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3B8557 — GROMMET,NONMETALLIC

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

3B8557: GROMMET,NONMETALLIC.

The GROMMET,NONMETALLIC is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, groove_width: 0.656 INCHES NOMINAL IN, grommet_style: ROUND, hole_diameter: 0.500 INCHES NOMINAL IN, overall_height: 1.031 INCHES NOMINAL IN, flange_thickness: 0.188 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-423-9162, 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
3B8557
NSN: 5325-00-423-9162
FSC: 5325 — Fastening Devices
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
groove_width0.656 INCHES NOMINAL IN
grommet_styleROUND
hole_diameter0.500 INCHES NOMINAL IN
overall_height1.031 INCHES NOMINAL IN
flange_thickness0.188 INCHES NOMINAL IN
groove_outside_diameter1.000 INCHES NOMINAL IN
grommet_construction_typeSPLIT
large_flange_outside_diameter1.500 INCHES NOMINAL IN
NSN5325-00-423-9162
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3B8557 · 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
•
GROMMET STYLE: ROUND
•
FLANGE THICKNESS: 0.188 INCHES NOMINAL IN
•
LARGE FLANGE OUTSIDE DIAMETER: 1.500 INCHES NOMINAL IN
•
GROOVE OUTSIDE DIAMETER: 1.000 INCHES NOMINAL IN
•
GROMMET CONSTRUCTION TYPE: SPLIT
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
GROOVE WIDTH: 0.656 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.031 INCHES NOMINAL IN
GROMMET STYLEROUND
FLANGE THICKNESS0.188 INCHES NOMINAL IN
LARGE FLANGE OUTSIDE DIAMETER1.500 INCHES NOMINAL IN
GROOVE OUTSIDE DIAMETER1.000 INCHES NOMINAL IN
GROMMET CONSTRUCTION TYPESPLIT
MATERIALRUBBER SYNTHETIC OVERALL
GROOVE WIDTH0.656 INCHES NOMINAL IN
HOLE DIAMETER0.500 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3B8557?
3B8557 is a GROMMET,NONMETALLIC.
What is the NSN for 3B8557?
3B8557 is cataloged in the U.S. Government catalog under NSN 5325-00-423-9162. 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.