The Rubber Round Section, cataloged under National Stock Number 5330-01-321-8403, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-321-8403 |
| Primary Part Number | 1596AS238 |
| Item Name | Rubber Round Section |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Temp Rating | -80.0 FAHRENHEIT AND 425.0 FAHRENHEIT DEGF |
| Length | 319.500 INCHES MINIMUM AND 320.500 INCHES MAXIMUM IN |
| Material Document and Classification | ZZ-R-765, CLASS 2B, GRADE 40 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Surface Condition | SMOOTH BOTH SIDES |
| Cross-Sectional Shape Style | CIRCULAR |
| Cross Section Outside Diameter | 0.441 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Material | RUBBER SILICONE CLASS Q LOCATION NOT OTHERWISE SPECIFIED |
| Nonmetallic Hardness Rating | 35.0 MINIMUM SHORE DUROMETER A AND 45.0 MAXIMUM SHORE DUROMETER A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1596AS238 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| ZZ-R-765 CL2B G R40 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5330-01-321-8403 is a Rubber Round Section, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-321-8403 has 1 manufacturer part number on file: 1596AS238 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-642-1179. Verify interchangeability with system specifications before substitution.
Key specifications for 1596AS238: Temp Rating: -80.0 FAHRENHEIT AND 425.0 FAHRENHEIT DEGF; Length: 319.500 INCHES MINIMUM AND 320.500 INCHES MAXIMUM IN; Material Document and Classification: ZZ-R-765, CLASS 2B, GRADE 40 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Surface Condition: SMOOTH BOTH SIDES. 8 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.