The Housing,flywheel, cataloged under National Stock Number 4310-00-628-2605, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-00-628-2605 |
| Primary Part Number | B3516 |
| Item Name | Housing,flywheel |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
| Status | ACTIVE |
| Material | IRON CAST AND STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| B3516 PRIMARY | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA) |
| Reference | Meaning |
|---|---|
| A4025 | 5/9 Secondary reference Chicago Pneumatic Tool Co |
| A4220 | 5/9 Secondary reference Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
NSN 4310-00-628-2605 is a Housing,flywheel, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-628-2605 has 1 manufacturer part number on file: B3516 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).
3 possible matches (shared part number, not a government interchangeability claim): 2930-01-066-8998, 5340-01-398-2946, 5330-01-630-7695. Verify interchangeability with system specifications before substitution.
Key specifications for B3516: Special Features: CIRCULAR BORE W/KEYWAY;BORE ID 1.750 IN.;KEYWAY WD 0.375 IN.,LG 2.945 IN.;4 RADIATING ATTACHMENT ARMS IN; Material: IRON CAST AND STEEL. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.