NSN 5360-01-128-5640, 5360011285640
SPRING,HELICAL,TORSION

Federal Supply Classification: FSC 5360 - Coil, Flat, Leaf, and Wire Springs
National Item Identification Number: NIIN 011285640
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 4 qualified suppliers

Manufacture or supply this part?
Join our growing community of certified suppliers.

Let Us Know

CALL ABOUT NSN 5360-01-128-5640

Our client representatives are standing by to help fulfill your request.

+1-321-773-5710

REQUEST QUOTE for 5360-01-128-5640

Have a list that needs to be quoted? Upload it here.

Upload a List

DLMS^® Summary

National Stock Number 5360-01-128-5640

National Stock Number (NSN) 5360-01-128-5640, or NIIN 011285640, (spring,helical,torsion) was assigned March 25, 1982 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 7 manufacturer part numbers associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 6 suppliers. Today, 6 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers are deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.

This part number has not been procured by the US Government in over 5 years, with the most recent procurement date of May 08, 2013. There has been one contract issued for this part number, with one award given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPM5E213M3523. The total value of the awarded contracts has been US$ 3,537.80.

This NSN is somewhat common among different platforms, belonging to 10 different weapons systems.

There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Apr 11, 2013, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The Government has unlimited rights to the technical data, and the data package is complete. Valid AMCs: 1 and 2.

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 5360011285640 does not contain precious metals.

This NSN is associated to Schedule B 7320205000: helical springs not suitable for motor-vehicle suspension, of iron or steel. The Schedule B End Use is listed as finished metal shapes.

This information was last updated on Jul 01, 2025.

Technical Characteristics

END ANGULAR RELATIONSHIP: (AXMH) ENDS ANGLED ONE TO OTHER
END ITEM IDENTIFICATION: (AGAV) MACHINE GUN,5.56-MM,M249
COIL HELIX DIRECTION: (AXLH) LEFT-HAND
COIL QUANTITY: (APCN) 4
END LENGTH: (CXTH) 10.0 MILLIMETERS NOMINAL FIRST END
END LENGTH: (CXTH) 14.5 MILLIMETERS NOMINAL SECOND END
END LENGTH FROM COIL AXIS TO FIRST BEND: (CXTM) 6.0 MILLIMETERS NOMINAL SECOND END
END LENGTH FROM FIRST BEND TO SECOND BEND OR END: (CXTN) 4.24 MILLIMETERS NOMINAL SECOND END
END LENGTH FROM SECOND BEND TO THIRD BEND OR END: (CXTP) 5.0 MILLIMETERS NOMINAL SECOND END
END STYLE: (ABQK) ONE HOOK END FIRST END
END STYLE: (ABQK) PARALLEL END SECOND END
INSIDE DIAMETER: (AARX) 5.1 MILLIMETERS NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: (MATT) STEEL UNS K08500 OVERALL
SPRING FREE LENGTH: (AGEK) 6.5 MILLIMETERS NOMINAL
SPRING FREE OUTSIDE DIAMETER: (AXLQ) 7.7 MILLIMETERS NOMINAL
STOCK DIAMETER: (ACVU) 1.3 MILLIMETERS NOMINAL
STYLE DESIGNATOR: (STYL) SINGLE TORSION LEFT HAND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: (STDC) MIL-STD-171 MIL STD ALL TREATMENT RESPONSES OVERALL
SURFACE TREATMENT: (SFTT) PHOSPHATE MANGANESE AND PHOSPHATE ZINC OVERALL