The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-00-974-9259, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-974-9259 |
| Primary Part Number | 10916086 |
| Item Name | Valve,bleeder,hydraulic System |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Material Document and Classification | 66B FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | ZINC |
| Material | STEEL COMP 1015 OR STEEL COMP 1212 OVERALL |
| 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 |
|---|---|
| 10916086 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2530009749259 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 4820-00-974-9259 is a Valve,bleeder,hydraulic System, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-974-9259 has 1 manufacturer part number on file: 10916086 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 4820-00-976-9323. Verify interchangeability with system specifications before substitution.
Key specifications for 10916086: Material Document and Classification: 66B FED STD SINGLE MATERIAL RESPONSE OVERALL; Special Features: 1.170 IN. O/A LG; 0.375 IN. ACROSS HEX FLATS; 0.100 IN. LG HEX; 0.78125 IN. VALVE END TO NEAREST HEX SHOULDER; BARBED TY HOSE CONN,0.171875 IN. FROM HEX SHOULDER TO NEAREST EDGEOF BARBED HOSE CONN; 0.1875 IN. SMALLEST DIA,0.3125 IN. LARGEST DIA,HOSE CONN; 0.296875 IN. LG HOSE CONN; VALVE SEAT,0.277 IN. LARGEST OD OF TAPER,0.090 IN. LG TAPER,0.280 IN. LG EXCLUDING THD PORTION,0.220 IN. C OF INLET HOLE TO VALVE END; 0.094 IN. DIA INLET HOLE; EXT THD,3/8-24,UNF,RH,CL 3A,0.410 IN. LG; 0.125 IN. DIA DRAIN HOLE,1.000 IN. LG1.170 IN. O/A LG; 0.375 IN. ACROSS HEX FLATS; 0.100 IN. LG HEX; 0.78125 IN. VALVE END TO NEAREST HEX SHOULDER; BARBED TY HOSE CONN,0.171875 IN. FROM HEX SHOULDER TO NEAREST EDGEOF BARBED HOSE CONN; 0.1875 IN. SMALLEST DIA,0.3125 IN. LARGEST DIA,HOSE CONN; 0.296875 IN. LG HOSE CONN; VALVE SEAT,0.277 IN. LARGEST OD OF TAPER,0.090 IN. LG TAPER,0.280 IN. LG EXCLUDING THD PORTION,0.220 IN. C OF INLET HOLE TO VALVE END; 0.094 IN. DIA INLET HOLE; EXT THD,3/8-24,UNF,RH,CL 3A,0.410 IN. LG; 0.125 IN. DIA DRAIN HOLE,1.000 IN. LG A; Surface Treatment: ZINC; End Item Identification: 5420-00-889-20205420-00-889-2020. 3 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.