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21791-1 ✓ 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 CIRCUIT CARD ASSEMBLY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN, thread_length: 0.719 INCHES MINIMUM AND 0.750 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 5360-00-163-9038, 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
21791-1
NSN: 5360-00-163-9038
FSC: 5360
CAGE: 72914 — GRIMES AEROSPACE COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
thread_length0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
fastener_length0.844 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.312 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
internal_drive_styleHEXAGON
NSN5360-00-163-9038
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CIRCUIT CARD ASSEMBLY TITLE COMPONENT PN 21791-1 MFR CIRCUIT CARD ASSEMBLY
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: ANNEALED SPRING STEEL AISI 1095,2.046 IN. LG,1.968 IN. W,0.025 IN. THK,TWO 0.144 IN. DIA HOLES IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONANNEALED SPRING STEEL AISI 1095,2.046 IN. LG,1.968 IN. W,0.025 IN. THK,TWO 0.144 IN. DIA HOLES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
A10853Interchangeable
interchangeable cross-reference
interchangeable
217911Interchangeable
interchangeable cross-reference
interchangeable
MS16997-98Interchangeable
interchangeable cross-reference
interchangeable
21791Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21791-1?
21791-1 is a CIRCUIT CARD ASSEMBLY.
What parts can replace 21791-1?
There are 4 known substitutes for 21791-1: A10853, 217911, MS16997-98 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21791-1?
21791-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-163-9038. 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