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138C049C20-1-16 — STUD,STEPPED

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

138C049C20-1-16: STUD,STEPPED.

The STUD,STEPPED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OR STEEL COMP 302, thread_class: 2A STUD THREAD A, thread_length: 0.437 INCHES NOMINAL STUD THREAD IN, overall_length: 1.687 INCHES NOMINAL IN, shank_diameter: 0.250 INCHES NOMINAL IN, style_designator: STEPPED. This part is cataloged in the U.S.

Government catalog under NSN 5307-01-006-4037, 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
138C049C20-1-16
NSN: 5307-01-006-4037
FSC: 5307 — Studs
CAGE: 97942 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OR STEEL COMP 302
thread_class2A STUD THREAD A
thread_length0.437 INCHES NOMINAL STUD THREAD IN
overall_length1.687 INCHES NOMINAL IN
shank_diameter0.250 INCHES NOMINAL IN
style_designatorSTEPPED
thread_directionRIGHT-HAND STUD THREAD
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.250 INCHES STUD THREAD IN
thread_quantity_per_inch28 STUD THREAD
thread_series_designatorUNF STUD THREAD
NSN5307-01-006-4037
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 138C049C20-1-16 · 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
•
SHANK DIAMETER: 0.250 INCHES NOMINAL IN
•
THREAD LENGTH: 0.437 INCHES NOMINAL STUD THREAD IN
•
STYLE DESIGNATOR: STEPPED
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.250 INCHES STUD THREAD IN
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.250 INCHES NOMINAL IN
THREAD LENGTH0.437 INCHES NOMINAL STUD THREAD IN
THREAD LENGTH0.410 INCHES NOMINAL NUT THREAD IN
STYLE DESIGNATORSTEPPED
OVERALL LENGTH1.687 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.250 INCHES STUD THREAD IN
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS2A STUD THREAD A
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
KNS1032S20-1-16Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 138C049C20-1-16?
138C049C20-1-16 is a STUD,STEPPED.
What parts can replace 138C049C20-1-16?
There is 1 known substitute for 138C049C20-1-16: KNS1032S20-1-16. Substitute compatibility should be verified for your specific system.
What is the NSN for 138C049C20-1-16?
138C049C20-1-16 is cataloged in the U.S. Government catalog under NSN 5307-01-006-4037. 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.