The Washer,flat, cataloged under National Stock Number 5310-01-270-1745, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bruce Aerospace 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-270-1745 |
| Primary Part Number | 1400203 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bruce Aerospace Inc |
| Status | ACTIVE |
| Overall Diameter | 0.505 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN |
| Material Document and Classification | L-P-410 6/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Thickness | 0.090 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 |
|---|---|
| 1400203 | Bruce Aerospace Inc (USA) |
| Reference | Meaning |
|---|---|
| 5610-61-90 | 3/2 Design control — primary reference U.S. Government activity |
| 2605256-40 | 7/2 Vendor item drawing reference Alliant Techsystems Operations Llc Div Defense Electronic Systems |
NSN 5310-01-270-1745 is a Washer,flat, manufactured by Bruce Aerospace Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-270-1745 has 1 manufacturer part number on file: 1400203 (Bruce Aerospace Inc).
1 possible match (shared part number, not a government interchangeability claim): 3990-01-287-7200. Verify interchangeability with system specifications before substitution.
Key specifications for 1400203: Overall Diameter: 0.505 INCHES MINIMUM AND 0.525 INCHES MAXIMUM IN; Material Document and Classification: L-P-410 6/6 FED 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.