The Holder,spring, cataloged under National Stock Number 5340-00-579-7633, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Woodward, Inc. Div Fuel Systems and Controls. Government technical data includes 4 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 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 | 5340-00-579-7633 |
| Primary Part Number | 401658 |
| Item Name | Holder,spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Woodward, Inc. Div Fuel Systems and Controls |
| Status | ACTIVE |
| FSC Application Data | 1. CONTROL,MAIN FUEL,ENGINE,AIRCRAFT |
| Supporting Object/surface Attachment Method | FRICTION MOUNTED BY SPRING COMPRESSION ON MATED MACHINED PARTS |
| Attachment to Item Supported Method | FRICTION MOUNTED BY SPRING COMPRESSION |
| Material | STEEL |
| 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 |
|---|---|
| 401658 PRIMARY | Woodward, Inc. Div Fuel Systems and Controls (USA) |
NSN 5340-00-579-7633 is a Holder,spring, manufactured by Woodward, Inc. Div Fuel Systems and Controls, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-579-7633 has 1 manufacturer part number on file: 401658 (Woodward, Inc. Div Fuel Systems and Controls).
2 possible matches (shared part number, not a government interchangeability claim): 5950-01-025-7201, 5355-01-345-7610. Verify interchangeability with system specifications before substitution.
Key specifications for 401658: FSC Application Data: 1. CONTROL,MAIN FUEL,ENGINE,AIRCRAFT; Supporting Object/surface Attachment Method: FRICTION MOUNTED BY SPRING COMPRESSION ON MATED MACHINED PARTS; Attachment to Item Supported Method: FRICTION MOUNTED BY SPRING COMPRESSION; Material: STEEL. 4 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.