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PartsTable / COMPONENT / E-172-050-590 B0LT
E-172-050-590 B0LT ✓ 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: 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.750 INCHES MINIMUM IN, fastener_length: 2.750 INCHES NOMINAL 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 5306-00-174-9530, 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
E-172-050-590 B0LT
NSN: 5306-00-174-9530
FSC: 5306
CAGE: 11440 — GE STEAM POWER INC DBA GE STEAM POWER, INC DIV GENERAL ELECTRIC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
thread_class2A A
thread_length1.750 INCHES MINIMUM IN
fastener_length2.750 INCHES NOMINAL IN
hardness_rating100.0 ROCKWELL B MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentZINC OVERALL
width_between_flats1.088 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
nominal_thread_diameter0.750 INCHES IN
NSN5306-00-174-9530
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: E-172-050-590 B0LT · 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
•
MATERIAL: STEEL OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 2,GR 2 TYPE
•
HARDNESS RATING: 100.0 ROCKWELL B MAXIMUM OVERALL
•
FASTENER LENGTH: 2.750 INCHES NOMINAL IN
•
HEAD STYLE: HEXAGON
•
MINIMUM TENSILE STRENGTH: 64000 POUNDS PER SQUARE INCH LBS
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD DIAMETER: 0.750 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATA2,GR 2 TYPE
HARDNESS RATING100.0 ROCKWELL B MAXIMUM OVERALL
FASTENER LENGTH2.750 INCHES NOMINAL IN
HEAD STYLEHEXAGON
MINIMUM TENSILE STRENGTH64000 POUNDS PER SQUARE INCH LBS
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD DIAMETER0.750 INCHES IN
WIDTH BETWEEN FLATS1.088 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
HEAD HEIGHT0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
AN10H20AUpgraded Successor
successor cross-reference
successor
MIL-DTL-1222JUpgraded Successor
successor cross-reference
successor
T857Upgraded Successor
successor cross-reference
successor
MILS1222Upgraded Successor
successor cross-reference
successor
2A-4639Upgraded Successor
successor cross-reference
successor
MILB857Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is E-172-050-590 B0LT?
E-172-050-590 B0LT is a BOLT,MACHINE.
What parts can replace E-172-050-590 B0LT?
There are 12 known substitutes for E-172-050-590 B0LT: AN10H20A, MIL-DTL-1222J, T857 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for E-172-050-590 B0LT?
E-172-050-590 B0LT is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-174-9530. 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