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Technical Data Sheet
PartsTable / COMPONENT / 138399
138399 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.207 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN, thread_length: 0.120 INCHES MINIMUM IN, fastener_length: 0.260 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-369-2447, 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
138399
NSN: 5305-00-369-2447
FSC: 5305
CAGE: 06481 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.207 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
thread_length0.120 INCHES MINIMUM IN
fastener_length0.260 INCHES NOMINAL IN
special_featuresPELLET TYPE LOCKING FEATURE IN THREAD
thread_directionRIGHT-HAND
countersink_angle99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
surface_treatmentPASSIVATE OVERALL
internal_drive_styleW/O INTERNAL DRIVE
nominal_thread_diameter0.112 INCHES IN
NSN5305-00-369-2447
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 138399 · 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
•
INTERNAL DRIVE STYLE: W/O INTERNAL DRIVE
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
•
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY: 1
•
THREAD CLASS: 2A A
•
COUNTERSINK ANGLE: 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
•
FASTENER LENGTH: 0.260 INCHES NOMINAL IN
•
THREAD LENGTH: 0.120 INCHES MINIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL DRIVE STYLEW/O INTERNAL DRIVE
NOMINAL THREAD DIAMETER0.112 INCHES IN
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
THREAD CLASS2A A
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
SPECIAL FEATURESPELLET TYPE LOCKING FEATURE IN THREAD
FASTENER LENGTH0.260 INCHES NOMINAL IN
THREAD LENGTH0.120 INCHES MINIMUM IN
HEAD STYLEFLAT COUNTERSUNK
HEAD DIAMETER0.207 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
60819Interchangeable
interchangeable cross-reference
interchangeable
50313Interchangeable
interchangeable cross-reference
interchangeable
00044Interchangeable
interchangeable cross-reference
interchangeable
P423P00204Interchangeable
interchangeable cross-reference
interchangeable
C19A513Interchangeable
interchangeable cross-reference
interchangeable
19A513Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 138399?
138399 is a SCREW,EXTERNALLY RELIEVED BODY.
What parts can replace 138399?
There are 7 known substitutes for 138399: 60819, 50313, 00044 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 138399?
138399 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-369-2447. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026