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A5991 ✓ 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

The CASTING,FORK,PISTON is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, corner_shape: SQUARE ALL CORNERS, overall_length: 0.1200 INCHES MINIMUM AND 0.1300 INCHES MAXIMUM IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 0.1200 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN, body_outside_diameter: 0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5365-00-043-0248, 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
A5991
NSN: 5365-00-043-0248
FSC: 5365
CAGE: 72914 — GRIMES AEROSPACE COMPANY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
corner_shapeSQUARE ALL CORNERS
overall_length0.1200 INCHES MINIMUM AND 0.1300 INCHES MAXIMUM IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter0.1200 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
body_outside_diameter0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN
NSN5365-00-043-0248
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CASTING,FORK,PISTON TITLE COMPONENT PN A5991 MFR CASTING,FORK,PISTON
KEY FEATURES
•
BODY OUTSIDE DIAMETER: 0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN
•
CORNER SHAPE: SQUARE ALL CORNERS
•
MATERIAL: ALUMINUM ALLOY OVERALL
•
BODY INSIDE DIAMETER: 0.1200 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
TECHNICAL CHARACTERISTICS (FLIS)
BODY OUTSIDE DIAMETER0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN
CORNER SHAPESQUARE ALL CORNERS
MATERIALALUMINUM ALLOY OVERALL
OVERALL LENGTH0.1200 INCHES MINIMUM AND 0.1300 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.1200 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
A-599Interchangeable
interchangeable cross-reference
interchangeable
A-599-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A5991?
A5991 is a CASTING,FORK,PISTON.
What parts can replace A5991?
There are 2 known substitutes for A5991: A-599, A-599-1. Substitute compatibility should be verified for your specific system.
What is the NSN for A5991?
A5991 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5365-00-043-0248. 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