The Washer,flat, cataloged under National Stock Number 5310-01-100-0632, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-100-0632 |
| Primary Part Number | 52660-300 ITEM NO. 20CP |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Overall Diameter | 0.348 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | AMS36518 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.242 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Thickness | 0.048 INCHES MINIMUM AND 0.052 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 | S |
| Part Number | Manufacturer |
|---|---|
| 52660-300 ITEM NO. 20CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 32582CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 32582 | 3/1 Design control — primary reference U.S. Government activity |
| 52660-300 ITEM NO. 20 | 5/1 Secondary reference U.S. Government activity |
NSN 5310-01-100-0632 is a Washer,flat, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-100-0632 has 2 manufacturer part numbers on file: 52660-300 ITEM NO. 20CP (Naval Inventory Control Point Mechanicsburg), 32582CP (Naval Inventory Control Point Mechanicsburg).
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-244-0101, 3010-01-295-6035, 5340-01-541-3323. Verify interchangeability with system specifications before substitution.
Key specifications for 52660-300 ITEM NO. 20CP: Overall Diameter: 0.348 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN; Criticality Code Justification: ZZZY; Material Document and Classification: AMS36518 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 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.