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Technical Data Sheet
PartsTable / COMPONENT / FF-B-584
FF-B-584 ✓ 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 BOLT,SQUARE NECK is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 651 OVERALL, head_style: BUTTON, neck_width: 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, head_height: 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN, head_length: 0.975 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN, neck_length: 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-006-2269, 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
FF-B-584
NSN: 5306-00-006-2269
FSC: 5306
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialCOPPER ALLOY 651 OVERALL
head_styleBUTTON
neck_width0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
head_height0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
head_length0.975 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
neck_length0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.563 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
thread_length0.750 INCHES NOMINAL IN
fastener_length2.219 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN
hardness_rating95.0 ROCKWELL B MAXIMUM OVERALL
special_featuresFURNISHED WITH ONE SQUARE NUT IN ACCORDANCE WITH FEDERAL SPECIFICATION FF-N-836 TYPE1 STYLE1
NSN5306-00-006-2269
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FF-B-584 · 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
•
HARDNESS RATING: 95.0 ROCKWELL B MAXIMUM OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
NECK WIDTH: 0.307 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
MINIMUM TENSILE STRENGTH: 55000 POUNDS PER SQUARE INCH LBS
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM-307 GRADE A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
HEAD HEIGHT: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HARDNESS RATING95.0 ROCKWELL B MAXIMUM OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NECK WIDTH0.307 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
MINIMUM TENSILE STRENGTH55000 POUNDS PER SQUARE INCH LBS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-307 GRADE A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HEAD HEIGHT0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
HEAD DIAMETER0.688 INCHES MINIMUM AND 0.719 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
109115Upgraded Successor
successor cross-reference
successor
120955Upgraded Successor
successor cross-reference
successor
FFB584Upgraded Successor
successor cross-reference
successor
MT58Upgraded Successor
successor cross-reference
successor
MS35751-19Upgraded Successor
successor cross-reference
successor
MS35752&11Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF-B-584?
FF-B-584 is a BOLT,SQUARE NECK.
What parts can replace FF-B-584?
There are 15 known substitutes for FF-B-584: 109115, 120955, FFB584 and 12 more. Substitute compatibility should be verified for your specific system.
Is FF-B-584 still available?
FF-B-584 is currently cancelled.
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Last verified: July 2026