The Block,adjusting Screw, cataloged under National Stock Number 2990-00-536-2962, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is L & L Boiler Maintenance Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2990-00-536-2962 |
| Primary Part Number | 4318 |
| Item Name | Block,adjusting Screw |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | L & L Boiler Maintenance Inc |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL STEEL;0.844 IN.H;0.688 IN.HOLE DIA;0.312 IN.SQUARE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 2990-00-536-2962 is a Block,adjusting Screw, manufactured by L & L Boiler Maintenance Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-536-2962 has 2 manufacturer part numbers on file: 4318 (L & L Boiler Maintenance Inc), TC301-3 (Wisconsin Motors, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5950-01-104-1505. Verify interchangeability with system specifications before substitution.
Key specifications for 4318: General Characteristics Item Description: MATERIAL STEEL;0.844 IN.H;0.688 IN.HOLE DIA;0.312 IN.SQUARE IN; End Item Identification: TELEDYNE INC,ENGINE MODEL BKN. 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.