The Washer,lock, cataloged under National Stock Number 5310-00-209-2804, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ametek, Inc. Div Aerospace & Defense. Government technical data includes 7 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 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 | 5310-00-209-2804 |
| Primary Part Number | AH500-0 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ametek, Inc. Div Aerospace & Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | N0. 18 MFR 61349 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.225 INCHES MAXIMUM IN |
| Material Thickness | 0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL OVERALL |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.128 INCHES MINIMUM AND 0.137 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 |
|---|---|
| AH500-0 PRIMARY | Ametek, Inc. Div Aerospace & Defense (USA) |
NSN 5310-00-209-2804 is a Washer,lock, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-209-2804 has 1 manufacturer part number on file: AH500-0 (Ametek, Inc. Div Aerospace & Defense).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-501-6995. Verify interchangeability with system specifications before substitution.
Key specifications for AH500-0: Surface Treatment Document and Classification: N0. 18 MFR 61349 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.225 INCHES MAXIMUM IN; Material Thickness: 0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN. 7 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.