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PartsTable / COMPONENT / 112159001 ITEM NO56
112159001 ITEM NO56 ✓ 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 SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2A A, fastener_length: 1.250 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, nominal_thread_diameter: 0.375 INCHES IN, thread_quantity_per_inch: 16. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-450-0328, 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
112159001 ITEM NO56
NSN: 5305-01-450-0328
FSC: 5305
CAGE: 07309 — BIRD-JOHNSON PROPELLER COMPANY, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A A
fastener_length1.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.375 INCHES IN
thread_quantity_per_inch16
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationMIL-S-122G,TY1,GR5 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL G
NSN5305-01-450-0328
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 112159001 ITEM NO56 · 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
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-122G,TY1,GR5 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL G
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 16
•
MATERIAL: STEEL OVERALL
•
FASTENER LENGTH: 1.250 INCHES NOMINAL IN
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD DIAMETER0.375 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-122G,TY1,GR5 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL G
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH16
MATERIALSTEEL OVERALL
FASTENER LENGTH1.250 INCHES NOMINAL IN
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
18G52Interchangeable
interchangeable cross-reference
interchangeable
BB217RInterchangeable
interchangeable cross-reference
interchangeable
1828A1Interchangeable
interchangeable cross-reference
interchangeable
M461Interchangeable
interchangeable cross-reference
interchangeable
M-473Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 112159001 ITEM NO56?
112159001 ITEM NO56 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 112159001 ITEM NO56?
There are 5 known substitutes for 112159001 ITEM NO56: 18G52, BB217R, 1828A1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 112159001 ITEM NO56?
112159001 ITEM NO56 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-450-0328. 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