The Clamp,block, cataloged under National Stock Number 5340-01-514-8371, 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 5 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-514-8371 |
| Primary Part Number | ST9M590-4P |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Clamping Hole Quantity | 2 |
| Criticality Code Justification | AGAV |
| Style Designator | RECTANGULAR |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.250 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| ST9M590-4P | Harlow Aerostructures, Llc (USA) |
| ST9M590-4P PRIMARY | The Boeing Company Div Defense (USA) |
| ST9M590-4P | Sonfarrel Inc. (USA) |
NSN 5340-01-514-8371 is a Clamp,block, manufactured by The Boeing Company Div Defense, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-514-8371 has 3 manufacturer part numbers on file: ST9M590-4P (Harlow Aerostructures, Llc), ST9M590-4P (The Boeing Company Div Defense), ST9M590-4P (Sonfarrel Inc.).
Key specifications for ST9M590-4P: Clamping Hole Quantity: 2; Criticality Code Justification: AGAV; Style Designator: RECTANGULAR; Overall Length: 1.090 INCHES NOMINAL IN. 5 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.