The O-Ring, cataloged under National Stock Number 5331-01-077-3150, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Kitco Llc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5331-01-077-3150 |
| Primary Part Number | 99-4781-138 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Kitco Llc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.099 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN |
| Center Hole Diameter | 2.091 INCHES MINIMUM AND 2.133 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| 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 |
|---|---|
| 99-4781-138 | Kitco Llc (USA) |
| 99-4781-138 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 99-4781-138 | Hutchinson Seal De Mexico Stillman Seal Division Div Stillman Seal,jpr,espa (MEX) |
| Reference | Meaning |
|---|---|
| 99-4781-138 | 5/9 Secondary reference Pesco Div Borg-Warner Corp |
| 99-4781-138 | 5/2 Secondary reference U.S. Government activity |
| 99-4781-138 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-01-077-3150 is a O-Ring, manufactured by Kitco Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-077-3150 has 3 manufacturer part numbers on file: 99-4781-138 (Kitco Llc), 99-4781-138 (Parker-Hannifin Corp Div O-Ring Division), 99-4781-138 (Hutchinson Seal De Mexico Stillman Seal Division Div Stillman Seal,jpr,espa).
Key specifications for 99-4781-138: Cross-Sectional Height: 0.099 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN; Center Hole Diameter: 2.091 INCHES MINIMUM AND 2.133 INCHES MAXIMUM IN; Material: RUBBER FLUOROSILICONE CLASS FQ. 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.