The Washer,spring Tension, cataloged under National Stock Number 5310-00-021-9105, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Unison Industries Llc. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-021-9105 |
| Primary Part Number | 10-166724-6 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Unison Industries Llc |
| Status | ACTIVE |
| Style Designator | SPRING TENSION |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.415 INCHES MINIMUM AND 0.443 INCHES MAXIMUM IN |
| Material Thickness | 0.011 INCHES MINIMUM AND 0.013 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 250 POUNDS PER SQUARE INCH LBS |
| Hole Diameter | 0.295 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 10-166724-6 PRIMARY | Unison Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 10-166724-6 | 5/9 Secondary reference Amphenol Corp Div Amphenol Aerospace Operations |
NSN 5310-00-021-9105 is a Washer,spring Tension, manufactured by Unison Industries Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-021-9105 has 1 manufacturer part number on file: 10-166724-6 (Unison Industries Llc).
Key specifications for 10-166724-6: Overall Height: 0.094 INCHES NOMINAL IN; Style Designator: SPRING TENSION; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.415 INCHES MINIMUM AND 0.443 INCHES MAXIMUM IN. 6 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.