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Technical Data Sheet
PartsTable / COMPONENT / SMB187091
SMB187091 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FILLISTER, head_height: 0.111 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.208 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN, thread_length: 0.375 INCHES MINIMUM IN, screw_material: STEEL COMP 4037. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-543-5785, 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
SMB187091
NSN: 5305-00-543-5785
FSC: 5305
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
head_styleFILLISTER
head_height0.111 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.208 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
thread_length0.375 INCHES MINIMUM IN
screw_materialSTEEL COMP 4037
fastener_length0.500 INCHES NOMINAL IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.138 INCHES IN
screw_surface_treatmentPHOSPHATE
NSN5305-00-543-5785
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SMB187091 · 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
•
SCREW SURFACE TREATMENT: PHOSPHATE
•
THREAD CLASS: 2A A
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
HEAD STYLE: FILLISTER
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 40
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE
•
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
SCREW SURFACE TREATMENTPHOSPHATE
THREAD CLASS2A A
NOMINAL THREAD DIAMETER0.138 INCHES IN
HEAD STYLEFILLISTER
FASTENER LENGTH0.500 INCHES NOMINAL IN
THREAD QUANTITY PER INCH40
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
THREAD LENGTH0.375 INCHES MINIMUM IN
HEAD HEIGHT0.111 INCHES MINIMUM AND 0.132 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
44-502-1Interchangeable
interchangeable cross-reference
interchangeable
24JS118-1Interchangeable
interchangeable cross-reference
interchangeable
8050-1Interchangeable
interchangeable cross-reference
interchangeable
55511Interchangeable
interchangeable cross-reference
interchangeable
FFB171/32J11C2BInterchangeable
interchangeable cross-reference
interchangeable
FF-B-171Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB187091?
SMB187091 is a SCREW,MACHINE.
What parts can replace SMB187091?
There are 7 known substitutes for SMB187091: 44-502-1, 24JS118-1, 8050-1 and 4 more. Substitute compatibility should be verified for your specific system.
Is SMB187091 still available?
SMB187091 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