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878B-3SD-.562 — STUD,LOCKED IN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

878B-3SD-.562: STUD,LOCKED IN.

The STUD,LOCKED IN is a the manufacturer industrial component. Key specifications include material: STEEL COMP 416, thread_class: 2A NUT THREAD A, thread_length: 0.335 INCHES NOMINAL STUD THREAD IN, overall_length: 0.937 INCHES NOMINAL IN, hardness_rating: 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM, locking_feature: RING, LOCK KEYED. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-724-0616, 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
878B-3SD-.562
NSN: 5307-00-724-0616
FSC: 5307 — Studs
CAGE: 01556 — STANLEY ENGINEERED FASTENING LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 416
thread_class2A NUT THREAD A
thread_length0.335 INCHES NOMINAL STUD THREAD IN
overall_length0.937 INCHES NOMINAL IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
locking_featureRING, LOCK KEYED
shoulder_length0.040 INCHES NOMINAL IN
style_designatorLOCKED IN
thread_directionRIGHT-HAND NUT THREAD
shoulder_diameter0.239 INCHES NOMINAL IN
nominal_thread_size0.190 INCHES NUT THREAD IN
cotter_pin_hole_diameter0.070 INCHES NOMINAL FIRST HOLE IN
NSN5307-00-724-0616
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 878B-3SD-.562 · 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: 0.070 INCHES NOMINAL FIRST HOLE IN
•
THREAD LENGTH: 0.438 INCHES NOMINAL NUT THREAD IN
•
HARDNESS RATING: 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: LOCKED IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
TECHNICAL CHARACTERISTICS
COTTER PIN HOLE DIAMETER0.070 INCHES NOMINAL FIRST HOLE IN
THREAD LENGTH0.438 INCHES NOMINAL NUT THREAD IN
THREAD LENGTH0.335 INCHES NOMINAL STUD THREAD IN
HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORLOCKED IN
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE
OVERALL LENGTH0.937 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
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 1
69823C10-9Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 878B-3SD-.562?
878B-3SD-.562 is a STUD,LOCKED IN.
What parts can replace 878B-3SD-.562?
There is 1 known substitute for 878B-3SD-.562: 69823C10-9. Substitute compatibility should be verified for your specific system.
What is the NSN for 878B-3SD-.562?
878B-3SD-.562 is cataloged in the U.S. Government catalog under NSN 5307-00-724-0616. 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.