PartsTable
Technical Data Sheet
X19857 ✓ 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 STUD,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8637 OR STEEL COMP 8640, thread_class: 3A NUT THREAD A, thread_length: 1.312 INCHES NOMINAL NUT THREAD IN, overall_length: 3.750 INCHES NOMINAL IN, hardness_rating: 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM, thread_direction: RIGHT-HAND STUD THREAD. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-809-9405, 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
X19857
NSN: 5307-00-809-9405
FSC: 5307
CAGE: 14351 — TELEDYNE CONTINENTAL MOTORS INDUSTRIAL PRODUCTS DIV TELEDYNE INDUSTRIES INC SUB OF TELEDYNE INC (USA)
SPECIFICATIONS
materialSTEEL COMP 8637 OR STEEL COMP 8640
thread_class3A NUT THREAD A
thread_length1.312 INCHES NOMINAL NUT THREAD IN
overall_length3.750 INCHES NOMINAL IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND STUD THREAD
nominal_thread_size0.438 INCHES NUT THREAD IN
thread_pitch_diameters+0.3930 TO 0.3959 INCHES STUD THREAD IN
thread_quantity_per_inch14 STUD THREAD
thread_series_designatorUNF NUT THREAD
NSN5307-00-809-9405
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: X19857 · 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 NUT THREAD
THREAD DIRECTION: RIGHT-HAND STUD THREAD
THREAD CLASS: 3A NUT THREAD A
NOMINAL THREAD SIZE: 0.438 INCHES STUD THREAD IN
THREAD SERIES DESIGNATOR: UNS STUD THREAD
THREAD LENGTH: 1.312 INCHES NOMINAL NUT THREAD IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH20 NUT THREAD
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD CLASS3A NUT THREAD A
NOMINAL THREAD SIZE0.438 INCHES STUD THREAD IN
NOMINAL THREAD SIZE0.438 INCHES NUT THREAD IN
THREAD QUANTITY PER INCH14 STUD THREAD
THREAD SERIES DESIGNATORUNS STUD THREAD
THREAD LENGTH1.312 INCHES NOMINAL NUT THREAD IN
MATERIALSTEEL COMP 8637 OR STEEL COMP 8640
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
58914Interchangeable
interchangeable cross-reference
interchangeable
20X9Interchangeable
interchangeable cross-reference
interchangeable
C3024Interchangeable
interchangeable cross-reference
interchangeable
058914Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X19857?
X19857 is a STUD,PLAIN.
What parts can replace X19857?
There are 4 known substitutes for X19857: 58914, 20X9, C3024 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for X19857?
X19857 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-809-9405. This indicates validated use in U.S. government and defense supply chains.
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