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Technical Data Sheet
PartsTable / COMPONENT / MS51957-83B
MS51957-83B ✓ 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: PAN, head_height: 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN, thread_length: 0.869 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN, fastener_length: 0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM 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 5305-01-110-1128, 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
MS51957-83B
NSN: 5305-01-110-1128
FSC: 5305
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
head_stylePAN
head_height0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN
thread_length0.869 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
fastener_length0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.250 INCHES IN
screw_surface_treatmentOXIDE
minimum_tensile_strength80000 POUNDS PER SQUARE INCH LBS
thread_quantity_per_inch20
NSN5305-01-110-1128
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51957-83B · 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 DOCUMENT AND CLASSIFICATION: MIL-C-13924 CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE
•
FASTENER LENGTH: 0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD QUANTITY PER INCH: 20
•
MINIMUM TENSILE STRENGTH: 80000 POUNDS PER SQUARE INCH LBS
•
HEAD HEIGHT: 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
TECHNICAL CHARACTERISTICS (FLIS)
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924 CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE
FASTENER LENGTH0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD QUANTITY PER INCH20
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH LBS
HEAD HEIGHT0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
NONDEFINITIVE SPEC/STD DATA3 TYPE AND 9C STYLE
SCREW SURFACE TREATMENTOXIDE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
AESF5C250A00SH8A31Interchangeable
interchangeable cross-reference
interchangeable
343-0269-000Interchangeable
interchangeable cross-reference
interchangeable
9434148Interchangeable
interchangeable cross-reference
interchangeable
FF-S-92Interchangeable
Same NIIN cross-reference
interchangeable
MS51957-83Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51957-83B?
MS51957-83B is a SCREW,MACHINE.
What parts can replace MS51957-83B?
There are 5 known substitutes for MS51957-83B: AESF5C250A00SH8A31, 343-0269-000, 9434148 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51957-83B?
MS51957-83B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-110-1128. 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