The Washer,key, cataloged under National Stock Number 5310-00-515-9570, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mack Trucks Inc Parts Opn. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-515-9570 |
| Primary Part Number | 11BLT68A |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mack Trucks Inc Parts Opn |
| Status | ACTIVE |
| Internal Straight Key Width | 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.631 INCHES MINIMUM AND 0.651 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | SAE 1010 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.178 INCHES MINIMUM AND 2.198 INCHES MAXIMUM IN |
| Material Thickness | 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Material | STEEL COMP 1010 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 1.500 INCHES MINIMUM AND 1.562 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 |
|---|---|
| 11BLT68A PRIMARY | Mack Trucks Inc Parts Opn (USA) |
| 568514 PRIMARY | Chrysler Realty Company Llc Dba Daimler Chrysler (USA) |
| 1229C341 PRIMARY | Meritor Heavy Vehicle Systems, Llc (USA) |
| 5159570 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 90371 | 5/9 Secondary reference White Motor Corp |
| JT10555 | 5/9 Secondary reference U.S. Government activity |
| 630665 | 5/9 Secondary reference Sasco Inc Canadian Div |
| 327619 | 5/9 Secondary reference White Motor Corp |
NSN 5310-00-515-9570 is a Washer,key, manufactured by Mack Trucks Inc Parts Opn, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-515-9570 has 4 manufacturer part numbers on file: 11BLT68A (Mack Trucks Inc Parts Opn), 568514 (Chrysler Realty Company Llc Dba Daimler Chrysler), 1229C341 (Meritor Heavy Vehicle Systems, Llc), 5159570 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-049-3387. Verify interchangeability with system specifications before substitution.
Key specifications for 11BLT68A: Internal Straight Key Width: 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.631 INCHES MINIMUM AND 0.651 INCHES MAXIMUM IN; Style Designator: KEY; Material Document and Classification: SAE 1010 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 9 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.