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PartsTable / COMPONENT / 1055F105SH1ITEM59
1055F105SH1ITEM59 ✓ 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 SETSCREW is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, point_style: CUP, thread_class: 2A A, thread_length: 0.375 INCHES MINIMUM IN, fastener_length: 0.375 INCHES NOMINAL IN, hardness_rating: 45.0 ROCKWELL C MINIMUM OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-249-0220, 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
1055F105SH1ITEM59
NSN: 5305-00-249-0220
FSC: 5305
CAGE: 99883 — SUPPLY FORWARDING ANNEX (USA)
SPECIFICATIONS
materialSTEEL OVERALL
point_styleCUP
thread_class2A A
thread_length0.375 INCHES MINIMUM IN
fastener_length0.375 INCHES NOMINAL IN
hardness_rating45.0 ROCKWELL C MINIMUM OVERALL
features_providedCASEHARDENED
width_across_flats0.188 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.375 INCHES IN
thread_quantity_per_inch16
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-00-249-0220
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1055F105SH1ITEM59 · 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: 45.0 ROCKWELL C MINIMUM OVERALL
•
WIDTH ACROSS FLATS: 0.188 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
DEPARTURE FROM CITED DESIGNATOR: AS MOD BY THD CLASS
•
THREAD LENGTH: 0.375 INCHES MINIMUM IN
•
FEATURES PROVIDED: CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
HARDNESS RATING45.0 ROCKWELL C MINIMUM OVERALL
WIDTH ACROSS FLATS0.188 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
THREAD CLASS2A A
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD DIAMETER0.375 INCHES IN
DEPARTURE FROM CITED DESIGNATORAS MOD BY THD CLASS
THREAD LENGTH0.375 INCHES MINIMUM IN
FEATURES PROVIDEDCASEHARDENED
INTERNAL DRIVE STYLEHEXAGON
NONDEFINITIVE SPEC/STD DATAG TYPE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
MILB933TYPEGInterchangeable
interchangeable cross-reference
interchangeable
29231SInterchangeable
interchangeable cross-reference
interchangeable
MS51017-22Interchangeable
interchangeable cross-reference
interchangeable
SF10411PC6Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1055F105SH1ITEM59?
1055F105SH1ITEM59 is a SETSCREW.
What parts can replace 1055F105SH1ITEM59?
There are 4 known substitutes for 1055F105SH1ITEM59: MILB933TYPEG, 29231S, MS51017-22 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1055F105SH1ITEM59?
1055F105SH1ITEM59 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-249-0220. 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