The Washer,flat, cataloged under National Stock Number 5310-01-147-4913, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bivar Inc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-147-4913 |
| Primary Part Number | 901-020 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bivar Inc |
| Status | ACTIVE |
| Overall Diameter | 0.085 INCHES NOMINAL IN |
| Material Document and Classification | ASTM D4066 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 | 0.028 INCHES NOMINAL IN |
| Thickness | 0.020 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 |
| Part Number | Manufacturer |
|---|---|
| 901-020 PRIMARY | Bivar Inc (USA) |
| Reference | Meaning |
|---|---|
| C11997-0001 | 7/2 Vendor item drawing reference Rosemount Aerospace Inc Dba Rosemount Aerospace Inc |
| C11997-0001 | 5/9 Secondary reference Rosemount Inc Dba Fisher Rosemount Service and Support |
| 10109815 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-147-4913 is a Washer,flat, manufactured by Bivar Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-147-4913 has 1 manufacturer part number on file: 901-020 (Bivar Inc).
1 possible match (shared part number, not a government interchangeability claim): 6920-01-554-6046. Verify interchangeability with system specifications before substitution.
Key specifications for 901-020: Overall Diameter: 0.085 INCHES NOMINAL IN; Material Document and Classification: ASTM D4066 ASSN STD 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.