The Retainer,packing, cataloged under National Stock Number 5330-00-478-6717, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5330-00-478-6717 |
| Primary Part Number | 3958-01 |
| Item Name | Retainer,packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.210 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | SQUARE/RECTANGULAR |
| Peripheral Diameter | 4.640 INCHES NOMINAL IN |
| Center Hole Diameter | 4.406 INCHES NOMINAL IN |
| Material | RUBBER SILICONE CLASS Q OVERALL |
| Joint Type | BUTT RETAINER |
| 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 |
|---|---|
| 3958-01 PRIMARY | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| Reference | Meaning |
|---|---|
| B3958-1 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 3958-1 | 5/9 Secondary reference Howell Laboratories Inc Dba Howell Laboratories Inc |
NSN 5330-00-478-6717 is a Retainer,packing, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-478-6717 has 1 manufacturer part number on file: 3958-01 (Howell Laboratories Inc Dba Howell Laboratories Inc).
3 possible matches (shared part number, not a government interchangeability claim): 4520-01-095-4802, 4730-01-115-8451, 1450-01-646-0367. Verify interchangeability with system specifications before substitution.
Key specifications for 3958-01: Cross-Sectional Height: 0.210 INCHES NOMINAL IN; Cross-Sectional Shape Style: SQUARE/RECTANGULAR; Peripheral Diameter: 4.640 INCHES NOMINAL IN; Center Hole Diameter: 4.406 INCHES NOMINAL IN. 6 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.