The Washer,keyway, cataloged under National Stock Number 5310-00-916-2188, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Army, United States Department of the Dba Watervliet Arsenal Div Business Development. Government technical data includes 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-916-2188 |
| Primary Part Number | 7986520 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Army, United States Department of the Dba Watervliet Arsenal Div Business Development |
| Status | ACTIVE |
| Distance From Centerline to Bottom of Internal Keyway | 0.905 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN |
| Internal Keyway Width | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-13924 CL 1 MIL SPEC 1ST TREATMENT RESPONSE OR AMS 2485 ASSN STD 2ND TREATMENT RESPONSE OVERALL |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OR AMS 6415 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.070 INCHES MINIMUM AND 2.090 INCHES MAXIMUM IN |
| Internal Keyway Quantity | 1 |
| Material Thickness | 0.124 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE FILM OVERALL |
| Material | STEEL COMP 4340 OVERALL |
| Hole Diameter | 1.630 INCHES MINIMUM AND 1.640 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 |
|---|---|
| 7986520 PRIMARY | Army, United States Department of the Dba Watervliet Arsenal Div Business Development (USA) |
NSN 5310-00-916-2188 is a Washer,keyway, manufactured by Army, United States Department of the Dba Watervliet Arsenal Div Business Development, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-916-2188 has 1 manufacturer part number on file: 7986520 (Army, United States Department of the Dba Watervliet Arsenal Div Business Development).
Key specifications for 7986520: Distance From Centerline to Bottom of Internal Keyway: 0.905 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN; Internal Keyway Width: 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-13924 CL 1 MIL SPEC 1ST TREATMENT RESPONSE OR AMS 2485 ASSN STD 2ND TREATMENT RESPONSE OVERALL; Hardness Rating: 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM. 11 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.