The Clamp,block,section, cataloged under National Stock Number 5340-01-477-5905, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Sonfarrel Inc.. Government technical data includes 13 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 | 5340-01-477-5905 |
| Primary Part Number | ST9M591-4P |
| Item Name | Clamp,block,section |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Sonfarrel Inc. |
| Status | ACTIVE |
| Clamping Hole Quantity | 2 |
| Surface Treatment Document and Classification | FED-STD-595 FED STD ALL TREATMENT RESPONSES |
| Block Height | 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Style Designator | RECTANGULAR |
| Material Document and Classification | QQ-A-200/8 FED STD ALL MATERIAL RESPONSES |
| Clamping Hole Diameter | 0.266 INCHES NOMINAL ALL HOLES IN |
| Center to Center Distance Between First and Sixth Clamping Holes | 1.030 INCHES NOMINAL IN |
| Cable Diameter for Which Designed | 0.250 INCHES NOMINAL ALL HOLES IN |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN |
| Mounting Facility | CLAMPCLAMP |
| Surface Treatment | PRIMER |
| 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 |
|---|---|
| ST9M591-4P PRIMARY | Sonfarrel Inc. (USA) |
| ST9M591-4P PRIMARY | Harlow Aerostructures, Llc (USA) |
| ST9M591-4P | The Boeing Company Div Defense (USA) |
NSN 5340-01-477-5905 is a Clamp,block,section, manufactured by Sonfarrel Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-477-5905 has 3 manufacturer part numbers on file: ST9M591-4P (Sonfarrel Inc.), ST9M591-4P (Harlow Aerostructures, Llc), ST9M591-4P (The Boeing Company Div Defense).
Key specifications for ST9M591-4P: Clamping Hole Quantity: 2; Surface Treatment Document and Classification: FED-STD-595 FED STD ALL TREATMENT RESPONSES; Block Height: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN; Criticality Code Justification: AGAV. 13 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.