The Spring,flat, cataloged under National Stock Number 5360-00-373-9463, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Firstmark Aerospace Corp. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-00-373-9463 |
| Primary Part Number | 856676 |
| Item Name | Spring,flat |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Firstmark Aerospace Corp |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 856676 | Honeywell International Inc. Dba Honeywell International (USA) |
| 856676 PRIMARY | Firstmark Aerospace Corp (USA) |
| Reference | Meaning |
|---|---|
| 856676 | 5/9 Secondary reference U.S. Government activity |
| 856676 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
NSN 5360-00-373-9463 is a Spring,flat, manufactured by Firstmark Aerospace Corp, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-373-9463 has 2 manufacturer part numbers on file: 856676 (Honeywell International Inc. Dba Honeywell International), 856676 (Firstmark Aerospace Corp).
1 possible match (shared part number, not a government interchangeability claim): 5320-00-954-3922. Verify interchangeability with system specifications before substitution.
Key specifications for 856676: Special Features: PHOSPHOR BRONZE,0/A LG 1.750 IN.,0/A W 0.375 IN.,4 MTG HOLES 0.104 IN. DIA,1 MTG HOLE 0.159 IN. DIA,THK 0.006 IN. IN. 0 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.