NSN 9540-00-250-3604, 9540002503604
BEAM,STRUCTURAL

Federal Supply Classification: FSC 9540 - Structural Shapes, Nonferrous Base Metal
National Item Identification Number: NIIN 002503604
Codification Country: United States
Item Name Code: INC 37018
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.

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DLMS^® Summary

National Stock Number 9540-00-250-3604

National Stock Number (NSN) 9540-00-250-3604, or NIIN 002503604, (beam,structural) 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 are 4 manufacturer part numbers associated with this NSN. 2 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, there are no suppliers that 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.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Mar 02, 2006, 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) 37018. [A STRUCTURAL SHAPE FABRICATED FROM A FERROUS OR NONFERROUS MATERIAL AND RESEMBLES THE FOLLOWING CROSS-SECTIONAL FORMS: FOR THE LETTER H, BOTH FLANGES OF THE H SECTION ARE EQUAL OR LONGER THAN THE WIDTH MEASURED ALONG THE AXIS OF THE WEB; FOR THE LETTER I, A 16 2/3 PERCENT SLOPE ON THE INSIDE FACE OF THE FERROUS TYPE FLANGE, EITHER ONE OR BOTH OF THE NONFERROUS TYPE FLANGES ARE SHORTER THAN THE LENGTH MEASURED ALONG THE AXIS OF THE WEB; FOR THE LETTERS T AND Z, ON NONFERROUS TYPE, THE WEB IS USUALLY AT RIGHT ANGLES TO THE FLANGES. LETTER H SECTION MAY HAVE A MAXIMUM OF 5 PERCENT SLOPE ON THE INSIDE FACE OF THE FLANGES.]. 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 9540002503604 does not contain precious metals.

This information was last updated on Aug 01, 2025.

Technical Characteristics

MATERIAL: (MATL) ALUMINUM ALLOY AMS-QQ-A-200/8, ALLOY 6061
UNABLE TO DECODE: (MATL) UNABLE TO DECODE
MATERIAL: (MATT) ALUMINUM ALLOY AMS-QQ-A-200/8, ALLOY 6061
BASIC SHAPE STYLE: (AGTA) I SHAPE
BOTTOM FLANGE WIDTH: (BQJH) 2.660 INCHES NOMINAL
FABRICATION METHOD: (AARN) EXTRUDED
FILLET RADIUS WHERE BOTTOM LEFT FLANGE JOINS WEB FLANGE/LEG: (BPXK) 0.290 INCHES NOMINAL
FILLET RADIUS WHERE BOTTOM RIGHT FLANGE JOINS WEB FLANGE/LEG: (BPXM) 0.290 INCHES NOMINAL
FILLET RADIUS WHERE TOP LEFT FLANGE JOINS WEB FLANGE/LEG: (BPXJ) 0.290 INCHES NOMINAL
FILLET RADIUS WHERE TOP RIGHT FLANGE JOINS WEB FLANGE/LEG: (BPXL) 0.290 INCHES NOMINAL
FIRST TIP RADIUS: (AJJB) 0.110 INCHES NOMINAL
FIRST TIP STYLE: (CMZY) LOWER RADIUS
FOURTH TIP RELATIONSHIP TO PRECEDING TIPS: (CNQN) IDENTICAL W/THIRD TIP
HEAT TREATMENT: (HEAT) T-6 SOLUTION HEAT TREATED
LEFT SIDE BOTTOM FLANGE DISTANCE TO CENTER OF BOTH FLANGES: (BPXF) 1.330 INCHES NOMINAL
LEFT SIDE BOTTOM FLANGE TIP THICKNESS: (BQJL) 0.190 INCHES NOMINAL
LEFT SIDE BOTTOM FLANGE THICKNESS: (BMPR) 0.394 INCHES NOMINAL
LEFT SIDE TOP FLANGE DISTANCE TO CENTER OF BOTH FLANGES: (BPXD) 1.330 INCHES NOMINAL
LEFT SIDE TOP FLANGE THICKNESS: (ADXR) 0.394 INCHES NOMINAL
LEFT SIDE TOP FLANGE TIP THICKNESS: (BQJK) 0.190 INCHES NOMINAL
LEFT TOP INNER FACE TO OUTER FACE ANGLE: (CRYX) 90.0 DEGREES NOMINAL
LEFT BOTTOM INNER FACE TO OUTER FACE ANGLE: (CWAT) 90.0 DEGREES NOMINAL
LENGTH: (ABRY) 20.000 FEET MINIMUM AND 30.000 FEET MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION: (MDCL) AMS-QQ-A-200/8 FED SPEC SINGLE MATERIAL RESPONSE
MATERIAL: (MATT) ALUMINUM ALLOY 6061
NONDEFINITIVE SPEC/STD DATA: (ZZZT) T6 TEMPER
OVERALL HEIGHT: (ABKW) 4.000 INCHES NOMINAL
RIGHT BOTTOM INNER FACE TO OUTER FACE ANGLE: (CTNN) 9.0 DEGREES NOMINAL
RIGHT SIDE TOP FLANGE THICKNESS: (ADXS) 0.394 INCHES NOMINAL
RIGHT SIDE TOP FLANGE TIP THICKNESS: (BQJM) 0.190 INCHES NOMINAL
RIGHT TOP INNER FACE TO OUTER FACE ANGLE: (CSTQ) 90.0 DEGREES NOMINAL
RIGHT SIDE BOTTOM FLANGE DISTANCE TO CENTER OF BOTH FLANGES: (BPXH) 1.330 INCHES NOMINAL
RIGHT SIDE BOTTOM FLANGE TIP THICKNESS: (BQJN) 0.190 INCHES NOMINAL
RIGHT SIDE BOTTOM FLANGE THICKNESS: (BMPQ) 0.394 INCHES NOMINAL
RIGHT SIDE TOP FLANGE DISTANCE TO CENTER OF BOTH FLANGES: (BPXG) 1.330 INCHES NOMINAL
SECOND TIP RELATIONSHIP TO FIRST TIP: (CNQJ) IDENTICAL
THIRD TIP RADIUS: (CNBB) 0.110 INCHES NOMINAL
THIRD TIP STYLE: (CNQM) UPPER RADIUS
THIRD TIP RELATIONSHIP TO PRECEDING TIPS: (CNQL) NOT IDENTICAL
TOP FLANGE WIDTH: (BQJG) 2.660 INCHES NOMINAL
WEB FLANGE THICKNESS: (BPXN) 0.190 INCHES NOMINAL
WEIGHT PER UNIT MEASURE: (BRFD) 2.640 POUNDS PER LINEAR FOOT