The O-Ring, cataloged under National Stock Number 5331-01-078-4502, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Parker-Hannifin Corp Div O-Ring Division. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-078-4502 |
| Primary Part Number | NM304 2-246 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-Ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Temp Rating | -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF |
| Elongation Percentage | 164 MAXIMUM |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Center Hole Diameter | 4.469 INCHES MINIMUM AND 4.499 INCHES MAXIMUM IN |
| Outside Diameter | 4.724 INCHES MINIMUM AND 4.800 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| D49273 ITEM 27 | Hunt Valve Company, Inc. (USA) |
| A48607MZZ | Hunt Valve Company, Inc. (USA) |
| D49273 ITEM 27 | Hunt Valve Company Inc Dba Union Flonetics (USA) |
| A48607MZZ | Hunt Valve Company Inc Dba Union Flonetics (USA) |
| 2-246N304-75 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| NM304 2-246 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
NSN 5331-01-078-4502 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331 (O-Ring). Status: active.
NSN 5331-01-078-4502 has 6 cross-referenced part numbers: D49273 ITEM 27 (Hunt Valve Company, Inc.), A48607MZZ (Hunt Valve Company, Inc.), D49273 ITEM 27 (Hunt Valve Company Inc Dba Union Flonetics), A48607MZZ (Hunt Valve Company Inc Dba Union Flonetics), 2-246N304-75 (Parker-Hannifin Corp Div O-Ring Division) and 1 more.
There is 1 known substitute for 5331-01-078-4502: 5331-00-585-8249. Verify interchangeability with system specifications before substitution.
Key specifications for NM304 2-246: Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL; Temp Rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF; Elongation Percentage: 164 MAXIMUM. 7 total characteristics are documented in the Federal Logistics Information System.