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451665 ✓ 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,TAPPING is a the manufacturer industrial component. Key specifications include diameter: 0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN, material: STEEL COMP 4037 STUD, drive_type: SLOTTED, eyelet_length: 0.322 INCHES NOMINAL IN, stud_head_height: 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-087-0243, 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
451665
NSN: 5305-00-087-0243
FSC: 5305
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
diameter0.298 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
materialSTEEL COMP 4037 STUD
drive_typeSLOTTED
eyelet_length0.322 INCHES NOMINAL IN
stud_head_height0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
stud_assembly_styleSTUD ASSEMBLY
eyelet_outside_diameter0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
turnlock_stud_head_styleFLAT FILLISTER
material_accommodated_thickness0.120 INCHES MINIMUM AND 0.179 INCHES MAXIMUM IN
material_document_and_classificationASTM A322 ASSN STD 1ST MATERIAL RESPONSE AND ASTM A331 ASSN STD 2ND MATERIAL RESPONSE STUD
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5305-00-087-0243
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 451665 · 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
•
NONMACHINE THREAD STYLE: DOG TYPE (TYPE B OR C)
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.312 INCHES IN
•
HEAD STYLE: HEXAGON
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
WIDTH BETWEEN FLATS: 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
HEAD HEIGHT: 0.208 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NONMACHINE THREAD STYLEDOG TYPE (TYPE B OR C)
NONMACHINE NOMINAL THREAD DIAMETER0.312 INCHES IN
HEAD STYLEHEXAGON
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
WIDTH BETWEEN FLATS0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
HEAD HEIGHT0.208 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
FASTENER LENGTH1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
G205521-5Interchangeable
interchangeable cross-reference
interchangeable
R94TA05AInterchangeable
interchangeable cross-reference
interchangeable
DL038-1-23CInterchangeable
Same NIIN cross-reference
interchangeable
FF-S-107C TY B OR TY ABInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 451665?
451665 is a SCREW,TAPPING.
What parts can replace 451665?
There are 4 known substitutes for 451665: G205521-5, R94TA05A, DL038-1-23C and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 451665?
451665 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-087-0243. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026