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FF-B-584 — BOLT,SQUARE NECK

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

FF-B-584: BOLT,SQUARE NECK.

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 U.S.

Government catalog 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
NIINs: 000062269, 000109115, 000119430, 000120231, 000120955, 000126198, 000126227, 000126373, 000126638, 000126652, 000270722, 000445623, 000538381, 000548004, 000548024, 000548052, 000580518, 000589259, 000678511, 000890174, 000891421, 000891422, 000891424, 000891425, 000891427, 000891531, 001080943, 001089988, 001255729, 001424956, 001450875, 001525495, 001595578, 001754966, 001775707, 001775733, 001775734, 001903277, 002074633, 002074661, 002305219, 002471005, 002488666, 002488679, 002488688, 002488691, 002488700, 002604628, 002604637, 002607507, 002607538, 002607553, 002633533, 002650761, 002650772, 002650780, 002650782, 002650842, 002658603, 002658604, 002658605, 002682439, 002682440, 002682763, 002762477, 003586518, 004041385, 004093361, 004339169, 005147530, 006387784, 007024483, 007024484, 008162441, 008511129, 008527068, 008892943, 009009653, 009115005, 009515699, 010097166, 010146803, 010236245, 010305632, 010322309, 010591086, 010895673, 010937021, 011335817, 011345738, 011377040, 011878759, 011910392, 012412645, 014664476
FSC: 5306 — Bolts
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
•
NECK LENGTH: 0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
•
FASTENER LENGTH: 3.969 INCHES MINIMUM AND 4.031 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
•
THREAD LENGTH: 0.875 INCHES MINIMUM IN
•
HARDNESS RATING: 95.0 ROCKWELL B MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM-307 GRADE A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.312 INCHES IN
TECHNICAL CHARACTERISTICS
NECK LENGTH0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
HEAD HEIGHT0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
FASTENER LENGTH3.969 INCHES MINIMUM AND 4.031 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
THREAD LENGTH0.875 INCHES MINIMUM IN
HARDNESS RATING95.0 ROCKWELL B MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-307 GRADE A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEBUTTON
THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES 1
MS35751-53Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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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 is 1 known substitute for FF-B-584: MS35751-53. Substitute compatibility should be verified for your specific system.
What is the NSN for FF-B-584?
FF-B-584 is cataloged in the U.S. Government catalog under NSN 5306-00-006-2269. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.