NSN 5360-01-123-8311, 5360011238311
SPRING,HELICAL,TORSION

Federal Supply Classification: FSC 5360 - Coil, Flat, Leaf, and Wire Springs
National Item Identification Number: NIIN 011238311
Codification Country: United States
Item Name Code: INC 04228
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 5360-01-123-8311

National Stock Number (NSN) 5360-01-123-8311, or NIIN 011238311, (spring,helical,torsion) was assigned December 18, 1981 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There is only one manufacturer part number associated with this NSN. None of the associated 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, there are no suppliers that 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 unique to one weapons system.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Apr 12, 2013, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The data or the rights to use the data needed to purchase this part from additional sources are not owned by the Government and it has been determined that it is uneconomical to purchase them. Valid AMCs: 1, 2, 3, 4 and 5.

This NSN is assigned to Item Name Code (INC) 04228. [AN OPEN- OR CLOSE-WOUND COIL SPRING, CONSISTING OF ONE OR MORE HELICAL COILS WOUND FROM DIFFERENT SHAPES AND TYPES OF MATERIAL AND FINISHED AT THE ENDS, DESIGNED TO EXERT PRESSURE IN A ROTATING DIRECTION AROUND THE COIL AXIS. EXCLUDES:SPRINGS DESIGNED FOR THERMAL ACTUATION (SPRINGS IN WHICH THE TORSION FORCES ARE COUNTERACTED BY CHANGES IN TEMPERATURE) AND SPRING,REINFORCING,HOSE.]. 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 5360011238311 does not contain precious metals.

This information was last updated on Aug 01, 2025.

Technical Characteristics

MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) ASTM A229 ASSN STD ALL MATERIAL RESPONSES OVERALL
END LENGTH: (CXTH) 1.032 INCHES NOMINAL BOTH ENDS
MATERIAL: (MATT) STEEL COMP 1065 OVERALL OR STEEL UNS K07001 OVERALL
MATERIAL: (MATT) STEEL COMP 1065 OR STEEL UNS K07001 OVERALL
END ANGULAR RELATIONSHIP: (AXMH) END W/LH HELIX OF COIL ANGLED TO CENTER SECTION
COIL QUANTITY: (APCN) 4
END LENGTH FROM FIRST BEND TO SECOND BEND OR END: (CXTN) UNABLE TO DECODE
END LENGTH FROM SECOND BEND TO THIRD BEND OR END: (CXTP) UNABLE TO DECODE
END LENGTH: (CXTH) UNABLE TO DECODE
END STYLE: (ABQK) UNABLE TO DECODE
INSIDE DIAMETER: (AARX) 1.649 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) UNABLE TO DECODE
SPRING FREE LENGTH: (AGEK) 2.509 INCHES NOMINAL
SPRING FREE OUTSIDE DIAMETER: (AXLQ) 2.063 INCHES NOMINAL
STYLE DESIGNATOR: (STYL) SINGLE TORSION RIGHT HAND
END LENGTH FROM SECOND BEND TO THIRD BEND OR END: (CXTP) 1.125 INCHES NOMINAL OVERALL
END STYLE: (ABQK) PARALLEL, RIGHT END OVERALL
END LENGTH FROM FIRST BEND TO SECOND BEND OR END: (CXTN) 0.902 INCHES NOMINAL OVERALL