The Retainer,filter, cataloged under National Stock Number 4820-01-535-4487, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mission Systems Orchard Park Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-535-4487 |
| Primary Part Number | B40835-1 |
| Item Name | Retainer,filter |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mission Systems Orchard Park Inc |
| Status | ACTIVE |
| Overall Diameter | 0.371 INCHES NOMINAL IN |
| General Characteristics Item Description | INTERNAL HEX .250 INCHES, EXTERNAL DIAMETER OF 0.312 ON 0.040 UNTHREADED LENGTH, DIA. OF 0.3714 +/- .0036 ON THREADED DIAMETER; 45 DEG. CHAMFER BOTH ENDS OF THREADED PORTION IN |
| Surface Treatment | PASSIVATE |
| Material | STEEL CORROSION RESISTING |
| Thread Size and Series/type Designator | 0.-24 UNF |
| 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 |
|---|---|
| B40835-1 PRIMARY | Mission Systems Orchard Park Inc (USA) |
| Reference | Meaning |
|---|---|
| B40835 | D/9 Drawing number reference only Mission Systems Orchard Park Inc |
NSN 4820-01-535-4487 is a Retainer,filter, manufactured by Mission Systems Orchard Park Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-535-4487 has 1 manufacturer part number on file: B40835-1 (Mission Systems Orchard Park Inc).
Key specifications for B40835-1: Overall Diameter: 0.371 INCHES NOMINAL IN; General Characteristics Item Description: INTERNAL HEX .250 INCHES, EXTERNAL DIAMETER OF 0.312 ON 0.040 UNTHREADED LENGTH, DIA. OF 0.3714 +/- .0036 ON THREADED DIAMETER; 45 DEG. CHAMFER BOTH ENDS OF THREADED PORTION IN; Overall Length: 0.250 INCHES NOMINAL IN; Special Features: MATERIAL: CRES TYPE 17-4PH COND A IAW AMS 5643, HEAT TREAT TO COND H900; TRACEABILITY REQUIRED BY LOT NUMBER. 5 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.