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159-54121-3 — BOLT,EYE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

159-54121-3: BOLT,EYE.

The BOLT,EYE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1020 OVERALL, thread_class: 3A A, thread_length: 0.500 INCHES NOMINAL IN, overall_length: 1.171 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, eye_outside_width: 0.438 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-657-8714, 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
159-54121-3
NSN: 5306-00-657-8714
FSC: 5306 — Bolts
CAGE: 28298 — SMITH AND SMITH AIRCRAFT CO (USA)
SPECIFICATIONS
materialSTEEL COMP 1020 OVERALL
thread_class3A A
thread_length0.500 INCHES NOMINAL IN
overall_length1.171 INCHES NOMINAL IN
thread_directionRIGHT-HAND
eye_outside_width0.438 INCHES NOMINAL IN
eye_stock_diameter0.250 INCHES NOMINAL IN
eye_inside_diameter0.125 INCHES NOMINAL IN
nominal_thread_diameter0.138 INCHES IN
thread_quantity_per_inch32
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationQQ-S-630 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5306-00-657-8714
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 159-54121-3 · 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
•
EYE STOCK DIAMETER: 0.250 INCHES NOMINAL IN
•
THREAD LENGTH: 0.500 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-630 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
EYE INSIDE DIAMETER: 0.125 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS
EYE STOCK DIAMETER0.250 INCHES NOMINAL IN
THREAD LENGTH0.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-630 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH1.171 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.138 INCHES IN
THREAD DIRECTIONRIGHT-HAND
EYE INSIDE DIAMETER0.125 INCHES NOMINAL IN
THREAD CLASS3A A
THREAD QUANTITY PER INCH32
MATERIALSTEEL COMP 1020 OVERALL
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 159-54121-3?
159-54121-3 is a BOLT,EYE.
What is the NSN for 159-54121-3?
159-54121-3 is cataloged in the U.S. Government catalog under NSN 5306-00-657-8714. 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.