary reference U.S. Government activity |
| 00737H | 3/9 Design control — primary reference U.S. Government activity |
| 01240B | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-01-542-0740 is a O-Ring, manufactured by Kellog Brown and Root, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-542-0740 has 3 manufacturer part numbers on file: 01240B (Kellog Brown and Root), 00737H (Terberg Dts (uk) Limited), 200-037-4470 (Defence Seals Pty Ltd Ta Defence Seals & Spares).
Key specifications for 01240B: Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Center Hole Diameter: 2.471 INCHES MINIMUM AND 2.507 INCHES MAXIMUM IN; End Item Identification: NOZZLE,PRESS FUEL SERVICING,D-1,2.5 IN IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.