The Washer,flat, cataloged under National Stock Number 5310-01-028-3601, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-028-3601 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 1.333 INCHES NOMINAL IN |
| Material Document and Classification | MIL-P-20693 TYPE2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYHEXAMETHYLENE AMIDE OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.919 INCHES NOMINAL IN |
| Thickness | 0.062 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-S-19622/12 | 4/1 Identification reference U.S. Government activity |
| M19622-12-0018 | 2/2 Government specification standardization U.S. Government activity |
| M19622-12F0018 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-028-3601 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5365-01-145-4062, 5330-01-297-7567, 5310-01-429-9432. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-028-3601: Overall Diameter: 1.333 INCHES NOMINAL IN; Material Document and Classification: MIL-P-20693 TYPE2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 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.