The Pulley Assembly, cataloged under National Stock Number 5845-01-178-9725, is classified within Federal Supply Class 5845 (Underwater Sound Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Raytheon Company Dba Raytheon Co. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5845-01-178-9725 |
| Primary Part Number | 550014-1 |
| Item Name | Pulley Assembly |
| FSC / FSG | 5845 / 58 — Underwater Sound Equipment |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM 6061-T6,TEMPER T6 PER ASTM STD B211; FINISH: ANODIZE TYPE II,CLASS 2,BLACK PER MIL-A-8625; 1.669 IN. MIN 1.673 IN. MAX OD; 0.750 IN. LG,TOOTH DATA: PITCH 0.125; PITCH DIA 1.631; NUMBER OF GROOVES 41; TOOTH PROFILE 50 DEG; SHAFT: CRES BAR,CLASS 303,COND A,COLD FINISH PER QQ-S-764; 11700 IN. LG,0.2495 IN. MIN 0.2497 IN. MAX DIA; SHAFT IS PINNED TO PULLEY BY 2 SET SCREWS 0.062 IN. DIA,0.1120-40 UNC-2B THDS; BORE IS 0.2500 IN. MIN 0.2510 IN. MAX DIA IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5845-01-178-9725 is a Pulley Assembly, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 5845, Underwater Sound Equipment. Status: active.
NSN 5845-01-178-9725 has 3 manufacturer part numbers on file: 550014-1 (Raytheon Company), 550014-1 (Raytheon Company Dba Raytheon Co), 550014-1 (Spencer Industries Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5998-01-224-9527, 3110-01-246-8332, 5342-01-296-7764. Verify interchangeability with system specifications before substitution.
Key specifications for 550014-1: General Characteristics Item Description: ALUMINUM 6061-T6,TEMPER T6 PER ASTM STD B211; FINISH: ANODIZE TYPE II,CLASS 2,BLACK PER MIL-A-8625; 1.669 IN. MIN 1.673 IN. MAX OD; 0.750 IN. LG,TOOTH DATA: PITCH 0.125; PITCH DIA 1.631; NUMBER OF GROOVES 41; TOOTH PROFILE 50 DEG; SHAFT: CRES BAR,CLASS 303,COND A,COLD FINISH PER QQ-S-764; 11700 IN. LG,0.2495 IN. MIN 0.2497 IN. MAX DIA; SHAFT IS PINNED TO PULLEY BY 2 SET SCREWS 0.062 IN. DIA,0.1120-40 UNC-2B THDS; BORE IS 0.2500 IN. MIN 0.2510 IN. MAX DIA IN. 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.
NSN 5845-01-178-9725 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.