The Retainer,nut and Bolt, cataloged under National Stock Number 5340-01-127-8901, 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 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-127-8901 |
| Primary Part Number | ST3M442-4D |
| 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 | 0.310 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Style Designator | ANCHOR |
| Material Document and Classification | AMS 5732,COMP 660 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Material Thickness | 0.029 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN |
| Center to Center Distance Between Cup and Mounting Hole | 0.495 INCHES MINIMUM AND 0.505 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 |
|---|---|
| ST3M442-4D PRIMARY | The Boeing Company Div Defense (USA) |
| F49251-4FB | Howmet Global Fastening Systems Inc (USA) |
| BFN442-4RT | Bristol Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| NS202042-1-048 | 5/2 Secondary reference U.S. Government activity |
| F18427-04 | 5/9 Secondary reference Harvard Industries Inc |
| 10112529 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5340-01-127-8901 is a Retainer,nut and Bolt, manufactured by The Boeing Company Div Defense, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-127-8901 has 3 manufacturer part numbers on file: ST3M442-4D (The Boeing Company Div Defense), F49251-4FB (Howmet Global Fastening Systems Inc), BFN442-4RT (Bristol Industries, Llc).
Key specifications for ST3M442-4D: Distance Between Mounting Hole Centers: 0.310 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN; Style Designator: ANCHOR; Material Document and Classification: AMS 5732,COMP 660 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE; Mounting Hole Diameter: 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN. 8 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.