The Washer,flat, cataloged under National Stock Number 5310-00-251-0799, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Textron Aviation Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-251-0799 |
| Primary Part Number | S1438-2 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Textron Aviation Inc |
| Status | ACTIVE |
| Overall Diameter | 0.720 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN |
| Material Document and Classification | ZYTEL 101,FSCM 71379 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.193 INCHES MINIMUM AND 0.213 INCHES MAXIMUM IN |
| Thickness | 0.030 INCHES MINIMUM AND 0.040 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 |
|---|---|
| S1438-2 PRIMARY | Textron Aviation Inc (USA) |
| Reference | Meaning |
|---|---|
| S1438-2 | 3/9 Design control — primary reference Cessna Aircraft Company Dba Textron Aviation |
NSN 5310-00-251-0799 is a Washer,flat, manufactured by Textron Aviation Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-251-0799 has 1 manufacturer part number on file: S1438-2 (Textron Aviation Inc).
1 possible match (shared part number, not a government interchangeability claim): 6130-01-605-7640. Verify interchangeability with system specifications before substitution.
Key specifications for S1438-2: Overall Diameter: 0.720 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN; Material Document and Classification: ZYTEL 101,FSCM 71379 MFR REF 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.