The Seal,plain, cataloged under National Stock Number 5330-01-721-9705, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 3 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-721-9705 |
| Primary Part Number | 121-1611 |
| Item Name | Seal,plain |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Seal Width | 3.9 INCHES NOMINAL IN |
| Outside Diameter | 0.51 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | DUAL LIP |
| 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 |
|---|---|
| 121-1611 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5330-01-721-9705 is a Seal,plain, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-721-9705 has 1 manufacturer part number on file: 121-1611 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 121-1611: Seal Width: 3.9 INCHES NOMINAL IN; Outside Diameter: 0.51 INCHES NOMINAL IN; Cross-Sectional Shape Style: DUAL LIP; Special Features: INSIDE DIAMETER 3.35 INCHES IN. 3 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.