The Sleeve,starter Pinion, cataloged under National Stock Number 2990-00-423-9235, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-423-9235 |
| Primary Part Number | 4B1696 |
| Item Name | Sleeve,starter Pinion |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,5.125 IN. O/A LG,2.875 IN. OD,1.750 IN. BOTTOM HOLE,2.125 IN. LG OF SLOT,0.625 IN. W,0.875 IN. DIA,3/4-14 THD,ONE HOLE 2.313 IN. DIA,SECOND HOLE 6.313 IN. DIA,THIRD HOLE 1.438 IN. DIA IN |
| 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 |
|---|---|
| 4B1696 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| IPD4B1696 | 5/9 Secondary reference Industrial Parts Depot, Llc Dba Ipd |
NSN 2990-00-423-9235 is a Sleeve,starter Pinion, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-423-9235 has 1 manufacturer part number on file: 4B1696 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 4B1696: General Characteristics Item Description: STEEL,5.125 IN. O/A LG,2.875 IN. OD,1.750 IN. BOTTOM HOLE,2.125 IN. LG OF SLOT,0.625 IN. W,0.875 IN. DIA,3/4-14 THD,ONE HOLE 2.313 IN. DIA,SECOND HOLE 6.313 IN. DIA,THIRD HOLE 1.438 IN. DIA IN. 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.