NSN 5360-00-321-1674, 5360003211674
SPRING,HELICAL,TORSION

Federal Supply Classification: FSC 5360 - Coil, Flat, Leaf, and Wire Springs
National Item Identification Number: NIIN 003211674
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: We have 1 qualified suppliers

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DLMS^® Summary

National Stock Number 5360-00-321-1674

National Stock Number (NSN) 5360-00-321-1674, or NIIN 003211674, (spring,helical,torsion) was assigned January 1, 1963 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 one supplier. Today, one supplier is listed as an Active supplier 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 somewhat common among different platforms, belonging to 2 different weapons systems.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Sep 02, 2005, 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 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) 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 5360003211674 does not contain precious metals.

This information was last updated on Aug 01, 2025.

Technical Characteristics

MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) UNABLE TO DECODE
END STYLE: (ABQK) UNABLE TO DECODE
MATERIAL: (MATT) UNABLE TO DECODE
END ANGULAR RELATIONSHIP: (AXMH) ENDS PARALLEL ONE TO OTHER
COIL HELIX DIRECTION: (AXLH) LEFT-HAND
COIL QUANTITY: (APCN) 3-1/2
END LENGTH FROM SECOND BEND TO THIRD BEND OR END: (CXTP) 0.162 INCHES MINIMUM AND 0.194 INCHES MAXIMUM SECOND END
END LENGTH FROM SECOND BEND TO THIRD BEND OR END: (CXTP) 0.256 INCHES MINIMUM AND 0.287 INCHES MAXIMUM FIRST END
END LENGTH: (CXTH) 1.188 INCHES MINIMUM AND 1.250 INCHES MAXIMUM BOTH ENDS
END STYLE: (ABQK) OFFSET HALF LOOP, LEFT END FIRST END
END STYLE: (ABQK) SMALL OFFSET HOOK AT SIDE SECOND END
HOOK RADIUS: (AXMC) 0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM BOTH ENDS
HOOK RADIUS: (AXMC) 0.188 INCHES MINIMUM AND 0.219 INCHES MAXIMUM FIRST END
INSIDE DIAMETER: (AARX) 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) 17-7PH ARMC STEEL CORP MFR REF SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: (MATT) STEEL COMP 631 OVERALL
SPRING FREE LENGTH: (AGEK) 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM
SPRING FREE OUTSIDE DIAMETER: (AXLQ) 0.620 INCHES MINIMUM AND 0.648 INCHES MAXIMUM
STYLE DESIGNATOR: (STYL) SINGLE TORSION LEFT HAND