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71688-4 — STUD,STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

71688-4: STUD,STEPPED.

The STUD,STEPPED is a the manufacturer industrial component. Key specifications include thread_class: 3A NUT THREAD A, style_designator: STEPPED, thread_direction: RIGHT-HAND STUD THREAD, nominal_thread_size: 0.375 INCHES STUD THREAD IN, cotter_pin_hole_diameter: 0.071 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN, thread_quantity_per_inch: 16 STUD THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-772-4974, 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
71688-4
NSN: 5307-00-772-4974
FSC: 5307 — Studs
CAGE: 11599 — TRIUMPH ENGINE CONTROL SYSTEMS LLC (USA)
SPECIFICATIONS
thread_class3A NUT THREAD A
style_designatorSTEPPED
thread_directionRIGHT-HAND STUD THREAD
nominal_thread_size0.375 INCHES STUD THREAD IN
cotter_pin_hole_diameter0.071 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN
thread_quantity_per_inch16 STUD THREAD
thread_series_designatorUNF NUT THREAD
NSN5307-00-772-4974
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 71688-4 · 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
•
COTTER PIN HOLE DIAMETER: 0.071 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN
•
STYLE DESIGNATOR: STEPPED
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.312 INCHES NUT THREAD IN
•
THREAD CLASS: 3A NUT THREAD A
TECHNICAL CHARACTERISTICS
COTTER PIN HOLE DIAMETER0.071 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN
STYLE DESIGNATORSTEPPED
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.312 INCHES NUT THREAD IN
NOMINAL THREAD SIZE0.375 INCHES STUD THREAD IN
THREAD CLASS3A NUT THREAD A
THREAD CLASS3A STUD THREAD A
THREAD QUANTITY PER INCH24 NUT THREAD
THREAD QUANTITY PER INCH16 STUD 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 71688-4?
71688-4 is a STUD,STEPPED.
What is the NSN for 71688-4?
71688-4 is cataloged in the U.S. Government catalog under NSN 5307-00-772-4974. 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.