NSN 5307-00-739-6645, 5307007396645
STUD,CYLINDER HEAD,SPECIAL

Federal Supply Classification: FSC 5307 - Studs
National Item Identification Number: NIIN 007396645
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 5307-00-739-6645

National Stock Number (NSN) 5307-00-739-6645, or NIIN 007396645, (stud,cylinder head,special) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There are 2 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 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 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 5307007396645 contains an unknown precious metal.

This information was last updated on Aug 01, 2025.

Technical Characteristics

GENERAL CHARACTERISTICS ITEM DESCRIPTION: (TEXT) STEEL SAE 4140,RC26 MIN,RC 32 MAX ROCKWELL HARDNESS,TENSILE STRENGTH 150000 PSI MIN,7.000 IN. LG O/A,NUT END 0.750 IN. LG,THREAD SIZE 3/8-24,STUD END 0.750 IN. LG,THREAD SIZE 5/8-11,OTHER THREAD 1.625 FROM NUT END,1.000 IN. LG,THREAD SIZE 5/8-18,SHOULDER 5.375 IN. LG,0.625 IN. DIA,STEPPED TO 0.375 IN. DIA,1.625 IN. LG