The Diaphram,air Control, cataloged under National Stock Number 2990-00-063-7770, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Bellofram Corporation. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-063-7770 |
| Primary Part Number | 3-2-87-1-69DBC |
| Item Name | Diaphram,air Control |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Bellofram Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | DISK TYPE,2.875 IN. OD;1.688 IN. H;ONE HOLE,CENTRALLY LOCATED IN BOTTOM 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 |
|---|---|
| 3-2-87-1-69DBC PRIMARY | Bellofram Corporation (USA) |
| 40855 | Jenny Products, Inc (USA) |
| Reference | Meaning |
|---|---|
| 40855 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
NSN 2990-00-063-7770 is a Diaphram,air Control, manufactured by Bellofram Corporation, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-063-7770 has 2 manufacturer part numbers on file: 3-2-87-1-69DBC (Bellofram Corporation), 40855 (Jenny Products, Inc).
4 possible matches (shared part number, not a government interchangeability claim): 6520-00-501-5285, 5995-01-068-0452, 4940-01-184-0142. Verify interchangeability with system specifications before substitution.
Key specifications for 3-2-87-1-69DBC: General Characteristics Item Description: DISK TYPE,2.875 IN. OD;1.688 IN. H;ONE HOLE,CENTRALLY LOCATED IN BOTTOM IN; End Item Identification: ROTARY COMPRESSOR DAVEY MODEL 5M250 RPV. 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.