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PartsTable / COMPONENT / A1556-1A
A1556-1A ✓ 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 BAR,BUCKING,RIVET is a the manufacturer industrial component. Key specifications include taper_length: 4.250 INCHES NOMINAL IN, overall_length: 23.250 INCHES NOMINAL IN, recess_diameter: 0.500 INCHES NOMINAL IN, tool_style_designator: BB3, nondefinitive_spec/std_data: IX TYPE AND 2 SIZE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-242-9203, 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
A1556-1A
NSN: 5120-00-242-9203
FSC: 5120
CAGE: 81336 — CHIEF OF ENGINEERS DEPT OF ARMY (USA)
SPECIFICATIONS
taper_length4.250 INCHES NOMINAL IN
overall_length23.250 INCHES NOMINAL IN
recess_diameter0.500 INCHES NOMINAL IN
tool_style_designatorBB3
nondefinitive_spec/std_dataIX TYPE AND 2 SIZE
NSN5120-00-242-9203
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BAR,BUCKING,RIVET TITLE COMPONENT PN A1556-1A MFR BAR,BUCKING,RIVET
KEY FEATURES
•
NONDEFINITIVE SPEC/STD DATA: IX TYPE AND 2 SIZE
•
TAPER LENGTH: 4.250 INCHES NOMINAL IN
•
RECESS DIAMETER: 0.500 INCHES NOMINAL IN
•
TOOL STYLE DESIGNATOR: BB3
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATAIX TYPE AND 2 SIZE
TAPER LENGTH4.250 INCHES NOMINAL IN
RECESS DIAMETER0.500 INCHES NOMINAL IN
OVERALL LENGTH23.250 INCHES NOMINAL IN
TOOL STYLE DESIGNATORBB3
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
ZT614Interchangeable
interchangeable cross-reference
interchangeable
AA52123-XInterchangeable
interchangeable cross-reference
interchangeable
A-A-52123Interchangeable
interchangeable cross-reference
interchangeable
MIL-B-920Interchangeable
interchangeable cross-reference
interchangeable
AA52123-VIIInterchangeable
interchangeable cross-reference
interchangeable
MIL-B-920 TY7SZ3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A1556-1A?
A1556-1A is a BAR,BUCKING,RIVET.
What parts can replace A1556-1A?
There are 24 known substitutes for A1556-1A: ZT614, AA52123-X, A-A-52123 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A1556-1A?
A1556-1A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-242-9203. 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