The Washer,flat, cataloged under National Stock Number 5310-01-527-5173, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-527-5173 |
| Primary Part Number | NAS1149C1165B |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-13924 MIL SPEC ALL TREATMENT RESPONSES OVERALL |
| Overall Diameter | 2.370 INCHES MINIMUM AND 2.395 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Specification/standard Data | 18876-NAS1149 MANUFACTURERS STANDARD |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.630 INCHES MINIMUM AND 1.650 INCHES MAXIMUM IN |
| Thickness | 0.016 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 |
|---|---|
| NAS1149C1165B PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| AN960XC11 | 5/9 Secondary reference Us Army Aviation and Missile Command |
NSN 5310-01-527-5173 is a Washer,flat, manufactured by Us Army Aviation and Missile Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-527-5173 has 1 manufacturer part number on file: NAS1149C1165B (Us Army Aviation and Missile Command).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-649-1046. Verify interchangeability with system specifications before substitution.
Key specifications for NAS1149C1165B: Surface Treatment Document and Classification: MIL-C-13924 MIL SPEC ALL TREATMENT RESPONSES OVERALL; Overall Diameter: 2.370 INCHES MINIMUM AND 2.395 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 12 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.