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122-5277655 ITEM 17 — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN, thread_length: 0.341 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN, screw_material: STEEL, fastener_length: 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System under NSN 5305-00-958-5245, 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
122-5277655 ITEM 17
NSN: 5305-00-958-5245
FSC: 5305
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
thread_length0.341 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN
screw_materialSTEEL
fastener_length0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.250 INCHES IN
screw_surface_treatmentCADMIUM AND CHROMATE
minimum_tensile_strength60000 POUNDS PER SQUARE INCH LBS
NSN5305-00-958-5245
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 122-5277655 ITEM 17 · 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
•
SCREW SURFACE TREATMENT: CADMIUM AND CHROMATE
•
HEAD DIAMETER: 0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OR MIL-C-81562,TY 2,CL MIL SPEC SINGLE TREATMENT RESPONSE
•
HEAD STYLE: FLAT COUNTERSUNK
•
MINIMUM TENSILE STRENGTH: 60000 POUNDS PER SQUARE INCH LBS
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OR ASTMA108 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD CLASS: 2A A
•
THREAD LENGTH: 0.341 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SCREW SURFACE TREATMENTCADMIUM AND CHROMATE
HEAD DIAMETER0.452 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OR MIL-C-81562,TY 2,CL MIL SPEC SINGLE TREATMENT RESPONSE
HEAD STYLEFLAT COUNTERSUNK
MINIMUM TENSILE STRENGTH60000 POUNDS PER SQUARE INCH LBS
SCREW MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OR ASTMA108 ASSN STD SINGLE MATERIAL RESPONSE
THREAD CLASS2A A
THREAD LENGTH0.341 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NONDEFINITIVE SPEC/STD DATA3 TYPE AND 2C STYLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 35
FF-B-171InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SSRI-1438RA1P16LO1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SR6DK25/7InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
18-307InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
240-1097-00InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
11389InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 122-5277655 ITEM 17?
122-5277655 ITEM 17 is a SCREW,MACHINE.
What parts can replace 122-5277655 ITEM 17?
There are 35 known substitutes for 122-5277655 ITEM 17: FF-B-171, SSRI-1438RA1P16LO1, SR6DK25/7 and 32 more. Substitute compatibility should be verified for your specific system.
Is 122-5277655 ITEM 17 still available?
122-5277655 ITEM 17 is currently cancelled.
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Last verified: September 2026