The Button,plug, cataloged under National Stock Number 5340-01-331-7973, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Heyco Inc Dba Heyco Products. Government technical data includes 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-331-7973 |
| Primary Part Number | 2653 |
| Item Name | Button,plug |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Heyco Inc Dba Heyco Products |
| Status | ACTIVE |
| Head Height | 0.062 INCHES NOMINAL IN |
| Hole Accommodation Diameter | 0.562 INCHES NOMINAL IN |
| Style Designator | STANDARD |
| Material Document and Classification | ASTM D4066 ASSN STD SINGLE MATERIAL RESPONSE |
| Head Outside Diameter | 0.656 INCHES NOMINAL IN |
| Material | PLASTIC POLYAMIDE NYLON |
| 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 |
|---|---|
| 2653 PRIMARY | Heyco Inc Dba Heyco Products (USA) |
| Reference | Meaning |
|---|---|
| 3271645 | 5/9 Secondary reference Oshkosh Corp |
| 3271645 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
| MP-0985 | 5/9 Secondary reference L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications |
NSN 5340-01-331-7973 is a Button,plug, manufactured by Heyco Inc Dba Heyco Products, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-331-7973 has 1 manufacturer part number on file: 2653 (Heyco Inc Dba Heyco Products).
3 possible matches (shared part number, not a government interchangeability claim): 5935-01-397-1471, 5120-01-600-4537, 5120-01-649-0962. Verify interchangeability with system specifications before substitution.
Key specifications for 2653: Overall Height: 0.406 INCHES NOMINAL IN; Head Height: 0.062 INCHES NOMINAL IN; Hole Accommodation Diameter: 0.562 INCHES NOMINAL IN; Style Designator: STANDARD. 6 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.