The O-Ring, cataloged under National Stock Number 5331-01-164-6843, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Leonardo S.p.a. - Electronics Division - Defence Business Area. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-164-6843 |
| Primary Part Number | 230079104 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Leonardo S.p.a. - Electronics Division - Defence Business Area |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZY |
| Elongation Percentage | 160 MAXIMUM |
| Peripheral Diameter | 1.262 INCHES NOMINAL IN |
| Center Hole Diameter | 0.978 INCHES MINIMUM AND 0.990 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 230079104 | Leonardo S.p.a. - Electronics Division - Defence Business Area (ITA) |
| Reference | Meaning |
|---|---|
| C-7538/2832PC18 | 5/1 Secondary reference Hydrasearch Company, Llc |
| 10078-F-18ITEM321I | 5/1 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| 10078-F-18ITEM321I | 5/9 Secondary reference U.S. Government activity |
| MS28775-214 | 4/1 Identification reference U.S. Government activity |
| 2640-622PC17 | 5/1 Secondary reference U.S. Government activity |
| C-7538/2832PC18 | 5/9 Secondary reference Hydrasearch Co., Inc. Dba Use CAGE Code 32142 for Cataloging |
| 01-435-0212-5PC96 | 5/1 Secondary reference Flowserve Corp Dba Automax Actuators Div Flowserve Us Company |
| 01-435-0146-5PC96 | 5/1 Secondary reference Flowserve Corp Dba Automax Actuators Div Flowserve Us Company |
| P186A | 3/9 Design control — primary reference Atlas Valve Co |
| NAP840 PC 17 | 5/9 Secondary reference Atlas Valve Co |
| C-8925PC18 | 5/1 Secondary reference U.S. Government activity |
| 845-2109845PC17 | 5/1 Secondary reference U.S. Government activity |
NSN 5331-01-164-6843 is a O-Ring, manufactured by Leonardo S.p.a. - Electronics Division - Defence Business Area, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-164-6843 has 1 manufacturer part number on file: 230079104 (Leonardo S.p.a. - Electronics Division - Defence Business Area).
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-387-2708, 5331-01-624-5847. Verify interchangeability with system specifications before substitution.
Key specifications for 230079104: Temp Rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Criticality Code Justification: ZZZY; Elongation Percentage: 160 MAXIMUM. 8 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.