The Cover,access, cataloged under National Stock Number 5340-00-390-2471, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-390-2471 |
| Primary Part Number | AFB227B |
| Item Name | Cover,access |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Flange Thickness | 0.250 INCHES NOMINAL IN |
| Bolt Circle Hole Quantity | 6 |
| First Recess Inside Height | 1.125 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | CIRCULAR RECESS |
| Outside Diameter | 7.750 INCHES NOMINAL IN |
| Securing Device Type | THREADED FASTENER |
| Inside Diameter | 5.125 INCHES NOMINAL IN |
| Bolt Circle Diameter | 6.875 INCHES NOMINAL IN |
| Peripheral Shape Style | ROUND, MULTI HOLES |
| Material | STEEL |
| Body Thickness | 0.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| AFB227B PRIMARY | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| MAFB225BPC6 | 5/9 Secondary reference U.S. Government activity |
| AFB227B | 3/9 Design control — primary reference U.S. Government activity |
NSN 5340-00-390-2471 is a Cover,access, manufactured by Fairbanks Morse, Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-390-2471 has 1 manufacturer part number on file: AFB227B (Fairbanks Morse, Llc).
Key specifications for AFB227B: Flange Thickness: 0.250 INCHES NOMINAL IN; Bolt Circle Hole Quantity: 6; First Recess Inside Height: 1.125 INCHES NOMINAL IN; Cross-Sectional Shape Style: CIRCULAR RECESS. 11 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.