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A51B61527-13 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

A51B61527-13: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY OVERALL, hole_type: DRILLED, head_style: HEXAGON EXTENDED WASHER, head_height: 0.375 INCHES NOMINAL IN, thread_class: 3A A, hole_diameter: 0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-372-5676, 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
A51B61527-13
NSN: 5306-01-372-5676
FSC: 5306 — Bolts
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialTITANIUM ALLOY OVERALL
hole_typeDRILLED
head_styleHEXAGON EXTENDED WASHER
head_height0.375 INCHES NOMINAL IN
thread_class3A A
hole_diameter0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN
hole_quantity2
thread_length0.874 INCHES NOMINAL IN
fastener_length5.312 INCHES NOMINAL IN
shoulder_length4.438 INCHES NOMINAL IN
style_designatorCOUNTERBORE UNTHREADED
thread_directionRIGHT-HAND
NSN5306-01-372-5676
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: A51B61527-13 · 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
•
EXTENDED WASHER THICKNESS: 0.100 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.375 INCHES NOMINAL IN
•
FASTENER LENGTH: 5.312 INCHES NOMINAL IN
•
EXTENDED WASHER DIAMETER: 1.250 INCHES NOMINAL IN
•
THREAD LENGTH: 0.874 INCHES NOMINAL IN
•
HOLE CONFIGURATION STYLE: ROUND PERPENDICULAR
•
STYLE DESIGNATOR: COUNTERBORE UNTHREADED
•
MATERIAL DOCUMENT AND CLASSIFICATION: G-3111 MFR REF SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.100 INCHES NOMINAL IN
HEAD HEIGHT0.375 INCHES NOMINAL IN
FASTENER LENGTH5.312 INCHES NOMINAL IN
EXTENDED WASHER DIAMETER1.250 INCHES NOMINAL IN
THREAD LENGTH0.874 INCHES NOMINAL IN
HOLE CONFIGURATION STYLEROUND PERPENDICULAR
STYLE DESIGNATORCOUNTERBORE UNTHREADED
MATERIAL DOCUMENT AND CLASSIFICATIONG-3111 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.500 INCHES IN
COUNTERBORE DEPTH3.720 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 1
E5306000085703Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51B61527-13?
A51B61527-13 is a BOLT,INTERNALLY RELIEVED BODY.
What parts can replace A51B61527-13?
There is 1 known substitute for A51B61527-13: E5306000085703. Substitute compatibility should be verified for your specific system.
What is the NSN for A51B61527-13?
A51B61527-13 is cataloged in the U.S. Government catalog under NSN 5306-01-372-5676. 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.