The Bellows,protection, cataloged under National Stock Number 5340-00-202-2177, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5340-00-202-2177 |
| Primary Part Number | 7631991 |
| Item Name | Bellows,protection |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Mounting Hole Quantity | 8 |
| Large End Outside Length | 0.210 INCHES NOMINAL IN |
| Large End Inside Diameter | 2.000 INCHES NOMINAL IN |
| Large End Outside Diameter | 2.750 INCHES NOMINAL IN |
| Small End Outside Diameter | 2.250 INCHES NOMINAL IN |
| Material Document and Classification | MIL-STD-417, TYPE R, CLASS RS, GRADE 410A1BF2 MIL STD SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Neutral Length | 3.250 INCHES NOMINAL IN |
| Features Provided | FLANGED BASE |
| Large End Inside Length | 0.250 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC |
| Durometer Hardness Rating | 35.0 MINIMUM AND 45.0 MAXIMUM |
| Thickness | 0.040 INCHES MINIMUM AND 0.045 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 |
| Part Number | Manufacturer |
|---|---|
| 7631991 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| Reference | Meaning |
|---|---|
| MILR3065 | 4/1 Identification reference U.S. Government activity |
NSN 5340-00-202-2177 is a Bellows,protection, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-202-2177 has 1 manufacturer part number on file: 7631991 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
1 possible match (shared part number, not a government interchangeability claim): 6615-01-127-4273. Verify interchangeability with system specifications before substitution.
Key specifications for 7631991: Mounting Hole Quantity: 8; Large End Outside Length: 0.210 INCHES NOMINAL IN; Large End Inside Diameter: 2.000 INCHES NOMINAL IN; Large End Outside Diameter: 2.750 INCHES NOMINAL 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.