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12A — SEMICONDUCTOR DEVICE,DIODE

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

12A: SEMICONDUCTOR DEVICE,DIODE.

The SEMICONDUCTOR DEVICE,DIODE is a the manufacturer industrial component. Key specifications include overall_width: 15.550 INCHES NOMINAL IN, overall_height: 4.130 INCHES NOMINAL IN, overall_length: 13.580 INCHES NOMINAL IN, criticality_code_justification: ZZZY, reference_number_differentiating_characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS. This part is cataloged in the U.S.

Government catalog under NSN 5120-00-277-1241, 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
MRO→ MRO_GENERAL→ 12A
NSN: 5120-00-277-1241
NIINs: 002771241, 002832897, 004651087, 004972125, 004990155, 007408901, 010088897, 010172939, 010835866, 011207507, 011317067, 012026748, 014076583, 014922316, 015273884, 015754809, 016257119, 016303146
FSC: 5120 — Hand Tools, Nonedged, Nonpowered
CAGE: 05506 — MARTIN SPROCKET AND GEAR INC (USA)
SPECIFICATIONS
overall_width15.550 INCHES NOMINAL IN
overall_height4.130 INCHES NOMINAL IN
overall_length13.580 INCHES NOMINAL IN
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS
NSN5120-00-277-1241
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SEMICONDUCTOR DEVICE,DIODE TITLE COMPONENT PN 12A MFR SEMICONDUCTOR DEVICE,D
KEY FEATURES
•
WRENCHING SURFACE SIZE: 2.062 INCHES NOMINAL SINGLE END IN
•
STYLE DESIGNATOR: SINGLE HEAD
•
NONDEFINITIVE SPEC/STD DATA: 5 TYPE
•
WRENCHING SURFACE SHAPE: OVAL SINGLE END INTERNAL
•
SURFACE TREATMENT: CHROMIUM AND OXIDE OVERALL
•
HEAD ANGLE: 15.0 DEGREES NOMINAL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
WRENCHING SURFACE SIZE2.062 INCHES NOMINAL SINGLE END IN
STYLE DESIGNATORSINGLE HEAD
OVERALL LENGTH18.000 INCHES MINIMUM IN
NONDEFINITIVE SPEC/STD DATA5 TYPE
WRENCHING SURFACE SHAPEOVAL SINGLE END INTERNAL
SURFACE TREATMENTCHROMIUM AND OXIDE OVERALL
HEAD ANGLE15.0 DEGREES NOMINAL
MATERIALSTEEL OVERALL
HEAD THICKNESS1.000 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
GGG-W-636 TY5Reference document
Same NSN cross-reference
Reference document — Secondary reference
GGG-W-636Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12A?
12A is a SEMICONDUCTOR DEVICE,DIODE. It is classified as a MRO (MRO_GENERAL).
What parts can replace 12A?
There are 2 known substitutes for 12A: GGG-W-636 TY5, GGG-W-636. Substitute compatibility should be verified for your specific system.
What is the NSN for 12A?
12A is cataloged in the U.S. Government catalog under NSN 5120-00-277-1241. 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.