The Hub,fire Pump Drive Clutch, cataloged under National Stock Number 4210-00-217-3452, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is W S Darley & Co. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4210-00-217-3452 |
| Primary Part Number | 2401601 |
| Item Name | Hub,fire Pump Drive Clutch |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Manufacturer | W S Darley & Co |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,CYLINDRICAL SHAPE,2.678/2.679 IN.BODY OD,0.087 IN.W FLANGE EXTENDING OD TO 2.875 IN.,CENTER THRU BORE 1.3792/1.3797 IN.ID,BORE LG 1.516 IN.,1-0.250 IN.HOLE DRILLED FROM OUTSIDE DIA TO BORE,0.625 IN. FROM UNFLANGED END TO HOLE CENTER,THIS HOLE COUNTER BORED 0.391 IN.DIA 0.266 IN.DEEP,1 KEYWAY 0.188 IN.W,0.094 IN.DEEP,1.516 IN. LG,2 DRILLED HOLES 180 DEG APART ON 1.938 IN.BC 0.500 IN.DEEP,TAP 1/4-14 ON FLANGED END OF HUB,3 EQUAL SPACED SQUARED NOTCHES 0.500 IN.W,0.156 IN.DEEP,1.516 IN.LG ON OUTER SURFACE 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 |
|---|---|
| 2401601 PRIMARY | W S Darley & Co (USA) |
| Reference | Meaning |
|---|---|
| 153KFF | 5/9 Secondary reference W S Darley & Co |
| 556153KFF | 5/2 Secondary reference U.S. Government activity |
| 153J38-1 | 5/9 Secondary reference W S Darley & Co |
| J38-1 | 5/9 Secondary reference W S Darley & Co |
| PB153 | 5/9 Secondary reference U.S. Government activity |
NSN 4210-00-217-3452 is a Hub,fire Pump Drive Clutch, manufactured by W S Darley & Co, classified under FSC 4210, Firefighting Equipment. Status: active.
NSN 4210-00-217-3452 has 1 manufacturer part number on file: 2401601 (W S Darley & Co).
1 possible match (shared part number, not a government interchangeability claim): 6625-01-570-4136. Verify interchangeability with system specifications before substitution.
Key specifications for 2401601: General Characteristics Item Description: STEEL,CYLINDRICAL SHAPE,2.678/2.679 IN.BODY OD,0.087 IN.W FLANGE EXTENDING OD TO 2.875 IN.,CENTER THRU BORE 1.3792/1.3797 IN.ID,BORE LG 1.516 IN.,1-0.250 IN.HOLE DRILLED FROM OUTSIDE DIA TO BORE,0.625 IN. FROM UNFLANGED END TO HOLE CENTER,THIS HOLE COUNTER BORED 0.391 IN.DIA 0.266 IN.DEEP,1 KEYWAY 0.188 IN.W,0.094 IN.DEEP,1.516 IN. LG,2 DRILLED HOLES 180 DEG APART ON 1.938 IN.BC 0.500 IN.DEEP,TAP 1/4-14 ON FLANGED END OF HUB,3 EQUAL SPACED SQUARED NOTCHES 0.500 IN.W,0.156 IN.DEEP,1.516 IN.LG ON OUTER SURFACE IN; End Item Identification: TRUCK,FIRE FIGHTING,POWERED PUMPER CLASS 530A A. 1 specification is 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.