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Technical Data Sheet
PartsTable / COMPONENT / 9177374
9177374 ✓ 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 THUMBSCREW is a the manufacturer industrial component. Key specifications include thread_class: 2A A, nominal_thread_diameter: 0.250 INCHES IN, thread_quantity_per_inch: 20, thread_series_designator: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-779-5134, 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
9177374
NSN: 5305-00-779-5134
FSC: 5305
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
thread_class2A A
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN5305-00-779-5134
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 9177374 · 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 QUANTITY PER INCH: 20
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
A28-239Interchangeable
interchangeable cross-reference
interchangeable
C36838Interchangeable
interchangeable cross-reference
interchangeable
AM1Interchangeable
interchangeable cross-reference
interchangeable
ABKB BLANKSInterchangeable
interchangeable cross-reference
interchangeable
1041CInterchangeable
interchangeable cross-reference
interchangeable
41CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9177374?
9177374 is a THUMBSCREW.
What parts can replace 9177374?
There are 15 known substitutes for 9177374: A28-239, C36838, AM1 and 12 more. Substitute compatibility should be verified for your specific system.
Is 9177374 still available?
9177374 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026