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Technical Data Sheet
PartsTable / COMPONENT / SMB157319
SMB157319 ✓ 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,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_style: FLAT CHAMFER, head_height: 0.109 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.438 INCHES NOMINAL IN, thread_length: 0.266 INCHES MINIMUM 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 5305-00-594-1028, 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
SMB157319
NSN: 5305-00-594-1028
FSC: 5305
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleFLAT CHAMFER
head_height0.109 INCHES NOMINAL IN
thread_class2A A
head_diameter0.438 INCHES NOMINAL IN
thread_length0.266 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.625 INCHES NOMINAL IN
shoulder_length0.312 INCHES NOMINAL FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.313 INCHES NOMINAL FIRST SHOULDER IN
surface_treatmentPASSIVATE OVERALL
NSN5305-00-594-1028
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SMB157319 · 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 COMP 303 OVERALL
•
INTERNAL DRIVE STYLE: SLOT
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
THREAD SERIES DESIGNATOR: UNF
•
SHOULDER DIAMETER: 0.313 INCHES NOMINAL FIRST SHOULDER IN
•
THREAD LENGTH: 0.266 INCHES MINIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 303 OVERALL
INTERNAL DRIVE STYLESLOT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.190 INCHES IN
THREAD SERIES DESIGNATORUNF
SHOULDER DIAMETER0.313 INCHES NOMINAL FIRST SHOULDER IN
THREAD LENGTH0.266 INCHES MINIMUM IN
SHOULDER LENGTH0.312 INCHES NOMINAL FIRST SHOULDER IN
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
MILF5504Interchangeable
interchangeable cross-reference
interchangeable
10-1970-1Interchangeable
interchangeable cross-reference
interchangeable
52701Interchangeable
interchangeable cross-reference
interchangeable
900085Interchangeable
interchangeable cross-reference
interchangeable
54470 PN/52701Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB157319?
SMB157319 is a SCREW,SHOULDER.
What parts can replace SMB157319?
There are 5 known substitutes for SMB157319: MILF5504, 10-1970-1, 52701 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SMB157319?
SMB157319 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-594-1028. 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