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PartsTable / COMPONENT / AN550B2R6
AN550B2R6 ✓ 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,WOOD is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 260 OR COPPER ALLOY 268 OR COPPER ALLOY 270 OVERALL, head_style: FLAT COUNTERSUNK, head_diameter: 0.150 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN, fastener_length: 0.710 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, countersink_angle: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM, internal_drive_style: CROSS RECESS TYPE 1. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-180-1631, 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
AN550B2R6
NSN: 5305-00-180-1631
FSC: 5305
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialCOPPER ALLOY 260 OR COPPER ALLOY 268 OR COPPER ALLOY 270 OVERALL
head_styleFLAT COUNTERSUNK
head_diameter0.150 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
fastener_length0.710 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleCROSS RECESS TYPE 1
nonmachine_thread_styleGIMLET POINT (TYPE A, AB OR BA)
nonmachine_nominal_thread_diameter0.086 INCHES IN
NSN5305-00-180-1631
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AN550B2R6 · 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
•
MATERIAL: COPPER ALLOY 260 OR COPPER ALLOY 268 OR COPPER ALLOY 270 OVERALL
•
FASTENER LENGTH: 0.710 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-613 AL 260 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626 AL 260 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-613 AL 268 FED SPEC 2ND MATERIAL RESPONSE OR QQ-B-626 AL 268 FED SPEC 2ND MATERIAL RESPONSE OR QQ-W-321 AL 270 FED SPEC 3RD MATERIAL RESPONSE OVERALL
•
NONMACHINE NOMINAL THREAD DIAMETER: 0.086 INCHES IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
COUNTERSINK ANGLE: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
•
HEAD STYLE: FLAT COUNTERSUNK
•
NONMACHINE THREAD STYLE: GIMLET POINT (TYPE A, AB OR BA)
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY 260 OR COPPER ALLOY 268 OR COPPER ALLOY 270 OVERALL
FASTENER LENGTH0.710 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-613 AL 260 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626 AL 260 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-613 AL 268 FED SPEC 2ND MATERIAL RESPONSE OR QQ-B-626 AL 268 FED SPEC 2ND MATERIAL RESPONSE OR QQ-W-321 AL 270 FED SPEC 3RD MATERIAL RESPONSE OVERALL
NONMACHINE NOMINAL THREAD DIAMETER0.086 INCHES IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
NONMACHINE THREAD STYLEGIMLET POINT (TYPE A, AB OR BA)
HEAD DIAMETER0.150 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
MS35492-598Interchangeable
interchangeable cross-reference
interchangeable
FF-S-111DInterchangeable
interchangeable cross-reference
interchangeable
MS35492-98Interchangeable
interchangeable cross-reference
interchangeable
FFS111Interchangeable
interchangeable cross-reference
interchangeable
AN550-4R12Interchangeable
interchangeable cross-reference
interchangeable
MS35492-271Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN550B2R6?
AN550B2R6 is a SCREW,WOOD.
What parts can replace AN550B2R6?
There are 15 known substitutes for AN550B2R6: MS35492-598, FF-S-111D, MS35492-98 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN550B2R6?
AN550B2R6 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-180-1631. 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