The Washer,flat, cataloged under National Stock Number 5310-01-554-4432, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-554-4432 |
| Primary Part Number | 91455A150 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Overall Diameter | 24.0 MILLIMETERS NOMINAL MM |
| Hardness Rating | 90.0 ROCKWELL B MINIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 13.0 MILLIMETERS NOMINAL MM |
| Thickness | 2.3 MILLIMETERS MINIMUM AND 2.7 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| GD01010861 | General Dynamics United Kingdom Ltd (GBR) |
| 91455A150 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5310-01-554-4432 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-554-4432 has 2 manufacturer part numbers on file: GD01010861 (General Dynamics United Kingdom Ltd), 91455A150 (Mcmaster-Carr Supply Co).
Key specifications for 91455A150: Overall Diameter: 24.0 MILLIMETERS NOMINAL MM; Hardness Rating: 90.0 ROCKWELL B MINIMUM; Cross-Sectional Shape Style: RECTANGULAR; Special Features: FOR M12 SCREW SIZE. 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.