PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MS51955-8
MS51955-8 ✓ 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 SETSCREW is a the manufacturer industrial component. Key specifications include head_style: SQUARE, head_height: 0.178 INCHES MINIMUM AND 0.196 INCHES MAXIMUM IN, point_style: CUP, thread_class: 2A A, thread_length: 1.500 INCHES MAXIMUM IN, fastener_length: 1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-054-9263, 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
MS51955-8
NSN: 5305-00-054-9263
FSC: 5305
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
head_styleSQUARE
head_height0.178 INCHES MINIMUM AND 0.196 INCHES MAXIMUM IN
point_styleCUP
thread_class2A A
thread_length1.500 INCHES MAXIMUM IN
fastener_length1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_between_flats0.241 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
internal_drive_styleW/O INTERNAL DRIVE
nominal_thread_diameter0.250 INCHES IN
NSN5305-00-054-9263
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51955-8 · 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
•
HEAD STYLE: SQUARE
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
POINT STYLE: CUP
•
THREAD LENGTH: 1.500 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TYPE 2 CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
WIDTH BETWEEN FLATS: 0.241 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH20
HEAD STYLESQUARE
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
POINT STYLECUP
THREAD LENGTH1.500 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TYPE 2 CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
WIDTH BETWEEN FLATS0.241 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
A-020SR822-60Interchangeable
interchangeable cross-reference
interchangeable
GS570EM020Interchangeable
interchangeable cross-reference
interchangeable
MS29513-020Interchangeable
interchangeable cross-reference
interchangeable
700138Interchangeable
interchangeable cross-reference
interchangeable
155A37-1Interchangeable
interchangeable cross-reference
interchangeable
600-742-3-8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy MS51955-8?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MS51955-8?
MS51955-8 is a SETSCREW.
What parts can replace MS51955-8?
There are 11 known substitutes for MS51955-8: A-020SR822-60, GS570EM020, MS29513-020 and 8 more. Substitute compatibility should be verified for your specific system.
Is MS51955-8 still available?
MS51955-8 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MS51955-8

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026