NSN 2920-00-040-0498, 2920000400498
UNIT,IGNITION ADVANCE

Federal Supply Classification: FSC 2920 - Engine Electrical System Components, Nonaircraft
National Item Identification Number: NIIN 000400498
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: We have 1 qualified suppliers

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DLMS^® Summary

National Stock Number 2920-00-040-0498

National Stock Number (NSN) 2920-00-040-0498, or NIIN 000400498, (unit,ignition advance) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There are 3 manufacturer part numbers associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is 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 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 2920000400498 contains an unknown precious metal.

This information was last updated on May 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) INTERNAL INVOLUTE SPLINE DATA'NUMBER OF TEETH 20,DIAMETRAL PITCH 16/20,PRESSURE ANGLE/AT GIVEN PITCH DIAMETER/20 DEGREES,CIRCULAR PITCH 0.1963 IN.,BASE CIRCLE DIAMETER 1.1746 IN.,CHORDAL SPACE WIDTH 0.0981 IN./MACHINE TO 0.981-0.1002/PERMISSABLE BACKLASH 0.002 TO 0.006 IN. WHEN MESHING WITH MATING SPLINE,MAXIMUM TOOTH SPACING ERROR REFERENCED TO PITCH LINE 0.003 IN. BETWEEN ADJACENT TEETH,0.0007 IN. CUMULATIVE INDEX,TEETH TO BE PARALLEL WITH AXIS WITHIN 0.0002 IN. PER IN. OF LENGTH,MAXIMUM DIM CIR SPACE WIDTH 0.1003 IN.,MIN DIM CIR SPACE WIDTH 0.0982 IN.,MIN EFF CIR SPACE WIDTH/WITH GAGE/0.0975 IN.,1.1094-1.1012 IN. BETWEEN 0.10497 IN. DIA PINS,AMERICAN BOSCH PART NUMBER GR-5221-A FSCM 01843