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Technical Data Sheet
PartsTable / COMPONENT / 2559551
2559551 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The CABLE ASSEMBLY,RADIO FREQUENCY is a the manufacturer cable assembly designed for reliable internal or external connectivity in enterprise server and storage environments. Key specifications include material: STEEL OVERALL, head_style: ROUND W/WRENCH FLATS, grip_length: 8.271 INCHES MINIMUM AND 8.291 INCHES MAXIMUM IN, head_height: 0.406 INCHES NOMINAL IN, thread_class: 3A A, grip_diameter: 0.8730 INCHES MINIMUM AND 0.8737 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 5306-00-620-3316, 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
2559551
NSN: 5306-00-620-3316
FSC: 5306
CAGE: 0EUD7 — UNITED AERONAUTICAL CORPORATION DBA UNITED AERONAUTICAL CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleROUND W/WRENCH FLATS
grip_length8.271 INCHES MINIMUM AND 8.291 INCHES MAXIMUM IN
head_height0.406 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.8730 INCHES MINIMUM AND 0.8737 INCHES MAXIMUM IN
head_diameter1.375 INCHES NOMINAL IN
thread_length0.991 INCHES MINIMUM AND 1.011 INCHES MAXIMUM IN
fastener_length9.282 INCHES NOMINAL IN
style_designatorDUAL INTERNAL ANGLE CONNECTOR
termination_typeCONNECTOR PLUG BOTH ENDS SINGLE CONDUCTOR
thread_directionRIGHT-HAND
NSN5306-00-620-3316
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2559551 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH BETWEEN FLATS: 1.125 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNF
•
GRIP DIAMETER: 0.8730 INCHES MINIMUM AND 0.8737 INCHES MAXIMUM IN
•
GRIP LENGTH: 8.271 INCHES MINIMUM AND 8.291 INCHES MAXIMUM IN
•
TEST DATA DOCUMENT: 81349-MIL-I-6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
MINIMUM TENSILE STRENGTH: 220000 POUNDS PER SQUARE INCH LBS
TYPICAL APPLICATIONS
  • Server Internal Cabling
  • Data Center Cable Infrastructure
  • SAS/SATA Drive Connectivity
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH BETWEEN FLATS1.125 INCHES NOMINAL IN
THREAD CLASS3A A
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES DESIGNATORUNF
GRIP DIAMETER0.8730 INCHES MINIMUM AND 0.8737 INCHES MAXIMUM IN
GRIP LENGTH8.271 INCHES MINIMUM AND 8.291 INCHES MAXIMUM IN
TEST DATA DOCUMENT81349-MIL-I-6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
MINIMUM TENSILE STRENGTH220000 POUNDS PER SQUARE INCH LBS
MATERIALSTEEL OVERALL
NOMINAL THREAD DIAMETER0.875 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
9914-1133Interchangeable
interchangeable cross-reference
interchangeable
255955Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2559551?
2559551 is a CABLE ASSEMBLY,RADIO FREQUENCY.
What parts can replace 2559551?
There are 2 known substitutes for 2559551: 9914-1133, 255955. Substitute compatibility should be verified for your specific system.
What is the NSN for 2559551?
2559551 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-620-3316. 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