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877CW-4SB-43 — STUD,LOCKED IN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

877CW-4SB-43: STUD,LOCKED IN.

The STUD,LOCKED IN is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 3A NUT THREAD A, overall_length: 1.031 INCHES NOMINAL IN, locking_feature: RING, LOCK KEYED, style_designator: LOCKED IN, thread_direction: RIGHT-HAND STUD THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-139-6823, 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
877CW-4SB-43
NSN: 5307-01-139-6823
FSC: 5307 — Studs
CAGE: 01556 — STANLEY ENGINEERED FASTENING LLC (USA)
SPECIFICATIONS
materialSTEEL
thread_class3A NUT THREAD A
overall_length1.031 INCHES NOMINAL IN
locking_featureRING, LOCK KEYED
style_designatorLOCKED IN
thread_directionRIGHT-HAND STUD THREAD
nominal_thread_size0.312 INCHES STUD THREAD IN
thread_quantity_per_inch24 STUD THREAD
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) STUD THREAD
NSN5307-01-139-6823
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 877CW-4SB-43 · 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
•
STYLE DESIGNATOR: LOCKED IN
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.250 INCHES NUT THREAD IN
•
LOCKING FEATURE: RING, LOCK KEYED
•
THREAD CLASS: 3A NUT THREAD A
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORLOCKED IN
OVERALL LENGTH1.031 INCHES NOMINAL 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
LOCKING FEATURERING, LOCK KEYED
THREAD CLASS3A NUT THREAD A
THREAD CLASS3A STUD THREAD A
THREAD QUANTITY PER INCH24 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 1
4058T30P03Same 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 877CW-4SB-43?
877CW-4SB-43 is a STUD,LOCKED IN.
What parts can replace 877CW-4SB-43?
There is 1 known substitute for 877CW-4SB-43: 4058T30P03. Substitute compatibility should be verified for your specific system.
What is the NSN for 877CW-4SB-43?
877CW-4SB-43 is cataloged in the U.S. Government catalog under NSN 5307-01-139-6823. 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.