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LS 3991 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

STRUCTURAL SECTION,SPECIAL SHAPE. Key specifications include length: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT, material: ALUMINUM ALLOY 6061, heat_treatment: T-6 SOLUTION HEAT TREATED, fabrication_method: EXTRUDED, nondefinitive_spec/std_data: 6061 ALLOY AND T6 TEMPER, material_document_and_classification: AMS-QQ-A-200/8 FED SPEC SINGLE MATERIAL RESPONSE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 9540-01-372-1115, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
LS 3991
NSN: 9540-01-372-1115
FSC: 9540
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
length10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
materialALUMINUM ALLOY 6061
heat_treatmentT-6 SOLUTION HEAT TREATED
fabrication_methodEXTRUDED
nondefinitive_spec/std_data6061 ALLOY AND T6 TEMPER
material_document_and_classificationAMS-QQ-A-200/8 FED SPEC SINGLE MATERIAL RESPONSE
NSN9540-01-372-1115
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available STRUCTURAL SECTION,SPECIAL SHAPE TITLE COMPONENT PN LS 3991 MFR STRUCTURAL SECTION,SPE
KEY FEATURES
•
MATERIAL: ALUMINUM ALLOY 6061
•
HEAT TREATMENT: T-6 SOLUTION HEAT TREATED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS-QQ-A-200/8 FED SPEC SINGLE MATERIAL RESPONSE
•
NONDEFINITIVE SPEC/STD DATA: 6061 ALLOY AND T6 TEMPER
•
FABRICATION METHOD: EXTRUDED
•
LENGTH: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALALUMINUM ALLOY 6061
HEAT TREATMENTT-6 SOLUTION HEAT TREATED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS-QQ-A-200/8 FED SPEC SINGLE MATERIAL RESPONSE
NONDEFINITIVE SPEC/STD DATA6061 ALLOY AND T6 TEMPER
FABRICATION METHODEXTRUDED
LENGTH10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
50SSInterchangeable
interchangeable cross-reference
interchangeable
50SS1CLInterchangeable
interchangeable cross-reference
interchangeable
A440179 FIND 36Interchangeable
interchangeable cross-reference
interchangeable
712-002369Interchangeable
interchangeable cross-reference
interchangeable
283-429AInterchangeable
interchangeable cross-reference
interchangeable
50-10725 4533-1.0Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is LS 3991?
LS 3991 is a STRUCTURAL SECTION,SPECIAL SHAPE.
What parts can replace LS 3991?
There are 22 known substitutes for LS 3991: 50SS, 50SS1CL, A440179 FIND 36 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for LS 3991?
LS 3991 is cataloged in the Federal Logistics Information System (FLIS) under NSN 9540-01-372-1115. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026