The Washer,lock, cataloged under National Stock Number 5310-00-017-8556, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Chrysler Realty Company Llc Dba Daimler Chrysler. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-017-8556 |
| Primary Part Number | 178556 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Chrysler Realty Company Llc Dba Daimler Chrysler |
| Status | ACTIVE |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| Style Designator | FLAT EXTERNAL AND INTERNAL TEETH |
| Material Document and Classification | -QQ-S-633 CANC FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 1.045 INCHES MINIMUM AND 1.070 INCHES MAXIMUM IN |
| Material Thickness | 0.042 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Material | STEEL COMP 1060 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL |
| Hole Diameter | 0.384 INCHES MINIMUM AND 0.398 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 |
|---|---|
| 178556 PRIMARY | Chrysler Realty Company Llc Dba Daimler Chrysler (USA) |
| 178556 | Army Weapons Command Attn Amswe-Ree-S (USA) |
| Reference | Meaning |
|---|---|
| 178556 | 5/9 Secondary reference General Motors Corp |
| 178556 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 38766 | 5/9 Secondary reference Compair Kellogg Div of Robertshaw Controls Co |
| 178556 | 5/9 Secondary reference Diamond Reo Truck Co |
NSN 5310-00-017-8556 is a Washer,lock, manufactured by Chrysler Realty Company Llc Dba Daimler Chrysler, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-017-8556 has 2 manufacturer part numbers on file: 178556 (Chrysler Realty Company Llc Dba Daimler Chrysler), 178556 (Army Weapons Command Attn Amswe-Ree-S).
3 possible matches (shared part number, not a government interchangeability claim): 5961-00-022-7414, 5340-01-314-1311, 5305-01-651-0094. Verify interchangeability with system specifications before substitution.
Key specifications for 178556: Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Style Designator: FLAT EXTERNAL AND INTERNAL TEETH; Material Document and Classification: -QQ-S-633 CANC FED SPEC ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 1.045 INCHES MINIMUM AND 1.070 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.