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577R005H77 — BOLT,INTERNAL WRENCHING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

577R005H77: BOLT,INTERNAL WRENCHING.

The BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL, head_style: FLAT CHAMFER, head_height: 0.190 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.275 INCHES MAXIMUM IN, thread_length: 0.670 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-049-0622, 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
577R005H77
NSN: 5306-01-049-0622
FSC: 5306 — Bolts
CAGE: 97942 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL
head_styleFLAT CHAMFER
head_height0.190 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.275 INCHES MAXIMUM IN
thread_length0.670 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
fastener_length1.390 INCHES MINIMUM AND 1.410 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.190 INCHES IN
NSN5306-01-049-0622
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 577R005H77 · 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: 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.190 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.390 INCHES MINIMUM AND 1.410 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.670 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
•
FIRST DIAMETER FROM HEAD: 0.145 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
HEAD HEIGHT0.190 INCHES MAXIMUM IN
FASTENER LENGTH1.390 INCHES MINIMUM AND 1.410 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.670 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
FIRST DIAMETER FROM HEAD0.145 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.700 INCHES MINIMUM AND 0.740 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 1
D791519-77Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 577R005H77?
577R005H77 is a BOLT,INTERNAL WRENCHING.
What parts can replace 577R005H77?
There is 1 known substitute for 577R005H77: D791519-77. Substitute compatibility should be verified for your specific system.
What is the NSN for 577R005H77?
577R005H77 is cataloged in the U.S. Government catalog under NSN 5306-01-049-0622. 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.