The Washer,spring Tension, cataloged under National Stock Number 5310-01-128-5172, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-128-5172 |
| Primary Part Number | 2493755 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Style Designator | SPRING TENSION |
| Outside Diameter | 2.095 INCHES MINIMUM AND 2.105 INCHES MAXIMUM IN |
| Material Thickness | 0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN |
| Material | STEEL COMP 1095 OVERALL |
| Hole Diameter | 1.545 INCHES MINIMUM AND 1.555 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 |
|---|---|
| 2493755 | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 2493755 | 3/2 Design control — primary reference U.S. Government activity |
| 10109491 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-128-5172 is a Washer,spring Tension, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-128-5172 has 1 manufacturer part number on file: 2493755 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
Key specifications for 2493755: Overall Height: 0.100 INCHES NOMINAL IN; Style Designator: SPRING TENSION; Outside Diameter: 2.095 INCHES MINIMUM AND 2.105 INCHES MAXIMUM IN; Material Thickness: 0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN. 5 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.