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2057-1591 — BOLT,INTERNAL WRENCHING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2057-1591: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 416SE OVERALL, head_style: FLAT CHAMFER, head_height: 0.108 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.178 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN, thread_length: 0.235 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-685-1934, 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
2057-1591
NSN: 5306-00-685-1934
FSC: 5306 — Bolts
CAGE: 49956 — RAYTHEON COMPANY DIV CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 416SE OVERALL
head_styleFLAT CHAMFER
head_height0.108 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.178 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN
thread_length0.235 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN
fastener_length0.455 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
internal_drive_styleHEXAGON
NSN5306-00-685-1934
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2057-1591 · 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
•
WIDTH ACROSS FLATS: 0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.108 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.455 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.235 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
•
FIRST DIAMETER FROM HEAD: 0.093 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER: 0.075 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.112 INCHES IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
HEAD HEIGHT0.108 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
FASTENER LENGTH0.455 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
THREAD LENGTH0.235 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL
FIRST DIAMETER FROM HEAD0.093 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER0.075 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.112 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2057-1591?
2057-1591 is a BOLT,INTERNAL WRENCHING.
What is the NSN for 2057-1591?
2057-1591 is cataloged in the U.S. Government catalog under NSN 5306-00-685-1934. 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.