The Pulley Assembly, cataloged under National Stock Number 5845-01-178-9724, is classified within Federal Supply Class 5845 (Underwater Sound Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5845-01-178-9724 |
| Item Name | Pulley Assembly |
| FSC / FSG | 5845 / 58 — Underwater Sound Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM PULLEY 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; 2.180 IN. LG; 0.2495 IN. MIN 0.2497 IN. MAX DIA; SHAFT IS PINNED TO PULLEY ON HUB BY 2 SET SCREWS 0.062 IN. DIA,0.1120-40 UNC THDS; BORE IS 0.2500 IN. MIN 0.2510 IN. MAX DIA IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 550012-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5845-01-178-9724 is a Pulley Assembly, classified under FSC 5845, Underwater Sound Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3110-01-244-4983. Verify interchangeability with system specifications before substitution.
Key specifications for 5845-01-178-9724: General Characteristics Item Description: ALUMINUM PULLEY 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; 2.180 IN. LG; 0.2495 IN. MIN 0.2497 IN. MAX DIA; SHAFT IS PINNED TO PULLEY ON HUB BY 2 SET SCREWS 0.062 IN. DIA,0.1120-40 UNC 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.
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.