The Bracket,mounting, cataloged under National Stock Number 5340-01-504-1978, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-504-1978 |
| Primary Part Number | 145SK255-3 |
| Item Name | Bracket,mounting |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Mounting Hole Quantity | 10 |
| Material Document and Classification | SAE-AMS-QQ-A-250 ASSN STD ALL MATERIAL RESPONSES |
| Material | ALUMINUM ALLOY 2025 |
| Mounting Hole Type | PLAIN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 145SK255-3 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 145SK255 | D/9 Drawing number reference only The Boeing Company |
NSN 5340-01-504-1978 is a Bracket,mounting, manufactured by The Boeing Company, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-504-1978 has 1 manufacturer part number on file: 145SK255-3 (The Boeing Company).
7 possible matches (shared part number, not a government interchangeability claim): 5340-01-504-1985, 5340-01-504-2023, 5340-01-504-2031. Verify interchangeability with system specifications before substitution.
Key specifications for 145SK255-3: Mounting Hole Quantity: 10; Overall Height: 2.000 INCHES NOMINAL IN; Material Document and Classification: SAE-AMS-QQ-A-250 ASSN STD ALL MATERIAL RESPONSES; Overall Length: 4.400 INCHES NOMINAL IN. 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.
NSN 5340-01-504-1978 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.