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2057D139 — BOLT,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2057D139: BOLT,EXTERNALLY RELIEVED BODY.

The BOLT,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 431 OVERALL, head_style: DEE CHAMFER, head_height: 0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.655 INCHES NOMINAL IN, thread_length: 0.590 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-012-9400, 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
2057D139
NSN: 5306-01-012-9400
FSC: 5306 — Bolts
CAGE: 0AHP5 — CURTISS-WRIGHT CONTROLS, INC. DIV ACTUATION DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 431 OVERALL
head_styleDEE CHAMFER
head_height0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.655 INCHES NOMINAL IN
thread_length0.590 INCHES NOMINAL IN
fastener_length1.420 INCHES NOMINAL IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
nominal_thread_diameter0.375 INCHES IN
first_diameter_from_head0.3902 INCHES MINIMUM AND 0.3906 INCHES MAXIMUM IN
third_diameter_from_head0.3902 INCHES MINIMUM AND 0.3906 INCHES MAXIMUM IN
NSN5306-01-012-9400
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2057D139 · 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
•
FOURTH DIAMETER FROM HEAD: 0.300 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.190 INCHES MINIMUM AND 0.200 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: 0.590 INCHES NOMINAL IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
CRITICALITY CODE JUSTIFICATION: AAWC AND AAWE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5628 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
FOURTH DIAMETER FROM HEAD0.300 INCHES NOMINAL IN
HEAD HEIGHT0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
FASTENER LENGTH1.420 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO FLAT0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN
THREAD LENGTH0.590 INCHES NOMINAL IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
CRITICALITY CODE JUSTIFICATIONAAWC AND AAWE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5628 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FIRST DIAMETER FROM HEAD0.3902 INCHES MINIMUM AND 0.3906 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER0.460 INCHES MINIMUM AND 0.480 INCHES MAXIMUM 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 2057D139?
2057D139 is a BOLT,EXTERNALLY RELIEVED BODY.
What is the NSN for 2057D139?
2057D139 is cataloged in the U.S. Government catalog under NSN 5306-01-012-9400. 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.