The O-Ring, cataloged under National Stock Number 5331-00-979-5540, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Dresser Industries Inc Leroi Div. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-979-5540 |
| Primary Part Number | 125-186 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-Ring |
| Manufacturer | Dresser Industries Inc Leroi Div |
| Status | ACTIVE |
| Center Hole Diameter | 3.969 INCHES MINIMUM AND 3.999 INCHES MAXIMUM IN |
| Material | RUBBER |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 125-186 PRIMARY | Dresser Industries Inc Leroi Div (USA) |
NSN 5331-00-979-5540 is a O-Ring, manufactured by Dresser Industries Inc Leroi Div, classified under FSC 5331 (O-Ring). Status: active.
NSN 5331-00-979-5540 has 1 cross-referenced part number: 125-186 (Dresser Industries Inc Leroi Div).
There are 4 known substitutes for 5331-00-979-5540: 5930-00-130-5349, 5305-00-370-1208, 4010-00-619-8032 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for 125-186: Center Hole Diameter: 3.969 INCHES MINIMUM AND 3.999 INCHES MAXIMUM IN; Material: RUBBER; Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. 3 total characteristics are documented in the Federal Logistics Information System.