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Technical Data Sheet
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2057G139 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2057G139: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include head_height: 0.019 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.655 INCHES NOMINAL IN, thread_length: 0.600 INCHES NOMINAL IN, fastener_length: 1.420 INCHES NOMINAL IN, distance_from_centerline_to_flat: 0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-004-1931, 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
2057G139
NSN: 5306-01-004-1931
FSC: 5306 — Bolts
CAGE: 0AHP5 — CURTISS-WRIGHT CONTROLS, INC. DIV ACTUATION DIVISION (USA)
SPECIFICATIONS
head_height0.019 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.655 INCHES NOMINAL IN
thread_length0.600 INCHES NOMINAL IN
fastener_length1.420 INCHES NOMINAL IN
distance_from_centerline_to_flat0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
NSN5306-01-004-1931
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2057G139 · 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: 0.019 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.420 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO FLAT: 0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.600 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
•
HEAD DIAMETER: 0.655 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.019 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
FASTENER LENGTH1.420 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO FLAT0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
THREAD LENGTH0.600 INCHES NOMINAL IN
THREAD CLASS3A A
HEAD DIAMETER0.655 INCHES NOMINAL IN
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
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2057G139?
2057G139 is a BOLT,SHOULDER.
What is the NSN for 2057G139?
2057G139 is cataloged in the U.S. Government catalog under NSN 5306-01-004-1931. 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.