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11841-5-20-85 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

11841-5-20-85: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include head_style: SPLINE EXTENDED WASHER, head_height: 0.247 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.526 INCHES MINIMUM AND 0.576 INCHES MAXIMUM IN, thread_series: UNJC CONCENTRIC HOLE, fastener_length: 1.786 INCHES MINIMUM AND 1.816 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-304-7960, 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
11841-5-20-85
NSN: 5306-01-304-7960
FSC: 5306 — Bolts
CAGE: 59563 — REID PRODUCTS INC. DBA REID PRODUCTS INC (USA)
SPECIFICATIONS
head_styleSPLINE EXTENDED WASHER
head_height0.247 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN
thread_class3A A
thread_length0.526 INCHES MINIMUM AND 0.576 INCHES MAXIMUM IN
thread_seriesUNJC CONCENTRIC HOLE
fastener_length1.786 INCHES MINIMUM AND 1.816 INCHES MAXIMUM IN
special_featuresINJECTION PORT 0.120 IN. LG,0.060 IN. WIDE IN UNTHD SHANK; DISTANCE FROM HEAD TO BEGINNING OF INJECTION PORT 0.850 IN. IN
style_designatorCONCENTRIC HOLE THREADED
thread_directionRIGHT-HAND
threads_per_inch32 CONCENTRIC HOLE
surface_treatmentPASSIVATE OVERALL
head_minor_diameter0.360 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
NSN5306-01-304-7960
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 11841-5-20-85 · 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: 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.247 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.786 INCHES MINIMUM AND 1.816 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXTENDED WASHER DIAMETER: 0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN
•
INTERNAL THREAD LENGTH: 0.300 INCHES MINIMUM AND 0.345 INCHES MAXIMUM CONCENTRIC HOLE IN
•
THREAD SERIES: UNJC CONCENTRIC HOLE
•
INTERNAL THREAD DIRECTION: RIGHT-HAND CONCENTRIC HOLE
TECHNICAL CHARACTERISTICS
EXTENDED WASHER THICKNESS0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
HEAD HEIGHT0.247 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN
FASTENER LENGTH1.786 INCHES MINIMUM AND 1.816 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EXTENDED WASHER DIAMETER0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN
INTERNAL THREAD LENGTH0.300 INCHES MINIMUM AND 0.345 INCHES MAXIMUM CONCENTRIC HOLE IN
THREAD SERIESUNJC CONCENTRIC HOLE
INTERNAL THREAD DIRECTIONRIGHT-HAND CONCENTRIC HOLE
THREAD LENGTH0.526 INCHES MINIMUM AND 0.576 INCHES MAXIMUM IN
THREADS PER INCH32 CONCENTRIC HOLE
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
3M1043-5-20-85Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 11841-5-20-85?
11841-5-20-85 is a BOLT,INTERNALLY RELIEVED BODY.
What parts can replace 11841-5-20-85?
There is 1 known substitute for 11841-5-20-85: 3M1043-5-20-85. Substitute compatibility should be verified for your specific system.
What is the NSN for 11841-5-20-85?
11841-5-20-85 is cataloged in the U.S. Government catalog under NSN 5306-01-304-7960. 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.