PartsTable
Technical Data Sheet
91309A558 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.750 INCHES MINIMUM IN, fastener_length: 4.000 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-299-2383, 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
91309A558
NSN: 5306-00-299-2383
FSC: 5306
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
thread_class2A A
thread_length0.750 INCHES MINIMUM IN
fastener_length4.000 INCHES NOMINAL IN
hardness_rating100.0 ROCKWELL B NOMINAL OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_between_flats0.425 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
nominal_thread_diameter0.250 INCHES IN
NSN5306-00-299-2383
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91309A558 · 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
MINIMUM TENSILE STRENGTH: 69000 POUNDS PER SQUARE INCH LBS
THREAD QUANTITY PER INCH: 20
FASTENER LENGTH: 4.000 INCHES NOMINAL IN
THREAD CLASS: 2A A
HEAD STYLE: HEXAGON
THREAD LENGTH: 0.750 INCHES MINIMUM IN
HEAD HEIGHT: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
FEATURES PROVIDED: FINISHED HEAD
TECHNICAL CHARACTERISTICS (FLIS)
MINIMUM TENSILE STRENGTH69000 POUNDS PER SQUARE INCH LBS
THREAD QUANTITY PER INCH20
FASTENER LENGTH4.000 INCHES NOMINAL IN
THREAD CLASS2A A
HEAD STYLEHEXAGON
THREAD LENGTH0.750 INCHES MINIMUM IN
HEAD HEIGHT0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
FEATURES PROVIDEDFINISHED HEAD
WIDTH BETWEEN FLATS0.425 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
102484Upgraded Successor
successor cross-reference
successor
FFB575Upgraded Successor
successor cross-reference
successor
MS35354-201Upgraded Successor
successor cross-reference
successor
102495Upgraded Successor
successor cross-reference
successor
109177Upgraded Successor
successor cross-reference
successor
131286Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91309A558?
91309A558 is a BOLT,MACHINE.
What parts can replace 91309A558?
There are 16 known substitutes for 91309A558: 102484, FFB575, MS35354-201 and 13 more. Substitute compatibility should be verified for your specific system.
Is 91309A558 still available?
91309A558 is currently cancelled.
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