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123WM10111-623 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

123WM10111-623: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OVERALL, head_style: FLAT COUNTERSUNK, thread_class: 3A A, head_diameter: 0.531 INCHES NOMINAL IN, thread_length: 0.357 INCHES MINIMUM AND 0.407 INCHES MAXIMUM IN, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF) CONCENTRIC HOLE. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-206-3448, 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
123WM10111-623
NSN: 5306-01-206-3448
FSC: 5306 — Bolts
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OVERALL
head_styleFLAT COUNTERSUNK
thread_class3A A
head_diameter0.531 INCHES NOMINAL IN
thread_length0.357 INCHES MINIMUM AND 0.407 INCHES MAXIMUM IN
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF) CONCENTRIC HOLE
fastener_length0.949 INCHES MINIMUM AND 0.979 INCHES MAXIMUM IN
special_featuresTORQUE SLOT IN HEAD 0.080 INCH MIN,0.084 INCH MAX DIA IN
style_designatorCONCENTRIC HOLE THREADED
thread_directionRIGHT-HAND
threads_per_inch28 CONCENTRIC HOLE
countersink_angle100.0 DEGREES NOMINAL
NSN5306-01-206-3448
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 123WM10111-623 · 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
•
FASTENER LENGTH: 0.949 INCHES MINIMUM AND 0.979 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
INTERNAL THREAD LENGTH: 0.343 INCHES MINIMUM AND 0.413 INCHES MAXIMUM CONCENTRIC HOLE IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF) CONCENTRIC HOLE
•
INTERNAL THREAD DIRECTION: RIGHT-HAND CONCENTRIC HOLE
•
THREAD LENGTH: 0.357 INCHES MINIMUM AND 0.407 INCHES MAXIMUM IN
•
THREADS PER INCH: 28 CONCENTRIC HOLE
•
STYLE DESIGNATOR: CONCENTRIC HOLE THREADED
TECHNICAL CHARACTERISTICS
FASTENER LENGTH0.949 INCHES MINIMUM AND 0.979 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
INTERNAL THREAD LENGTH0.343 INCHES MINIMUM AND 0.413 INCHES MAXIMUM CONCENTRIC HOLE IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF) CONCENTRIC HOLE
INTERNAL THREAD DIRECTIONRIGHT-HAND CONCENTRIC HOLE
THREAD LENGTH0.357 INCHES MINIMUM AND 0.407 INCHES MAXIMUM IN
THREADS PER INCH28 CONCENTRIC HOLE
STYLE DESIGNATORCONCENTRIC HOLE THREADED
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 123WM10111-623?
123WM10111-623 is a BOLT,INTERNALLY RELIEVED BODY.
What is the NSN for 123WM10111-623?
123WM10111-623 is cataloged in the U.S. Government catalog under NSN 5306-01-206-3448. 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.