The Washer,flat, cataloged under National Stock Number 5310-01-444-2971, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Div Marine Systems. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-444-2971 |
| Primary Part Number | 3387C25H03 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation Div Marine Systems |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35, TY2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.495 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN |
| Material Document and Classification | AISI 303 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 303 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.740 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN |
| Thickness | 0.120 INCHES MINIMUM AND 0.130 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 |
|---|---|
| 3387C25H03 PRIMARY | Northrop Grumman Systems Corporation Div Marine Systems (USA) |
| Reference | Meaning |
|---|---|
| 3387C25H03 | 5/9 Secondary reference Dynatherm Corp |
NSN 5310-01-444-2971 is a Washer,flat, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-444-2971 has 1 manufacturer part number on file: 3387C25H03 (Northrop Grumman Systems Corporation Div Marine Systems).
Key specifications for 3387C25H03: Surface Treatment Document and Classification: QQ-P-35, TY2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.495 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN; Material Document and Classification: AISI 303 ASSN 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.