The Washer,flat, cataloged under National Stock Number 5310-01-133-8643, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 9 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-133-8643 |
| Primary Part Number | 4M27C3 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Overall Diameter | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5059,TYPE 302 COND A MIL SPEC 1ST MATERIAL RESPONSE OR QQ-S-763,CLASS 302 COND A FED SPEC 2ND MATERIAL RESPONSE OR MIL-T-8506 MIL SPEC 3RD MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 302 OR STEEL COMP 304 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.097 INCHES MINIMUM AND 0.107 INCHES MAXIMUM IN |
| Thickness | 0.029 INCHES MINIMUM AND 0.035 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 |
|---|---|
| 4M27C3 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 54M27C3 | 5/9 Secondary reference U.S. Government activity |
| 4M27C3 | 5/9 Secondary reference U.S. Government activity |
| 4M27C3 | 5/9 Secondary reference Tect Hypervelocity, Inc. |
| 4M27C3 | 5/9 Secondary reference Pioneer Machine Products Inc. |
| 4M27C3 | 5/9 Secondary reference Anillo Industries Llc |
| 4M27C3 | 5/9 Secondary reference All Power Manufacturing Co. |
| 10109695 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-133-8643 is a Washer,flat, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-133-8643 has 1 manufacturer part number on file: 4M27C3 (The Boeing Company Div Defense).
Key specifications for 4M27C3: Overall Diameter: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-5059,TYPE 302 COND A MIL SPEC 1ST MATERIAL RESPONSE OR QQ-S-763,CLASS 302 COND A FED SPEC 2ND MATERIAL RESPONSE OR MIL-T-8506 MIL SPEC 3RD MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PASSIVATE OVERALL. 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.