The O-Ring, cataloged under National Stock Number 5331-00-118-4156, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-118-4156 |
| Primary Part Number | M25988/1-381 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-Ring |
| Manufacturer | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| Status | ACTIVE |
| Material | RUBBER FLUOROSILICONE CLASS FQ |
| Center Hole Diameter | 11.910 INCHES MINIMUM AND 12.040 INCHES MAXIMUM IN |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Elongation Percentage | 125 MAXIMUM |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Outside Diameter | 12.395 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| M25988/1-381 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| MIL-DTL-25988/1 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 68-667 | Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes) (USA) |
NSN 5331-00-118-4156 is a O-Ring, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5331 (O-Ring). Status: active.
NSN 5331-00-118-4156 has 3 cross-referenced part numbers: M25988/1-381 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-25988/1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 68-667 (Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)).
There are 2 known substitutes for 5331-00-118-4156: 5330-00-221-4144, 3020-01-066-7498. Verify interchangeability with system specifications before substitution.
Key specifications for M25988/1-381: Material: RUBBER FLUOROSILICONE CLASS FQ; Center Hole Diameter: 11.910 INCHES MINIMUM AND 12.040 INCHES MAXIMUM IN; Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Elongation Percentage: 125 MAXIMUM. 6 total characteristics are documented in the Federal Logistics Information System.