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C20645-3-17 — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

C20645-3-17: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, grip_length: 1.062 INCHES NOMINAL IN, handle_diameter: 0.187 INCHES NOMINAL IN, special_features: MATERIAL: H11 ALLOY STEEL PER AMS 6487, surface_treatment: CADMIUM OVERALL, single_shear_strength: ERR-060. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-623-9302, 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
C20645-3-17
NSN: 5305-01-623-9302
FSC: 5305 — Screws
CAGE: 0K6Z0 — SATURN FASTENERS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
grip_length1.062 INCHES NOMINAL IN
handle_diameter0.187 INCHES NOMINAL IN
hardness_rating46.0 ROCKWELL C NOMINAL AND 47.0 ROCKWELL C NOMINAL AND 48.0 ROCKWELL C NOMINAL AND 49.0 ROCKWELL C NOMINAL AND 50.0 ROCKWELL C NOMINAL OVERALL
special_featuresMATERIAL: H11 ALLOY STEEL PER AMS 6487
surface_treatmentCADMIUM OVERALL
single_shear_strengthERR-060
supplementary_featuresSHANK NOT REQUIRED
minimum_tensile_strength220 POUNDS PER SQUARE INCH LBS
surface_treatment_document_and_classificationCADMIUM FLUOBORATE PLATE PER NAS672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5305-01-623-9302
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: C20645-3-17 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: CADMIUM FLUOBORATE PLATE PER NAS672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
SUPPLEMENTARY FEATURES: SHANK NOT REQUIRED
•
HARDNESS RATING: 46.0 ROCKWELL C NOMINAL AND 47.0 ROCKWELL C NOMINAL AND 48.0 ROCKWELL C NOMINAL AND 49.0 ROCKWELL C NOMINAL AND 50.0 ROCKWELL C NOMINAL OVERALL
•
SINGLE SHEAR STRENGTH: ERR-060
•
GRIP LENGTH: 1.062 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MINIMUM TENSILE STRENGTH: 220 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONCADMIUM FLUOBORATE PLATE PER NAS672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SUPPLEMENTARY FEATURESSHANK NOT REQUIRED
HARDNESS RATING46.0 ROCKWELL C NOMINAL AND 47.0 ROCKWELL C NOMINAL AND 48.0 ROCKWELL C NOMINAL AND 49.0 ROCKWELL C NOMINAL AND 50.0 ROCKWELL C NOMINAL OVERALL
SINGLE SHEAR STRENGTHERR-060
GRIP LENGTH1.062 INCHES NOMINAL IN
SPECIAL FEATURESMATERIAL: H11 ALLOY STEEL PER AMS 6487
SURFACE TREATMENTCADMIUM OVERALL
MINIMUM TENSILE STRENGTH220 POUNDS PER SQUARE INCH LBS
MATERIALSTEEL OVERALL
HANDLE DIAMETER0.187 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-001-5016 5305-00-001-9160 5305-00-001-9629 5305-00-001-9742 5305-00-001-9768 5305-00-003-4306 5305-00-003-6694 5305-00-003-6753
SUBSTITUTES & CROSS-REFERENCES 5
93926-3-17Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
VT10021-3-17Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SF116-3-17Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
ALC618-3-17Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
GS1009-3-17Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 C20645-3-17?
C20645-3-17 is a SCREW,CLOSE TOLERANCE.
What parts can replace C20645-3-17?
There are 5 known substitutes for C20645-3-17: 93926-3-17, VT10021-3-17, SF116-3-17 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C20645-3-17?
C20645-3-17 is cataloged in the U.S. Government catalog under NSN 5305-01-623-9302. 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.