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NCS-4S-2-8 — STUD,SELF-LOCKING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

NCS-4S-2-8: STUD,SELF-LOCKING.

The STUD,SELF-LOCKING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303, head_length: 0.053 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN, thread_class: 2B NUT THREAD, head_diameter: 0.155 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN, thread_length: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM NUT THREAD IN, overall_length: 0.274 INCHES MINIMUM AND 0.304 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-961-2001, 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
NCS-4S-2-8
NSN: 5307-00-961-2001
NIINs: 009612001, 011857320
FSC: 5307 — Studs
CAGE: 71313 — VIKING TECHNOLOGIES, LTD. (USA)
SPECIFICATIONS
materialSTEEL COMP 303
head_length0.053 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
thread_class2B NUT THREAD
head_diameter0.155 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN
thread_length0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM NUT THREAD IN
overall_length0.274 INCHES MINIMUM AND 0.304 INCHES MAXIMUM IN
locking_featureSELF-CLINCHING HEAD
style_designatorSELF-LOCKING
thread_directionRIGHT-HAND NUT THREAD
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.112 INCHES NUT THREAD IN
distance_across_flats0.188 INCHES NOMINAL IN
NSN5307-00-961-2001
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: NCS-4S-2-8 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072,E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM NUT THREAD IN
•
STYLE DESIGNATOR: SELF-LOCKING
•
NOMINAL THREAD SIZE: 0.250 INCHES NUT THREAD IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
THREAD QUANTITY PER INCH: 28 NUT THREAD
•
MATERIAL: STEEL COMP 304 OR STEEL COMP 304L
•
DISTANCE ACROSS FLATS: 0.438 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072,E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM NUT THREAD IN
STYLE DESIGNATORSELF-LOCKING
NOMINAL THREAD SIZE0.250 INCHES NUT THREAD IN
SURFACE TREATMENTPASSIVATE OVERALL
THREAD QUANTITY PER INCH28 NUT THREAD
MATERIALSTEEL COMP 304 OR STEEL COMP 304L
DISTANCE ACROSS FLATS0.438 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNF NUT THREAD
HEAD DIAMETER0.380 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
34S(0.062)-ST-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
860336-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NCS-4S-2-8?
NCS-4S-2-8 is a STUD,SELF-LOCKING.
What parts can replace NCS-4S-2-8?
There are 2 known substitutes for NCS-4S-2-8: 34S(0.062)-ST-8, 860336-2. Substitute compatibility should be verified for your specific system.
What is the NSN for NCS-4S-2-8?
NCS-4S-2-8 is cataloged in the U.S. Government catalog under NSN 5307-00-961-2001. This indicates validated use in U.S. government and defense supply chains.
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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.