The Washer,flat, cataloged under National Stock Number 5310-00-555-3909, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Vibratech Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-555-3909 |
| Primary Part Number | 627810 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Vibratech Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.530 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1020 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.191 INCHES MINIMUM AND 0.196 INCHES MAXIMUM IN |
| Thickness | 0.0269 INCHES MINIMUM AND 0.0329 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 |
|---|---|
| 627810 PRIMARY | Vibratech Inc (USA) |
| Reference | Meaning |
|---|---|
| A627810 | 3/9 Design control — primary reference Houdaille Industries Inc |
| 627810 | 5/9 Secondary reference Houdaille Industries Inc |
NSN 5310-00-555-3909 is a Washer,flat, manufactured by Vibratech Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-555-3909 has 1 manufacturer part number on file: 627810 (Vibratech Inc).
Key specifications for 627810: Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.530 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN; Material Document and Classification: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.