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ST1229P3 — STUD,RECESSED AND STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

ST1229P3: STUD,RECESSED AND STEPPED.

The STUD,RECESSED AND STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8735, thread_class: 3A NUT THREAD A, thread_length: 0.500 INCHES MAXIMUM NUT THREAD IN, overall_length: 1.562 INCHES NOMINAL IN, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM, special_features: STUD END THREAD 0.003 IN. OVERSIZE IN.

This part is cataloged in the U.S. Government catalog under NSN 5307-00-479-4540, 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
ST1229P3
NSN: 5307-00-479-4540
FSC: 5307 — Studs
CAGE: 73342 — ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC (USA)
SPECIFICATIONS
materialSTEEL COMP 8735
thread_class3A NUT THREAD A
thread_length0.500 INCHES MAXIMUM NUT THREAD IN
overall_length1.562 INCHES NOMINAL IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
special_featuresSTUD END THREAD 0.003 IN. OVERSIZE IN
style_designatorRECESSED AND STEPPED
thread_directionRIGHT-HAND NUT THREAD
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.250 INCHES NUT THREAD IN
thread_pitch_diameters+0.2819 TO 0.2834 INCHES STUD THREAD IN
thread_quantity_per_inch28 NUT THREAD
NSN5307-00-479-4540
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ST1229P3 · 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 LENGTH: 0.500 INCHES MAXIMUM NUT THREAD IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: RECESSED AND STEPPED
•
THREAD PITCH DIAMETERS: +0.2819 TO 0.2834 INCHES STUD THREAD IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6320 ASSN STD SINGLE MATERIAL RESPONSE
•
DIAMETER OF RECESSED PORTION OF SHANK: 0.203 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.500 INCHES MAXIMUM NUT THREAD IN
THREAD LENGTH0.500 INCHES MAXIMUM STUD THREAD IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORRECESSED AND STEPPED
THREAD PITCH DIAMETERS+0.2819 TO 0.2834 INCHES STUD THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6320 ASSN STD SINGLE MATERIAL RESPONSE
OVERALL LENGTH1.562 INCHES NOMINAL IN
DIAMETER OF RECESSED PORTION OF SHANK0.203 INCHES NOMINAL 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 1
ST1229P003Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST1229P3?
ST1229P3 is a STUD,RECESSED AND STEPPED.
What parts can replace ST1229P3?
There is 1 known substitute for ST1229P3: ST1229P003. Substitute compatibility should be verified for your specific system.
What is the NSN for ST1229P3?
ST1229P3 is cataloged in the U.S. Government catalog under NSN 5307-00-479-4540. 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.