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2143S135 — STUD,STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2143S135: STUD,STEPPED.

The STUD,STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8735, thread_class: 3A NUT THREAD A, thread_length: 0.540 INCHES MINIMUM NUT THREAD IN, overall_length: 1.780 INCHES MINIMUM AND 1.782 INCHES MAXIMUM IN, shank_diameter: 0.223 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-149-5256, 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
2143S135
NSN: 5307-00-149-5256
FSC: 5307 — Studs
CAGE: 0AHP5 — CURTISS-WRIGHT CONTROLS, INC. DIV ACTUATION DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 8735
thread_class3A NUT THREAD A
thread_length0.540 INCHES MINIMUM NUT THREAD IN
overall_length1.780 INCHES MINIMUM AND 1.782 INCHES MAXIMUM IN
shank_diameter0.223 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
special_featuresSTUD END THREAD 0.007 IN. OVERSIZE IN
style_designatorSTEPPED
thread_directionRIGHT-HAND NUT THREAD
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.312 INCHES STUD THREAD IN
thread_pitch_diameters+0.2887 TO 0.2897 INCHES STUD THREAD IN
NSN5307-00-149-5256
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2143S135 · 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
•
SHANK DIAMETER: 0.223 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.430 INCHES MINIMUM STUD THREAD IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: STEPPED
•
THREAD PITCH DIAMETERS: +0.2887 TO 0.2897 INCHES STUD THREAD IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6320 ASSN STD SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.223 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
THREAD LENGTH0.430 INCHES MINIMUM STUD THREAD IN
THREAD LENGTH0.540 INCHES MINIMUM NUT THREAD IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSTEPPED
THREAD PITCH DIAMETERS+0.2887 TO 0.2897 INCHES STUD THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6320 ASSN STD SINGLE MATERIAL RESPONSE
OVERALL LENGTH1.780 INCHES MINIMUM AND 1.782 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
OTHER ITEMS IN FSC 5307 — Studs
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5307-00-000-6436 5307-00-001-1578 5307-00-001-1761 5307-00-001-2366 5307-00-001-4491 5307-00-001-4624 5307-00-001-4625
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2143S135?
2143S135 is a STUD,STEPPED.
What is the NSN for 2143S135?
2143S135 is cataloged in the U.S. Government catalog under NSN 5307-00-149-5256. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.