The Clamp,block, cataloged under National Stock Number 5340-01-705-7121, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-705-7121 |
| Primary Part Number | NGC500EG-3B1 |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Mounting Hole Quantity | 2 |
| Clamping Hole Quantity | 2 |
| Distance From End to First Clamping Hole Center | 1.206 INCHES MINIMUM AND 1.226 INCHES MAXIMUM IN |
| Block Height | 0.502 INCHES MINIMUM AND 0.522 INCHES MAXIMUM IN |
| Style Designator | RECTANGULAR |
| Material Document and Classification | ASTM D4086, PA12630 ASSN STD SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.205 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN |
| Distance From Center of Mounting Hole to Edge Along the Width | 0.187 INCHES MINIMUM AND 0.207 INCHES MAXIMUM IN |
| Distance From End to First Mounting Hole Center | 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN |
| Mounting Facility | UNTHREADED HOLE(S) |
| Center to Center Distance Between First and Second Mounting Holes | 1.614 INCHES MINIMUM AND 1.634 INCHES MAXIMUM IN |
| Material | PLASTIC |
| Center to Center Distance Between First and Second Clamping Holes | 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN |
| 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 |
|---|---|
| NGC500EG-3B1 | Swan Industries, Inc (USA) |
| NGC500EG-3B1 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| NGC500EG-3B1 | Upland Fab, Inc. Dba Upland Fab Inc (USA) |
| Reference | Meaning |
|---|---|
| NGC500EG | D/9 Drawing number reference only Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
NSN 5340-01-705-7121 is a Clamp,block, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-705-7121 has 3 manufacturer part numbers on file: NGC500EG-3B1 (Swan Industries, Inc), NGC500EG-3B1 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), NGC500EG-3B1 (Upland Fab, Inc. Dba Upland Fab Inc).
Key specifications for NGC500EG-3B1: Mounting Hole Quantity: 2; Clamping Hole Quantity: 2; Distance From End to First Clamping Hole Center: 1.206 INCHES MINIMUM AND 1.226 INCHES MAXIMUM IN; Block Height: 0.502 INCHES MINIMUM AND 0.522 INCHES MAXIMUM IN. 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.