NSN 5845-01-178-9725, 5845011789725
PULLEY ASSEMBLY

Federal Supply Classification: FSC 5845 - Underwater Sound Equipment
National Item Identification Number: NIIN 011789725
Codification Country: United States
Item Name Code: INC 77777
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

Availability: Readily Available Qualified Suppliers: Currently qualifying suppliers

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DLMS^® Summary

National Stock Number 5845-01-178-9725

National Stock Number (NSN) 5845-01-178-9725, or NIIN 011789725, (pulley assembly) was assigned May 12, 1984 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There is only one manufacturer part number associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 suppliers. Today, 4 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers are deemed design controlled or valid supply parts.

This part number has not been procured by the US Government in over 5 years.

This NSN is somewhat common among different platforms, belonging to 3 different weapons systems.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 11, 2014, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The annual buy value of this part falls below the screening threshold of $10,000 but it has been screened for known source(s). (NOTE: This code shall not be used when screening parts entering the inventory. It shall not be assigned in preference to or supersede any other AMSC.) Valid AMCs: 1, 2, 3, 4 and 5.

This NSN is assigned to Item Name Code (INC) 77777. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 5845011789725 does not contain precious metals.

This NSN is associated to Schedule B 9014900000: parts & accessories for direction finding compasses and other navigational instruments and appliances. The Schedule B End Use is listed as marine engines, parts. NAICS classification category 334511: search, detection, navigation, guidance, aeronautical, and nautical system and instrument manufacturing.

This information was last updated on Jul 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) 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