The Plunger,bottom, cataloged under National Stock Number 4820-00-832-7783, 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 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-832-7783 |
| Primary Part Number | 8327783 |
| Item Name | Plunger,bottom |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | BRONZE CASTING,SPEC QQ-B-726,CLASS A OR B,ALTERNATE SPEC QQ-B-671,CLASS 1,OR SAE 43,68A,430A OR 430 B,3.250 IN. LG O/A,0.562 IN. STEM DIA,2.469 IN. STEM LG,1.750 IN. FLANGE DIA 0.156 IN. FLANGE THK,0.625 IN. HEAD LG,7/8-20 UNF 2A THD ON HEAD OD,0.438 IN. THD LG,1/2-20 UNF 2B THD HOLETHRU HEAD CENTER TO A DEPTH OF 0.688 IN. A |
| 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 |
|---|---|
| 8327783 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 445E17 | 5/9 Secondary reference Diamond Reo Truck Co |
| 956346 | 5/9 Secondary reference Sasco Inc Canadian Div |
| 8327783 | 3/9 Design control — primary reference Syltone Industries Llc Dba Gardner Denver Inc. Div Emco Wheaton |
| S803 | 5/9 Secondary reference Syltone Industries Llc Dba Gardner Denver Inc. Div Emco Wheaton |
| 2299777 | 5/9 Secondary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| 2299777 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
NSN 4820-00-832-7783 is a Plunger,bottom, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-832-7783 has 1 manufacturer part number on file: 8327783 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 5975-01-590-5416. Verify interchangeability with system specifications before substitution.
Key specifications for 8327783: General Characteristics Item Description: BRONZE CASTING,SPEC QQ-B-726,CLASS A OR B,ALTERNATE SPEC QQ-B-671,CLASS 1,OR SAE 43,68A,430A OR 430 B,3.250 IN. LG O/A,0.562 IN. STEM DIA,2.469 IN. STEM LG,1.750 IN. FLANGE DIA 0.156 IN. FLANGE THK,0.625 IN. HEAD LG,7/8-20 UNF 2A THD ON HEAD OD,0.438 IN. THD LG,1/2-20 UNF 2B THD HOLETHRU HEAD CENTER TO A DEPTH OF 0.688 IN. A. 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.