The Seal,special, cataloged under National Stock Number 5330-00-151-4399, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Wellman Dynamics Machining and Assembly, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5330-00-151-4399 |
| Primary Part Number | 520220-1 |
| Item Name | Seal,special |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Wellman Dynamics Machining and Assembly, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 520220-1 | Wellman Dynamics Machining and Assembly, Inc. (USA) |
| Reference | Meaning |
|---|---|
| B13335 | 5/9 Secondary reference Kaydon Ring & Seal Inc Dba Skf Precision Technologies |
| 511485-1 | 3/2 Design control — primary reference U.S. Government activity |
| 520220-1 | 5/9 Secondary reference U.S. Government activity |
NSN 5330-00-151-4399 is a Seal,special, manufactured by Wellman Dynamics Machining and Assembly, Inc., classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-151-4399 has 1 manufacturer part number on file: 520220-1 (Wellman Dynamics Machining and Assembly, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-086-2416, 2825-01-446-2262. Verify interchangeability with system specifications before substitution.
Key specifications for 520220-1: End Item Identification: ARRESTING GEAR BARRIER M-21. 0 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.