The Washer,flat, cataloged under National Stock Number 5310-00-435-5724, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Dla Aviation Engineering Div Department of Defense. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-435-5724 |
| Primary Part Number | 88403 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Dla Aviation Engineering Div Department of Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | PS-903,FSCM 11599 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 5504 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 410 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.201 INCHES MINIMUM AND 0.207 INCHES MAXIMUM IN |
| Thickness | 0.025 INCHES MINIMUM AND 0.035 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 |
NSN 5310-00-435-5724 is a Washer,flat, manufactured by Dla Aviation Engineering Div Department of Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-435-5724 has 2 manufacturer part numbers on file: 88403 (Triumph Engine Control Systems Llc), 88403 (Dla Aviation Engineering Div Department of Defense).
Key specifications for 88403: Surface Treatment Document and Classification: PS-903,FSCM 11599 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM; Material Document and Classification: AMS 5504 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.