The Nut,sheet Spring, cataloged under National Stock Number 5310-00-211-3439, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-211-3439 |
| Primary Part Number | 406 373 |
| Item Name | Nut,sheet Spring |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company |
| Status | ACTIVE |
| Nut Width | 0.500 INCHES NOMINAL IN |
| Nut Length | 0.778 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-P-6889,TY 1 MIL SPEC ALL TREATMENT RESPONSES OVERALL |
| Material Thickness | 0.026 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN |
| Panel Thickness | 0.025 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN |
| Specification/standard Data | 80205-NAS395 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Mating Member Diameter Accommodated | 0.164 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE AND CHROMATE ZINC OVERALL |
| Nut Style | SHEET SPRING |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 406 373 | Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company (USA) |
| Reference | Meaning |
|---|---|
| NAS395-17-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-211-3439 is a Nut,sheet Spring, manufactured by Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-211-3439 has 1 manufacturer part number on file: 406 373 (Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company).
2 possible matches (shared part number, not a government interchangeability claim): 5950-01-177-3240, 6620-01-208-0235. Verify interchangeability with system specifications before substitution.
Key specifications for 406 373: Nut Width: 0.500 INCHES NOMINAL IN; Nut Length: 0.778 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-P-6889,TY 1 MIL SPEC ALL TREATMENT RESPONSES OVERALL; Material Thickness: 0.026 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN. 10 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.