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634H2 — STUD,RECESSED AND STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

634H2: STUD,RECESSED AND STEPPED.

The STUD,RECESSED AND STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 3A NUT THREAD A, thread_length: 0.580 INCHES MINIMUM STUD THREAD IN, overall_length: 2.130 INCHES MINIMUM AND 2.170 INCHES MAXIMUM IN, hardness_rating: 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM, thread_direction: RIGHT-HAND NUT THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-945-4769, 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
634H2
NSN: 5307-00-945-4769
FSC: 5307 — Studs
CAGE: 0AHP5 — CURTISS-WRIGHT CONTROLS, INC. DIV ACTUATION DIVISION (USA)
SPECIFICATIONS
materialSTEEL
thread_class3A NUT THREAD A
thread_length0.580 INCHES MINIMUM STUD THREAD IN
overall_length2.130 INCHES MINIMUM AND 2.170 INCHES MAXIMUM IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND NUT THREAD
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.250 INCHES NUT THREAD IN
distance_across_flats0.200 INCHES NOMINAL IN
thread_pitch_diameters+0.2840 TO 0.2855 INCHES STUD THREAD IN
thread_quantity_per_inch18 STUD THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) STUD THREAD
NSN5307-00-945-4769
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 634H2 · 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: 0.580 INCHES MINIMUM STUD THREAD IN
•
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM
•
THREAD PITCH DIAMETERS: +0.2840 TO 0.2855 INCHES STUD THREAD IN
•
DIAMETER OF RECESSED PORTION OF SHANK: 0.180 INCHES MINIMUM AND 0.184 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
TECHNICAL CHARACTERISTICS
THREAD LENGTH0.580 INCHES MINIMUM STUD THREAD IN
THREAD LENGTH0.510 INCHES MINIMUM NUT THREAD IN
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM
THREAD PITCH DIAMETERS+0.2840 TO 0.2855 INCHES STUD THREAD IN
OVERALL LENGTH2.130 INCHES MINIMUM AND 2.170 INCHES MAXIMUM IN
DIAMETER OF RECESSED PORTION OF SHANK0.180 INCHES MINIMUM AND 0.184 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.250 INCHES NUT THREAD IN
NOMINAL THREAD SIZE0.312 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 634H2?
634H2 is a STUD,RECESSED AND STEPPED.
What is the NSN for 634H2?
634H2 is cataloged in the U.S. Government catalog under NSN 5307-00-945-4769. 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.