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12-78-50 — LINE SECTION,RADIO FREQUENCY TRA

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

12-78-50: LINE SECTION,RADIO FREQUENCY TRA.

LINE SECTION,RADIO FREQUENCY TRA. Key specifications include head_style: FLAT CHAMFER, head_height: 0.125 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.125 INCHES NOMINAL IN, thread_length: 0.469 INCHES MINIMUM IN, overall_length: 2.688 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-206-7859, 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
12-78-50
NSN: 5305-00-206-7859
NIINs: 002067859, 013407908, 015165123
FSC: 5305 — Screws
CAGE: 99551 — GOODRICH CORPORATION DBA GOODRICH CORP (USA)
SPECIFICATIONS
head_styleFLAT CHAMFER
head_height0.125 INCHES NOMINAL IN
thread_class3A A
head_diameter0.125 INCHES NOMINAL IN
thread_length0.469 INCHES MINIMUM IN
overall_length2.688 INCHES NOMINAL IN
screw_materialSTEEL COMP 8740
fastener_length0.531 INCHES NOMINAL IN
hardness_rating28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
overall_diameter0.810 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleSLOT
NSN5305-00-206-7859
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 12-78-50 · 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
•
HEAD HEIGHT: 0.125 INCHES NOMINAL IN
•
SCREW SURFACE TREATMENT: CADMIUM
•
FASTENER LENGTH: 0.531 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 0.469 INCHES MINIMUM IN
•
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.125 INCHES NOMINAL IN
SCREW SURFACE TREATMENTCADMIUM
FASTENER LENGTH0.531 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE
THREAD LENGTH0.469 INCHES MINIMUM IN
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL COMP 8740
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12-78-50?
12-78-50 is a LINE SECTION,RADIO FREQUENCY TRA.
What is the NSN for 12-78-50?
12-78-50 is cataloged in the U.S. Government catalog under NSN 5305-00-206-7859. 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.