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CA21351-5-6RS — SCREW,CLOSE TOLERANCE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

CA21351-5-6RS: SCREW,CLOSE TOLERANCE.

The SCREW,CLOSE TOLERANCE is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, head_style: FLAT COUNTERSUNK, grip_length: 0.291 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN, point_style: CHAMFER DOG, point_length: 0.100 INCHES NOMINAL IN, thread_class: 3A A. This part is cataloged in the U.S.

Government catalog under NSN 5305-01-537-3783, 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
CA21351-5-6RS
NSN: 5305-01-537-3783
FSC: 5305 — Screws
CAGE: 29372 — HOWMET GLOBAL FASTENING SYSTEMS INC. DIV TRIDAIR PRODUCTS (USA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
head_styleFLAT COUNTERSUNK
grip_length0.291 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
point_styleCHAMFER DOG
point_length0.100 INCHES NOMINAL IN
thread_class3A A
grip_diameter0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
head_diameter0.542 INCHES NOMINAL IN
thread_length0.722 INCHES MINIMUM AND 0.771 INCHES MAXIMUM IN
point_diameter0.267 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN
fastener_length1.302 INCHES NOMINAL IN
locking_featureDETENT RING LOCKING FEATURE
NSN5305-01-537-3783
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: CA21351-5-6RS · 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
•
POINT DIAMETER: 0.267 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN
•
POINT LENGTH: 0.100 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.302 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS QQ-P-35 NATIONAL STD/SPEC ALL TREATMENT RESPONSES OVERALL
•
THREAD LENGTH: 0.722 INCHES MINIMUM AND 0.771 INCHES MAXIMUM IN
•
SUPPLEMENTARY FEATURES: STUD BOLTS SHALL HAVE POLYPROPLENE HEAD PROTECTIVE RING INSTALLED FOR SHIPPING, CUSTOMER TO REMOVE RING BEFORE INSTALLING
•
MATERIAL DOCUMENT AND CLASSIFICATION: MS 5731 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OR AMS 5737 NATIONAL STD/SPEC 2ND MATERIAL RESPONSE OVERALL
•
POINT CHAMFER ANGLE: 45.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS
POINT DIAMETER0.267 INCHES MINIMUM AND 0.272 INCHES MAXIMUM IN
POINT LENGTH0.100 INCHES NOMINAL IN
FASTENER LENGTH1.302 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS QQ-P-35 NATIONAL STD/SPEC ALL TREATMENT RESPONSES OVERALL
THREAD LENGTH0.722 INCHES MINIMUM AND 0.771 INCHES MAXIMUM IN
SUPPLEMENTARY FEATURESSTUD BOLTS SHALL HAVE POLYPROPLENE HEAD PROTECTIVE RING INSTALLED FOR SHIPPING, CUSTOMER TO REMOVE RING BEFORE INSTALLING
MATERIAL DOCUMENT AND CLASSIFICATIONMS 5731 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OR AMS 5737 NATIONAL STD/SPEC 2ND MATERIAL RESPONSE OVERALL
POINT CHAMFER ANGLE45.0 DEGREES NOMINAL
SINGLE SHEAR STRENGTHERR-060
NOMINAL THREAD DIAMETER0.312 INCHES IN
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is CA21351-5-6RS?
CA21351-5-6RS is a SCREW,CLOSE TOLERANCE.
What is the NSN for CA21351-5-6RS?
CA21351-5-6RS is cataloged in the U.S. Government catalog under NSN 5305-01-537-3783. 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.