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20-143 — LINE SECTION,RADIO FREQUENCY TRA

✓ Government record, cited
Exost · BOLT SCREW
PRODUCT OVERVIEW

20-143: LINE SECTION,RADIO FREQUENCY TRA.

Universal USB charger to charge your iPhone or smartphone at home or office - For use with any smartphone, iPhone or iPod - Flat and lightweight design with soft rubber coating - Uses USB charge cable supplied with your phone - Overload and short circuit protection - Works on 100-240V, ideal for travel This part is cataloged in the U.S. Government catalog under NSN 5305-00-115-6250, 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
20-143
NSN: 5305-00-115-6250
NIINs: 001156250, 001433049, 004476517, 010470052, 010600024, 011491051, 013002021, 015725809
FSC: 5305 — Screws
CAGE: 1VPW8 — GENERAL DYNAMICS MISSION SYSTEMS, INC. DBA GDMS (USA)
SPECIFICATIONS
materialSTEEL
head_styleHEXAGON EXTENDED WASHER
head_height0.160 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN
thread_class2A A
overall_width18.500 INCHES NOMINAL IN
thread_length0.735 INCHES MINIMUM AND 0.795 INCHES MAXIMUM IN
overall_length15.695 INCHES MINIMUM AND 15.705 INCHES MAXIMUM IN
fastener_length3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM IN
overall_diameter2.975 INCHES MINIMUM AND 2.980 INCHES MAXIMUM IN
special_featuresBRGS-INCL.;BRG TYPE-NEEDLE;BRG SHAPE-CYLINDERICAL;BRG QTY-4;MTG PROVISION-MTG EARS
thread_directionRIGHT-HAND
overall_thickness5.100 INCHES NOMINAL IN
NSN5305-00-115-6250
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20-143 · Exost ⚠ 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
•
EXTENDED WASHER THICKNESS: 0.015 INCHES MINIMUM AND 0.202 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.160 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN
•
FASTENER LENGTH: 3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: 135410027 FSCM 94990 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.735 INCHES MINIMUM AND 0.795 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
FIRST DIAMETER FROM HEAD: 0.166 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.015 INCHES MINIMUM AND 0.202 INCHES MAXIMUM IN
HEAD HEIGHT0.160 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN
FASTENER LENGTH3.110 INCHES MINIMUM AND 3.140 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION135410027 FSCM 94990 MFR REF SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN
THREAD LENGTH0.735 INCHES MINIMUM AND 0.795 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.166 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEHEXAGON EXTENDED WASHER
SUBSTITUTES & CROSS-REFERENCES 2
50711Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
3B41741A09Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20-143?
20-143 is a LINE SECTION,RADIO FREQUENCY TRA manufactured by Exost.
What parts can replace 20-143?
There are 2 known substitutes for 20-143: 50711, 3B41741A09. Substitute compatibility should be verified for your specific system.
What is the NSN for 20-143?
20-143 is cataloged in the U.S. Government catalog under NSN 5305-00-115-6250. 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.