The Board Stiffener, cataloged under National Stock Number 5340-01-100-4964, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Smiths Aerospace, Inc., Electronic Systems-Grand Rapids. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-01-100-4964 |
| Primary Part Number | 21212 |
| Item Name | Board Stiffener |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL AL ALLOY 2024-T351,FINISH CHEM FILM MIL-C-5541 CL 1A; LG 6.995 IN. NOM; WIDTH 0.250 IN. NOM; 4 HOLES ALONG LG 2/0.086/-56 UNC-2B; 4/0.112/-40 UNC-2B X .31 FULL THD BOTH ENDS A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21212 PRIMARY | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA) |
| Reference | Meaning |
|---|---|
| 21212E | 5/9 Secondary reference Smiths Aerospace, Inc., Electronic Systems-Grand Rapids |
NSN 5340-01-100-4964 is a Board Stiffener, manufactured by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-100-4964 has 1 manufacturer part number on file: 21212 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids).
Key specifications for 21212: General Characteristics Item Description: MATERIAL AL ALLOY 2024-T351,FINISH CHEM FILM MIL-C-5541 CL 1A; LG 6.995 IN. NOM; WIDTH 0.250 IN. NOM; 4 HOLES ALONG LG 2/0.086/-56 UNC-2B; 4/0.112/-40 UNC-2B X .31 FULL THD BOTH ENDS A. 1 specification is 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.