The Clamp,block,section, cataloged under National Stock Number 5340-01-480-4977, 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 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-480-4977 |
| Primary Part Number | ST9M593-8-1P |
| Item Name | Clamp,block,section |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Mounting Hole Quantity | 2 |
| Clamping Hole Quantity | 2 |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE II,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE |
| Criticality Code Justification | AGAV |
| Style Designator | RECTANGULAR |
| Material Document and Classification | MIL-A-21180,CLASS II,COND T61 MIL SPEC SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.332 INCHES MINIMUM AND 0.348 INCHES MAXIMUM IN |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.375 INCHES NOMINAL IN |
| Mounting Facility | UNTHREADED HOLE(S) |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY A356.0 |
| 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 |
|---|---|
| ST9M593-8-1P | Wyman-Gordan Investment Castings, Inc. Div Pcc Structurals - Aluminum Operations (USA) |
| ST9M593-8-1P PRIMARY | The Boeing Company Div Defense (USA) |
| ST9M593-8-1P PRIMARY | Pac Foundries, Inc. (USA) |
| Reference | Meaning |
|---|---|
| ST9M593-8-1P | 5/9 Secondary reference Wyman-Gordon Investment Castings, Inc. Dba Pcc Structurals Ogden, Ut - Aluminum Division |
NSN 5340-01-480-4977 is a Clamp,block,section, manufactured by The Boeing Company Div Defense, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-480-4977 has 3 manufacturer part numbers on file: ST9M593-8-1P (Wyman-Gordan Investment Castings, Inc. Div Pcc Structurals - Aluminum Operations), ST9M593-8-1P (The Boeing Company Div Defense), ST9M593-8-1P (Pac Foundries, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 1680-01-480-4995. Verify interchangeability with system specifications before substitution.
Key specifications for ST9M593-8-1P: Mounting Hole Quantity: 2; Clamping Hole Quantity: 2; Surface Treatment Document and Classification: MIL-A-8625,TYPE II,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE; Criticality Code Justification: AGAV. 11 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.