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S37B551CSI — NUT,PLAIN,BLIND RIVET

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S37B551CSI: NUT,PLAIN,BLIND RIVET.

The NUT,PLAIN,BLIND RIVET is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1108 OR STEEL COMP 1110 OVERALL, nut_style: BLIND RIVET W/SMOOTH ROUND SHANK, head_style: FLAT COUNTERSUNK, nut_length: 1.735 INCHES MINIMUM AND 1.765 INCHES MAXIMUM IN, nut_diameter: 0.486 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN, thread_class: 3B. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-422-3029, 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
S37B551CSI
NSN: 5310-01-422-3029
FSC: 5310 — Nuts and Washers
CAGE: 0VK23 — BOLLHOFF RIVNUT., INC. FASTENING AND ASSEMBLY TECHNOLOGY DBA BOLLHOFF RIVNUT., INC. DIV BOLLHOFF RIVNUT., INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 1108 OR STEEL COMP 1110 OVERALL
nut_styleBLIND RIVET W/SMOOTH ROUND SHANK
head_styleFLAT COUNTERSUNK
nut_length1.735 INCHES MINIMUM AND 1.765 INCHES MAXIMUM IN
nut_diameter0.486 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
thread_class3B
head_diameter0.770 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
shank_end_typeCLOSED
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.375 INCHES IN
NSN5310-01-422-3029
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S37B551CSI · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NUT LENGTH: 1.735 INCHES MINIMUM AND 1.765 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
HEAD COUNTERSINK ANGLE: 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
SHANK END TYPE: CLOSED
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
TECHNICAL CHARACTERISTICS
NUT LENGTH1.735 INCHES MINIMUM AND 1.765 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
HEAD COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
SHANK END TYPECLOSED
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
NUT DIAMETER0.486 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OVERALL
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 3
1339AS337-71Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S37B551CS1Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
CB03716S551VReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 S37B551CSI?
S37B551CSI is a NUT,PLAIN,BLIND RIVET.
What parts can replace S37B551CSI?
There are 3 known substitutes for S37B551CSI: 1339AS337-71, S37B551CS1, CB03716S551V. Substitute compatibility should be verified for your specific system.
What is the NSN for S37B551CSI?
S37B551CSI is cataloged in the U.S. Government catalog under NSN 5310-01-422-3029. 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.