The Retainer,nut and Bolt, cataloged under National Stock Number 5340-01-066-9642, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-066-9642 |
| Primary Part Number | ST3M439-8M |
| Item Name | Retainer,nut and Bolt |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Distance Between Mounting Hole Centers | 1.248 INCHES MINIMUM AND 1.252 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.130 INCHES NOMINAL IN |
| Material Thickness | 0.078 INCHES NOMINAL IN |
| Center to Center Distance Between Cup and Mounting Hole | 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE |
| Material | IRON ALLOY 660 |
| 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 |
|---|---|
| ST3M439-8M | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| NS202004S080 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-066-9642 is a Retainer,nut and Bolt, manufactured by The Boeing Company Div Defense, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-066-9642 has 1 manufacturer part number on file: ST3M439-8M (The Boeing Company Div Defense).
Key specifications for ST3M439-8M: Overall Height: 0.410 INCHES MAXIMUM IN; Distance Between Mounting Hole Centers: 1.248 INCHES MINIMUM AND 1.252 INCHES MAXIMUM IN; Material Document and Classification: AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE; Mounting Hole Diameter: 0.130 INCHES NOMINAL IN. 7 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.