The Washer,flat, cataloged under National Stock Number 5310-01-429-1038, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Williams Aerospace & Manufacturing Inc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-429-1038 |
| Primary Part Number | 98897 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Williams Aerospace & Manufacturing Inc |
| Status | ACTIVE |
| Overall Diameter | 3.730 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-7952 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1020 OR STEEL COMP 1025 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 2.520 INCHES NOMINAL IN |
| Thickness | 0.071 INCHES NOMINAL 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 |
|---|---|
| 98897 | Williams Aerospace & Manufacturing Inc (USA) |
| 98897 | American Valley Aviation, Inc. Dba American Valley Aviation Inc (USA) |
| Reference | Meaning |
|---|---|
| 98897 | 5/9 Secondary reference Aero Engineering & Manufacturing Company of California, Llc Dba Aeroengineering & Manufacturing Co |
| 3330585-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-429-1038 is a Washer,flat, manufactured by Williams Aerospace & Manufacturing Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-429-1038 has 2 manufacturer part numbers on file: 98897 (Williams Aerospace & Manufacturing Inc), 98897 (American Valley Aviation, Inc. Dba American Valley Aviation Inc).
Key specifications for 98897: Overall Diameter: 3.730 INCHES NOMINAL IN; Material Document and Classification: MIL-S-7952 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 8 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.