The Washer,lock, cataloged under National Stock Number 5310-01-364-9181, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ward Leonard Ct Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-364-9181 |
| Primary Part Number | N418P140 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ward Leonard Ct Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B633 TY 2 CL FE/ZN13 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | FF-W-84 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.737 INCHES MAXIMUM IN |
| Material Thickness | 0.172 INCHES MINIMUM IN |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.509 INCHES MINIMUM AND 0.523 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 |
|---|---|
| N418P140 PRIMARY | Ward Leonard Ct Llc (USA) |
| Reference | Meaning |
|---|---|
| 04-0002 ITEM 68 | 5/9 Secondary reference Ward Leonard Ct Llc |
| SPP51-0358 | 3/9 Design control — primary reference Ward Leonard Ct Llc |
NSN 5310-01-364-9181 is a Washer,lock, manufactured by Ward Leonard Ct Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-364-9181 has 1 manufacturer part number on file: N418P140 (Ward Leonard Ct Llc).
Key specifications for N418P140: Surface Treatment Document and Classification: ASTM B633 TY 2 CL FE/ZN13 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: FF-W-84 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.737 INCHES MAXIMUM IN. 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.