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AS155066 — STUD,STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

AS155066: STUD,STEPPED.

The STUD,STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740, thread_class: 3A NUT THREAD A, thread_length: 0.562 INCHES MINIMUM AND 0.633 INCHES MAXIMUM NUT THREAD IN, overall_length: 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN, shank_diameter: 0.221 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES SHANK. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-257-2273, 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
AS155066
NSN: 5307-01-257-2273
FSC: 5307 — Studs
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 8740
thread_class3A NUT THREAD A
thread_length0.562 INCHES MINIMUM AND 0.633 INCHES MAXIMUM NUT THREAD IN
overall_length1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN
shank_diameter0.221 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES SHANK
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
style_designatorSTEPPED
thread_directionRIGHT-HAND STUD THREAD
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.312 INCHES STUD THREAD IN
thread_pitch_diameters+0.2930 TO 0.2945 INCHES STUD THREAD IN
NSN5307-01-257-2273
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AS155066 · 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: 0.221 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN
•
SURFACE FINISH: 32.0 MICROINCHES NUT THD
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM STUD THREAD IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.221 INCHES MINIMUM AND 0.231 INCHES MAXIMUM IN
SURFACE FINISH32.0 MICROINCHES NUT THD
SURFACE FINISH63.0 MICROINCHES SHANK
SURFACE FINISH32.0 MICROINCHES STUD THD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM STUD THREAD IN
THREAD LENGTH0.562 INCHES MINIMUM AND 0.633 INCHES MAXIMUM NUT THREAD IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSTEPPED
THREAD PITCH DIAMETERS+0.2930 TO 0.2945 INCHES STUD THREAD IN
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 1
AN155066Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS155066?
AS155066 is a STUD,STEPPED.
What parts can replace AS155066?
There is 1 known substitute for AS155066: AN155066. Substitute compatibility should be verified for your specific system.
What is the NSN for AS155066?
AS155066 is cataloged in the U.S. Government catalog under NSN 5307-01-257-2273. 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.