The Plunger,quick Release, cataloged under National Stock Number 5340-01-254-0025, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Hutchinson Aerospace & Industry, Inc. Dba Vlier Div Vlier. Government technical data includes 5 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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-254-0025 |
| Primary Part Number | SSM-56 |
| Item Name | Plunger,quick Release |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Hutchinson Aerospace & Industry, Inc. Dba Vlier Div Vlier |
| Status | ACTIVE |
| Thread Length | 0.562 INCHES MAXIMUM IN |
| Shape | ROUND |
| Nominal Thread Size | 0.3125 INCHES IN |
| Thread Quantity Per Inch | 18 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| SSM-56 PRIMARY | Hutchinson Aerospace & Industry, Inc. Dba Vlier Div Vlier (USA) |
NSN 5340-01-254-0025 is a Plunger,quick Release, manufactured by Hutchinson Aerospace & Industry, Inc. Dba Vlier Div Vlier, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-254-0025 has 1 manufacturer part number on file: SSM-56 (Hutchinson Aerospace & Industry, Inc. Dba Vlier Div Vlier).
Key specifications for SSM-56: Thread Length: 0.562 INCHES MAXIMUM IN; Shape: ROUND; Overall Length: 0.641 INCHES MINIMUM AND 0.651 INCHES MAXIMUM IN; Nominal Thread Size: 0.3125 INCHES IN. 5 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.