The Lock,valve Spring Retainer, cataloged under National Stock Number 2805-00-962-8431, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-962-8431 |
| Primary Part Number | 634985 |
| Item Name | Lock,valve Spring Retainer |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| First Ridge Radius | 0.170 INCHES NOMINAL IN |
| Minimum Inside Diameter | 0.344 INCHES IN |
| Thread Provision | UNTHREADED |
| Distance From Bottom to First Ridge Center | 0.187 INCHES NOMINAL IN |
| Largest Outside Diameter | 0.545 INCHES NOMINAL IN |
| First Ridge Width | 0.055 INCHES NOMINAL IN |
| Largest Inside Diameter | 0.400 INCHES NOMINAL IN |
| Inside Included Angle in Deg | 92.0 |
| Style Designator | INVERTED TAPERED BORE |
| Distance Between First and Second Ridge Centers | 0.105 INCHES NOMINAL IN |
| Outside Included Angle in Deg | 20.0 |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | STEEL |
| Second Ridge Radius | 0.170 INCHES NOMINAL 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 |
|---|---|
| 634985 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 634985 | 5/9 Secondary reference Towmotor Corp Dallas Plant Sub of Caterpillar Tractor Co |
NSN 2805-00-962-8431 is a Lock,valve Spring Retainer, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-962-8431 has 1 manufacturer part number on file: 634985 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 634985: Overall Height: 0.370 INCHES NOMINAL IN; First Ridge Radius: 0.170 INCHES NOMINAL IN; Minimum Inside Diameter: 0.344 INCHES IN; Thread Provision: UNTHREADED. 14 specifications are 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.