The Key,machine, cataloged under National Stock Number 5315-00-816-6331, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-00-816-6331 |
| Primary Part Number | 10888220 |
| Item Name | Key,machine |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Key Chamfer Angle | 45.0 DEGREES NOMINAL |
| Mounting Hole Type and Quantity | 1 UNTHREADED-COUNTERBORED |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Starting Edge Shape | CHAMFERED |
| Style Designator | PLAIN |
| Mounting Hole Diameter | 0.218 INCHES MINIMUM AND 0.228 INCHES MAXIMUM IN |
| Distance From Mounting Hole Center to End | 0.937 INCHES NOMINAL IN |
| Counterbore Depth | 0.250 INCHES NOMINAL IN |
| Key Chamfer Length | 0.031 INCHES NOMINAL IN |
| Counterbore Diameter | 0.343 INCHES NOMINAL IN |
| Mounting Hole Depth | 0.500 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE ZINC OVERALL |
| Material | STEEL COMP 1340 AND STEEL COMP 4140 AND STEEL COMP 5140 AND STEEL COMP 6150 OVERALL |
| 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 |
|---|---|
| 10888220 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 10888220 | 5/9 Secondary reference Army, United States Department of the Dba Rock Island Arsenal Jmtc |
NSN 5315-00-816-6331 is a Key,machine, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-00-816-6331 has 1 manufacturer part number on file: 10888220 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 10888220: Overall Height: 0.500 INCHES NOMINAL IN; Key Chamfer Angle: 45.0 DEGREES NOMINAL; Mounting Hole Type and Quantity: 1 UNTHREADED-COUNTERBORED; Hardness Rating: 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL. 13 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.