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127664P8 — STUD,SHOULDERED AND STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

127664P8: STUD,SHOULDERED AND STEPPED.

The STUD,SHOULDERED AND STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8735, thread_class: 3A NUT THREAD A, thread_length: 0.562 INCHES MINIMUM NUT THREAD IN, overall_length: 2.050 INCHES MINIMUM AND 2.070 INCHES MAXIMUM IN, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM, shoulder_length: 0.093 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-149-4787, 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
127664P8
NSN: 5307-00-149-4787
FSC: 5307 — Studs
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 8735
thread_class3A NUT THREAD A
thread_length0.562 INCHES MINIMUM NUT THREAD IN
overall_length2.050 INCHES MINIMUM AND 2.070 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
shoulder_length0.093 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
style_designatorSHOULDERED AND STEPPED
thread_directionRIGHT-HAND STUD THREAD
shoulder_diameter0.548 INCHES MINIMUM AND 0.552 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.375 INCHES NUT THREAD IN
nut_end_shank_length0.278 INCHES MINIMUM AND 0.298 INCHES MAXIMUM IN
NSN5307-00-149-4787
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 127664P8 · 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
•
NUT END SHANK DIAMETER: 0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.562 INCHES MINIMUM NUT THREAD IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SHOULDERED AND STEPPED
•
THREAD PITCH DIAMETERS: +0.4040 TO 0.4063 INCHES STUD THREAD IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 6320 ASSN STD SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS
NUT END SHANK DIAMETER0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN
THREAD LENGTH0.562 INCHES MINIMUM NUT THREAD IN
THREAD LENGTH0.938 INCHES MINIMUM STUD THREAD IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSHOULDERED AND STEPPED
THREAD PITCH DIAMETERS+0.4040 TO 0.4063 INCHES STUD THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6320 ASSN STD SINGLE MATERIAL RESPONSE
OVERALL LENGTH2.050 INCHES MINIMUM AND 2.070 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 1
127664P008Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 127664P8?
127664P8 is a STUD,SHOULDERED AND STEPPED.
What parts can replace 127664P8?
There is 1 known substitute for 127664P8: 127664P008. Substitute compatibility should be verified for your specific system.
What is the NSN for 127664P8?
127664P8 is cataloged in the U.S. Government catalog under NSN 5307-00-149-4787. 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.