The Washer,flat, cataloged under National Stock Number 5310-00-787-3786, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is General Electric Company. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-787-3786 |
| Primary Part Number | 37B200378P102 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES OUTER |
| Surface Finish | 63.0 MICROINCHES TOP |
| Overall Diameter | 1.170 INCHES MINIMUM AND 1.175 INCHES MAXIMUM IN |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 6415 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE FILM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 4340 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.860 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN |
| Thickness | 0.080 INCHES MINIMUM AND 0.100 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 |
|---|---|
| 37B200378P102 | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 37B200378P102 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-787-3786 is a Washer,flat, manufactured by General Electric Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-787-3786 has 1 manufacturer part number on file: 37B200378P102 (General Electric Company).
1 possible match (shared part number, not a government interchangeability claim): 5310-00-857-5266. Verify interchangeability with system specifications before substitution.
Key specifications for 37B200378P102: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES OUTER; Surface Finish: 63.0 MICROINCHES TOP; Overall Diameter: 1.170 INCHES MINIMUM AND 1.175 INCHES MAXIMUM IN. 14 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.