The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-586-8651, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 — Screws (FSG 53) |
| Manufacturers | Fastenal Company Dba Fastenal Co (CAGE 0Y3H3); Oshkosh Defense Llc (CAGE 75Q65); The American Society of Mechanical Engineers (CAGE 05047) |
| Parameter | Value |
|---|---|
| NSN | 5305-01-586-8651 |
| Primary Part Number | AES43M40750MBC4L91 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| 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 |
|---|---|
| 39521 | Fastenal Company Dba Fastenal Co (USA) |
| 3557078007 | Oshkosh Defense Llc (USA) |
| AES43M40750MBC4L91 PRIMARY | The American Society of Mechanical Engineers (USA) |
| 12759-00979 PRIMARY | Fastenal Company Dba Fastenal Co (USA) |
| Reference | Meaning |
|---|---|
| ASME B18.3.1M | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
| 3557078 | D/9 Drawing number reference only Oshkosh Corp |
| 3557075 | 5/9 Secondary reference Oshkosh Corp |
| 3557078007 | 5/9 Secondary reference Oshkosh Corp |
NSN 5305-01-586-8651 is a Screw,cap,socket Head, manufactured by The American Society of Mechanical Engineers, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-586-8651 has 4 manufacturer part numbers on file: 39521 (Fastenal Company Dba Fastenal Co), 3557078007 (Oshkosh Defense Llc), AES43M40750MBC4L91 (The American Society of Mechanical Engineers), 12759-00979 (Fastenal Company Dba Fastenal Co).
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-586-8652, 5305-01-646-1641. Verify interchangeability with system specifications before substitution.
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.